UNITED STATES AND MEXICAN

bOUNDARY SURVEY,

UNDER TIIE ORDER OF

LIEUT. COL. W. H. EMORY,

MAJOR FIRST CAVALRY, AND UNITED STATES COMMISSIONER.

REPTILES
OFTHE BOUNDARY,

SPENCER F. BAIRD,
ASSISTANT asik OF THE SMITHSONIAN INSTITUTION.

WITH NOTES BY THE NATURALISTS OF THE SURVEY.

WiıssouR!I ВОТАМІСЕЕ
BARDEN LIBRARY

>

CHELONIA.

1. ASPIDONECTES EMORYI, Agassiz.—Soft-shelled Turtle.
Aspidonectes Emoryi, Aaassiz, Contributions to Nat. Hist. U. S., І, 1857, 401.

Lower Rio Grande of Texas. J. H. Clark.
2. GYPOCHELYS LACERTINA, Agassiz.—Alligator Turtle.

Gypochelys lacertina, Acass. Cont. T, 1857, 414.
Chelydra lacertina, ScnwEIccER, Prodromus.
Chelonura temminckii, HOLBROOK.

Lowlands of Texas.
3. OZOTHECA TRISTYCHA, Agassiz.
Ozotheca tristycha, Aaassiz, Cont. I, 1857, 425.
Medina river, Texas. Dr. Kennerly.
4. THYROSTERNUM SONORIENSE, Agassiz.

Kinosternon sonoriense, Leconte, Pr. А. N. Sc. VII. 1853, 184.
Thyrosternum sonoriense, Acassiz, Contributions, І, 1857, 428; pl. v, figs. 8-11.

Tucson and Guadalupe сайоп. Dr. Kennerly.
5. PLATYTHYRA FLAVESCENS, Agassiz.
Platythyra flavescens, Acassiz, Contributions, І, 1857, 430; pl. v, fig. 12-15.
Texas, and valley of Gilla.
6. PTYCHEMYS MOBILENSIS, Agassiz.

Emys mobilensis, Нотввоок, N. Am. Herp. I, 1842, 71; pl. ix,
Ptychemys mobilensis, Acassiz, Contributions, І, 1857, 433; pl. iii, figs. 14—16
Guadalupe mountains and Pecos river, Texas.
7. TRACHEMYS ELEGANS, Agassiz.
Emys elegans, Maxim. Reise Nord. Am, I, 1839, 213.
Trachemys elegans, Acassiz, Cont. I, 1857, 435.

Brownsville, Texas.

3 Nore.—The descriptions of genera and species іп the present article have been either omitted entirely, or in most cases
greatly curtailed, owing to the fact that the report, as prepared, greatly exceeded the limits of space assigned.

A number of the species have been determined, or their characters better defined, by Dr. Girard and Mr, Kennicott. The
contributions of those gentlemen have their name attached.—(S. Е. BAIRD.)

UNITED STATES AND MEXICAN BOUNDARY.

8. CHRYSEMYS OREGONENSIS, Agassiz.

Етуз oregonensis, HARLAN, Amer. Jour. Sc. XXXI, 382.
Chrysemys oregonensis, Acassiz, Cont. I, 1857, 440.

Guadalupe mountains, Texas.

9. XEROBATES BERLANDIERI, Agassiz.—Texas Gopher.

Xerobates berlandieri, Ававвп, Cont. 1, 1867, 447

Lower Rio Grande.

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ИА

SAURIA.

10. ALLIGATOR LUCIUS, Cuv.
3184. Brownsville, Texas. Capt. Van Vliet.

11. SCELOPORUS СБАККТ, В. & С.

Sceloporus clarkii, B. & G. Pr. A. N. Sc. VI, Aug. 1852, 127.
Sceloporus magister, Harrow. Pr. А. N. Sc. VII, 1854, 93.

2940. Sonora. J. Н. Clark.—2897. Alamo de Parras, Mex. Lt. Couch.— 2964. Janos.
Dr. Kennerly.—2965. Sta. Madelina. А. Schott.— 2954. Los Nogales, Sonora. Dr.
Kennerly.

12. SCELOPORUS SPINOSUS, Тотев,
PLATE XXIX, Fies. 4—6.
Sceloporus spinosus, WiEGMANN, Isis, 1828, 369— Тв. Негр. Mex. 1834, 50; pl. vii.

2968. El Paso. J. H. Clark. —2943. Indianola, Tex. J. Н. Clark.—2945. Laredo to
Camargo. A. Schott.

13, SCELOPORUS CONSOBRINUS, В, & 6.
Sceloporus consobrinus, B. & G. Marcy’s Report, 1853, 237.
4109. К. San Pedro, Tex. J.H. Clark.— 2899. Janos to бап Luis Springs. Dr. Kennerly.
14. SCELOPORUS TORQUATUS, Wiegm.

Agama torquata, PEALE & Green, Pr. А. М. Sc. П, 131.
Sceloporus torquatus, Wiremann, Isis, 1828, 369.

2959. Laredo to Camargo. А. Schott.
15. SCELOPORUS POINSETTII, B. & G.
PHATE XXIX, Fries. 1—3.
` Sceloporus poinsettii, В. & б. Pr. А. N. Sc. VI, Aug. 1859, 196.

2952. Sonora. J. Н. Clark.—2955. Limpia mountains, Тех. Dr. Kennerly.—2948.
San Pedro. J. H. Clark.

16. SCELOPORUS ORNATUS, Baird.

Sceloporus ornatus, Ватко, Pr. А. N. Sc. Dec. 1858.

Sr. Сн.--Вогва! scales in about 64 oblique series, with but slight carination, mucronation, and denti-
culation. Femoral pores, 12. А well marked black cervical collar, complete above, and margined with

6 UNITED STATES AND MEXICAN BOUNDARY.
yellowish. Color dark green above, nearly black towards the median line. Back with small yellowish
spots.

2845. Patos, Coahuila. Lt. Couch.

17. SCELOPORUS THAYERI, B. & G.
Sceloporus thayeri, B. & G., Pr. A. N. Sc. VI, Aug. 1852, 127.
2896. San Pedro, Texas, J. H. Clark.—2887. Indianola. J. H. Clark.
18. SCELOPORUS SCALARIS, Wiegmann.

Sceloporus scalaris, УУтЕвм. Herp. Mex. 1834, 52: tab. viii, f. 2.
2284. Los Nogales, Sonora. Dr. Kennerly.
19. SCELOPORUS MARMORATUS, Hallow.
Sceloporus marmoratus, Harrow. Pr. А. N. Sc. VI, Oct. 1852, 178.
Sceloporus delicatissimus, Harrow. Pr. А. N. Sc. VI, Oct. 1852, 178.
2916. Medina, Texas. J. Н. Clark.—4116. Redmond's Ranch, Texas. J. Н. Clark.

20. SCELOPORUS СООСНП, Baird.

Sceloporus couchii, Влівр, Pr. А. N. Sc. Dec. 1858.

Sr. ها‎ General appearance of S. marmoratus, Hall. Cephalic plates smooth. Scales very small.
About 80 oblique dorsal rows from head to tail. Femoral pores, 25. Color above dark green, with
two lateral light stripes, separated by 18 rows of scales. Back with irregular spots, Sides with a
white band from groin. An obsolete dark indigo patch on each side the belly, widely separated below-
Sides of jaw banded transversely with blue and whitish. A sub-circular indigo patch in front of shoulder,
surrounded by light blotches.

2904. Ревашетіа Grande, Mexico. 14. Couch.— 2789. Santa Caterina, New Leon. Lt.
` Couch.
21. EUPHRYNE OBESA, Baird.
Prate XXVII.
Euphryne obesus, Ban, Pr. А. N. Sc. Dec. 1858.

Sr. Сн.- Width of head nearly equal to distance from nose to ear. Tail shorter than the body. General
color of the young, olive green, with five broad transverse bars above from head to base of tail, and
about as many on the tail; these rings yellow, dotted with red. Beneath, pea green, dotted with black.
With increasing age the bands become obsolete and disappear, the general color becoming reddish olive.

2114 Fort Yuma. Major Thomas.— 4112. По. А. Schott.

22. CROTAPHYTUS COLLARIS, Holbrook.

Agama collaris, Say, Long’s Exped. II, 1823, 959,
Crotaphytus collaris, Hors. N. Am. Herp. II, 1842, 12: pl. x.

2694. Sonora. Dr. Kennerly.—2110. San Antonio to El Paso. J. Н. Clark.
23. OROTAPHYTUS RETICULATUS, Baird.
Crotaphytus reticulatus, Bam, Pr. А. N. Sc. Doo. 1898,

Sr. Cx.—Infra-orbital chain in a series of six or eight nearly equal plates. Scales on the gular fold
much smaller than those between the fore legs. Above ashy gray, with a hexagonal reticulation of

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— 3

REPTILES. 1
lighter; the interstices here and there dark brown. Chin and throat reticulated. Neither black collar
nor light spots. More closely related to Crotaphytus collaris than to Crotaphytus ( Gambelia) wislizenii.

2692. Ringgold Barracks, Texas. J. H. Clark.—2731. Laredo, Texas. A. Schott.

24. CROTAPHYTUS WISLIZENII, B. & G.
PLETE ХХХІ.
Crotaphytus wislizenii, В. 4: С. Pr. А. М. Sc. VI, April, 1852, 69.

Crotaphytus gambelii, В. & б. Pr. А. М. Sc. VI, Aug. 1852, 126.
Crotaphytus fasciatus, HalLower, Pr. A. N. Sc. VI, Dec. 1852, 207.

2704. San Antonio to El Paso. J. Н. Clark.—2685. Sonora. J. Н. Clark.

25. UTA STANSBURIANA, B. & G.

Uta stansburiana, В. &. С, Pr. A. Х. Sc. VI, April, 1852, 69.
2745. Бап Antonio to El Paso. J. Н. Clark.— 2740. Gila desert. А. Schott.
26. UTA ORNATA, B. & G.
Uta ornata, B. & G., Pr. A. Х. Sc. VIT, Aug. 1852, 126.
2700. San Pedro, Texas. J. Н. Clark.—2164. Eagle Pass, Texas. А. Schott.—2737.
Sonora. J. H. Clark.
27. UTA ORNATA var. LINEARIS, Baird.

Similar in markings to the described character of U. ornata, but with four linear interrupted black
stripes instead of transverse bands.

2759. Los Nogales, Sonora. Dr. Kennerly.

28. UTA SYMMETRICA, Baird.
Uta symmetrica, Валтер, Рг. А. N. Se. Dec. 1858.

бр. Cn.—Larger dorsal scales in four regular series, two on either side of the median smaller ones.
Head short, depressed, one and а balf times as wide as deep. Тай one and a half times the head and
body. General color light brown above, the belly white. Sides with broad transverse bands of blackish.
Size of U. ornata.

2760. Gila river. А. Schott.

29. UTA SCHOTTII, Baird.
Uta schottii, Ban, Pr. А. №. Sc. Dec. 1858.

Бр. Cx.—Dorsal scales and size as in the last. Head pointed, narrow, nearly or quite as high as wide.
General color nearly black, scarcely lighter beneath. Back with small blue spots. Tail banded laterally
with the same.

3161. Santa Madelina. А. Schott.
30. СТА GRACIOSA, Baird.
Urosaurus graciosus, HALLOWELL, Pr. А. N. Sc. VII, June, 1854, 92.
4128. Colorado river, California. А. Schott.

8 UNITED STATES AND MEXICAN BOUNDARY,

31, DIPSOSAURUS DORSALIS, Hallowell.
PLATE ХХХІІ, Fics. T—13.

Crotaphutus dorsalis, В. & С. Pr. А. N. Sc. VI, Aug. 1852, 126.
Dipsosaurus dorsalis, Наш, Pr. A. Х. 5. ҮП, June, 1854, 92.

4178. Colorado desert. А. Schott.
32. CALLISAURUS VENTRALIS, Baird.
Homalosaurus ventralis, HALLOWELL, Pr. А. N. Sc. VI, October, 1852, 179,
2981. Colorado desert. A. Schott.
33. HOLBROOKIA MACULATA, Girard.
Holbrookia maculata, GIRARD, Pr. Am. Assoc. for 1850-1851, 201
2807. San Antonio to ЕІ Paso. J. Н. Clark.
34. HOLBROOKIA PROPINQUA, В. 4 6.
Holbrookia propinqua, В. & G., Pr. A. N. Sc. VI, Aug. 1852, 126.
2611. Indianola to San Antonio. J. Н. Clark.
35. HOLBROOKIA APPROXIMANS, Baird.

Holbrookia approximans, Bam, Pr. А. N. Sc. Dec. 1858.

Sr. Сн.- Similar in size and general character to Н. maculata. Tail shorter than body. Two small
vertical indigo black patches on the side of the belly, entirely visible from below, with a light blue
areola. Central point of belly about opposite the middle point between the two patches. No light
stripe on side of neck. Upper parts and sides gray, sprinkled with whitish. Head broad, very convex
above. Hind foot about one-third the head and body.

Tamaulipas. Lt. Couch.
. 36. HOLBROOKIA TEXANA, В. & G.
PLATE XXX.

Cophosaurus texanus, Твовснеі, Wiegmann’s Archiv für 1850, 1859, 389.
Holbrookia texana, B. & G. Pr. А. N. Sc. VI, Aug. 1852, 195.

2659. San Pedro, Texas. J. Н. Clark.— 2182. Colorado desert, California. А. Schott.
31. HOLBROOKIA AFFINIS, B. & G.
Holbrookia affinis, В. & С. Pr. A. N. Sc. VI, Aug. 1859, 195.
2661. Sonora. J. H. Clark.
38. TAPAYA HERNANDEZII, Girard.

Тарауа hernandezii, бтвавр, Herp. U. S. Ex. Ex. 1858, 395.
Sr. Сн.--Неай large, depressed; vertex broad, slightly inclined anteriorly, snout protruding. Cephalic
piates small; occipital and temporal spines small and conical. External ears simple, granular. Mental
scales very gmail: the series adjoining the sub-maxillar shields larger than the rest. Several folds under

с чье C | 2-63!

REPTILES. 9

the throat minutely granular. Abdominal scales small, sub-rhomboid, acuminated. Terminal pores
small, not continuous across the interfemoral region. Color blackish brown above, with a double or
quadruple series of black, light margined spots. Beneath yellowish, unicolor, or else obscurely macu-
lated.—(Gmanp.)

No. 195. Between Guadalupe mountains. Pecos. А. Schott.—Chihuahua. J. Н. Clark.
39. TAPAYA ORNATISSIMA, Girard.
Phrynosoma orbiculare, Harr. Sitgreaves’ Exped. 1853, 125; pl. viii, ix.
Tapaya ornatissima, GIRARD, Herp. U. S. Ex. Ex. 1858, 396.

No. 205. Pecos to Rio Grande, Texas. Пт. Kennerly.—No. 206. Janos to San Luis
Springs. Dr. Кеппегіу.
40. PHRYNOSOMA CORNUTUM, Gray.
Agama cornuta, Hart. J. A. N. Sc. ТҮ, п, 1825, 299, |
Phrynosoma cornutum, Gray, Syn. Rept. Griff. Cuv. ІХ, 1831, 45.
No. 121. Indianola, and 122, San Antonio. J. H. Clark.—No. 126. Eagle Pass, Texas.
А. Schott.—No. 124. Los Nogales. Dr. Kennerly.

41. PHRYNOSOMA REGALE, Girard.

Puare XXVIII, Fics. 1—3.
Phrynosoma regale, бтвавр, Herp. U. 5. Ех. Ex. 1858, 406.

Sr. Сн.- Vertex and occipital regions quite depressed. Temporal and occipital spines flat and acute,
constituting а continuous series, very much inclined backwards. Labial plates proportionally well
developed, unequal, and rugose. Scales under the chin small, rounded, sub-convex; largest series
sub-pyramidal and acuminated. Pectoral scales moderate, and acuminated also. Lower series of sub-
pyramidal scales at the periphery of the abdomen obsoletely developed. Abdominal scales sub-rhombic,
not acuminated, and slightly, though distinctly, keeled. Femoral pores small and closely set together;
the series from either side not continuous on the interfemoral region, over which they somewhat extend.
Post-anal scales very minute. Ground color brownish olive above, back, limbs, and tail transversely
maculated with black; beneath yellowish, with small black spots over the middle of the abdomen.—
( GIRARD.)

From the valleys of the Gila and Colorado rivers.
No. 161. Gila and Colorado desert. A. Schott.
42. DOLIOSAURUS МеСАШІ, Girard.
. Puate XXVIII, Fics. 4—6. 5

Anota тосайй, Harrow. Pr. А. N. Sc. VI, 1859, 189.
Doliosaurus mc'callii, Girard, Негр. U. S. Ex. Ех. 1858, 400.

Sp. Cu.—Cephalic plates moderate. Occipital spines rather elongated and slender. Sub-maxillar shields

very large; posterior ones spinous. No external auricular aperture. Scales under the chin very small,

sub-equal, with two distant longitudinal series of somewhat larger ones, Pectoral scales large, carinated,
and acuminated. А triple series of sub-pyramidal scales at the periphery of the abdomen; middle one
alone well developed. Abdominal scales small, slightly carinated. Femoral pores extending so mewhat
over the interfemoral region, though the series from either side are not continuous. Yellowish olive
above, with a dorsal black line, and a double series of rounded spots on either side of the back, uniting
into one along the tail; whitish yellow beneath, unicolor.—( GIRARD.)

No. 162. Gila and Colorado deserts. А. Schott.
ёс.

10 UNITED STATES AND MEXICAN BOUNDARY.

43. DOLIOSAURUS MODESTUS, Girard.
Phrynosoma modestum, Олвлвр, Stansbury's Expl. Great Salt Lake, 1852, 361, 365; pl. vi,
figs. 4—8.
Doliosaurus modestus, GIRARD, Herp. U. S. Ex. Ex. 1858, 409.
No. 164. San Antonio to El Paso.—No. 166. Sonora. J. Н. Clark.—No. 168. Los
Nogales.—No. 170. Janos. Dr. Kennerly.
44. CNEMIDOPHORUS GRAHAMII, B. & G.
Prate XXXII, Fies. 1—6.
Cnemidophorus grahamii, B. & С. Pr. А. N. Sc. VI, Aug. 1852, 128.
3045. San Antonio to El Paso. J. Н. Clark.—3044. Тов Nogales. Dr. Kennerly.
45. CNEMIDOPHORUS INORNATUS, Baird.

Cnemidophorus inornatus, Влтвр, Pr. А. N. Sc. Dec. 1858.

Sr. Cu.—Scales оп the gular fold smaller than those on the breast anteriorly, and scarcely larger than
those on the middle of the chin. Scales of back tubercular and elevated. Hind feet about. two-fifths the
head and body. General color light greenish olive, paler beneath. No lines on the body.

3032. Реввшегіа Grande. New Leon. Lieutenant Couch.

46. CNEMIDOPHORUS OCTOLINEATUS, Baird.

Cnemidophorus octolineatus, Ban, Pr. А. N. Sc. Dec. 1858.

Sr. Cn. ы 29 asi in devs last. Hind foot not two-fifths the head and body. Scales of back depressed.
General c paler beneath, Back with eight equi-distant and approximated light lines.

3009, qued Grande. New Leon. Lieutenant Couch.

41. CNEMIDOPHORUS PERPLEXUS, В. & G.
Cnemidophorus perplexus, В. & б. Pr. А. N. Sc. VI, Aug. 1859, 198.
3020. San Pedro, Texas. J. Н. Clark.—3008. Tucson. Dr. Kennerly.
48. CNEMIDOPHORUS TIGRIS, В. 4 6.
Prate XXXIII.
nemidophorus tigris, В. & G. Pr. А. N. Sc. ҮІ, Ap. 1859, 69.

у бышык marmoratus, В. & б. Pr. А. N. Sc. VI, Aug. 1852, 198.
Cnemidophorus undulatus, Harrow. Pr. А. N. Sc. VII, June, 1854, 94.

3024. San Antonio to El Paso. J. Н. Clark.—3036. Laredo. А. Schott.
49. CNEMIDOPHORUS GRACILIS, B. & 6.
Puate. XXXIV, Fics. 1—14.

٢ В. & б. Pr. А. N. Sc. ‘VI, Aug. Же‏ س
Castanuelas, Coahuila. Lieutenant Couch.‏ .3019

кити тир

. REPTILES. 11

CNEMIDOPHORUS GULARIS, B. & С.
PLATE XXXIV, 1108. 1—6.

Cnemidophorus gularis, B. & б. Pr. А. N. Sc. VI, Aug. 1852, 128.
Cnemidophorus guttatus, Нллож. Pr. А. N. Sc. VII, Oct. 1854, 192.

3010. Eagle Pass, Tex. А. Schott.—2989. Indianola, Tex. J. Н. Clark.
50. HELODERMA HORRIDUM, Wiegm.
Plate XXVI.
Heloderma horridum, سو‎ Isis, 1899, 697.--Ів. Негр. Mex. 1834.
2971. Sierra de Іа Union. Sonora. А. Schott.
51. GERRHONOTUS WEBBII, Baird.
Prate XXIV, Fres. 1—10. Young.

Gerrhonotus webbii, Ватвр, Pr. А. N. Sc. Dec. 1858.

Sr. Сн.--Тай 21 times the head and body. Scales strongly carinated. Dorsal scales in 48 transverse
rows. Body encircled by 26 rows of scales, of which 12 are ventral. Hind feet longer than from snout
to ear. Above leaden olivaceous brown, lighter beneath. Back with ten or twelve blackish bars, bor-
dered in front by brownish or reddish yellow.

3205. San Diego.—3078. San Diego to El Paso. Dr. Webb.

52. GERRHONOTUS NOBILIS, Bg.

PLATE XXV, Fics. 1—8.
Elgaria nobilis, B. & G., Pr. A. М. Sc. VI, Aug. 1859, 199.

3016. Coppermines of N. M. J. Н. Clark.

53. GERRHONOTUS INFERNALIS, Baird.
Gerrhonotus infernalis, Baird, Pr. А. N. Sc. Dec. 1858.

Sp. Cu.—Dorsal scales carinated, in 16 longitudinal rows; ventral in 19. Nasal plate in contact with
the 2d labial only. Тай twice as long as head and body. 51 transverse rows of scales from head to
tail. Color clear light olive, with 8 cross bars of dusky. Beneath yellowish, marbled faintly with dull
olive. Head plain.

3090. Devil’s river, Тех. Dr. Kennerly.

54. GERRHONOTUS OLIVACEUS, Baird.

Gerrhonotus olivaceus, Ватко, Pr. А. ЇЧ. Sc. Dec. 1858,

Sr. Он. —No single frontal. A series of three pairs of plates between the vertical and rostral, becoming
successively smaller. Two post-nasals; one loral. 39 transverse rows of scales on back from head to
tail. 12 longitudinal rows above; the 6 central strongly carinated. Color dark olive green, with a
series of faint dusky bars. Beneath greenish white.

3096. Near San Diego, Cal. А. Schott.

19 UNITED STATES AND MEXICAN BOUNDARY.

55. PLESTIODON GUTTULATUS, Hallow.

Lamprosaurus guttulatus, HaLLOwELL, Pr. А. №. Sc. VI, Dec. 1852, 206.
Plestiodon guttulatus, Hatuowe.t, Pr. А. N. Sc. VII, Dec. 1851, 215.

3167. San Elziario, Tex. Dr. Kennerly.
56. ANOLIS CAROLINENSIS, Cuv.
2988. Victoria, Tex. Dr. Kennerly.

51. PHYLLODACTYLUS TUBERCULOSUS, Wiegm.
Puare XXIII, Fies. 1—8.
Phyllodactylus tuberculosus, Утесм. Nova Acta, К. І. C. Acad. ХХІІ, 1, 241.
No. 3208. Durango, Mex. Dr. T. H. Webb.
57. SPHAERIODACTYLUS NOTATUS, Baird.
PLATE XXIV, Fics. 29--31.

Sphaeriodactylus notatus, Bap, Pr. A. N. Sc. Ph. Dec. 1858.

Sr. Cx.—Scales on back and sides large, equal, strongly carinated; those on belly smaller, smooth,
hexagonal. Above light brownish yellow, uniformly dotted above with reddish brown, most distinct on
the head, least so on the belly.

Hab.—Key West, Fla., Professor Agassiz and Prof. W. Н. B. Thomas. Type No. 3215.

This species, though not an inhabitant of the regions traversed by the Boundary Commission,
is introduced for the purpose of illustrating, by its figures, more fully the characters of Steno-
dactylus and Phyllodactylus.

58. STENODACTYLUS VARIEGATUS, Baird.
Prate XXIII, Fics. 9—27.—Puate XXIV, Fics. 11—19.
s Stenodactylus variegatus, Barro, Pr. А. N. Sc. Dec. 1858.

Sr. Сн.--Неай very broad. Hind foot contained six times in head and body. Above brownish yellow,
ith irregular small blotches of light reddish brown, sometimes in broad transverse bands. Edges of
eyelids and whole under surface opaque white.

3217. Colorado desert. А. Schott.—3211. Live Oak Creek, Tex. Dr. Kennerly.
59. PLESTIODON OBSOLETUS, B. & G.
PLATE XXV, Fics. 9—16.

Plestiodon obsolelum, В. & С. Pr. А. N. Sc. VI, Aug. 1852, 129. |
3133. Western Texas. J. Н. Clark.—3117. El Paso. J. Н. Clark.

60. PLESTIODON TETRAGRAMMUS, Baird.
Plestiodon tetragrammus, Ватвр, Pr. A. N. Sc. Dec. 1858.

Sr. Сн.-Опе post-nasal plate; post-frontal and inter-nasals separated by the post-nasal. Five supra-
orbitals. Dorsal scales of equal width. Light olive green above; sides with two yellowish lines, sepa-

РЕМ

REPTILES. 13

rated by six rows of darker olive scales. Upper labials pure yellowish. Body encircled by about 28 rows
of scales. No dorsal stripe.
3139. Salado river. Dr. Kennerly.—3124. Matamoras, Mex. Lt. Couch.

61. LYGOSOMA LATERALE, Dum. Bib.

Scincus lateralis, Say, Long’s Exp. П, 1823, 824,
Lygosoma lateralis, Dum. Вв. Erp, Gen. VI, 1839, 119.

3126. Indianola, Tex.—3146. San Pedro, Tex. J. H. Clark.
62. ANNIELLA PULCHRA, Gray.
Anniella pulchra, Gray, Annals & Mag. Nat. Hist. X, 1852, 440,
3190. Coast mountains, near San Diego. A Schott.

OPHIDIA.
63. CROTALUS ATROX, B. & G.
РгАТЕ I.
Crotalus atrox, В. & 6. Catal. N. A. Serpents, Jan. 1853, 5.

Nos. 258, 256, 4226, 211. Throughout Texas. Schott, Clarke, Kennerly.
Nos. 466, 467, 468. Bottoms of Gila and Colorado. А. Schott.

64. CROTALUS CONFLUENTUS, Say.
Crotalus confluentus, Say. Long’s Exped. II, 1823, 48.—B. & С. Catal. М. A. Serpents, Jan.

Ко. 4228. Between San Antonio and El Paso. J. Н. Clark.—No. 4247. Cimeron. J.
H. Clark. :
65. CROTALUS MOLOSSUS, B. & G.
PLATE П.

Crotalus molossus, В. & ©. Catal. М. Am. Serp. Jan. 1853, 10.
Crotalus ornatus, Нллот. Pr. А. N. Sc. VII, Oct. 1854, 192.

Хо. 485. Fort Webster. Copper Mines, N. М. J. Н. Clark.
66. CROTALUS TIGRIS, Kennicott.
Prate IV.

Sr. Cu.— Body slender; head small, very much depressed, narrow behind; nose remarkably broad and
obtuse; whole outline of head nearly quadrangular. Superciliaries and frontals smooth; space between
superciliaries very wide; four frontal plates, six post-frontals. Two rows of scales between sub-orbital
chain (which is complete) and the labials. Labials 14 above, 13-14 below. Dorsal rows 21-23; very
slightly carinated. Dorsal scales broad, rounded behind. Color yellowish ash above, with rather small
indistinct dorsal brown blotches anteriorly; two posterior thirds of body banded with brown.—(K еккісотт.)

Deserts of Gila and Colorado.

No. 471. Sierra Verde and Pozo Verde. A. Schott. *
67. CROTALUS CERASTES, Hallowell.
Рілте ІП. :

Crotalus cerastes, Натлотет, Pr. А. N. Se., June, 1854, 95.
` Br. Сн.--Неай small, angles rounded; nose obtuse, much depressed; rostral as broad as high; nostril
In the middle of a single large plate. Lateral edge of superciliary plate elongated into a horn-like
process directed upward over the eye. Two rows of scales between the sub-orbital series (which is

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* REPTILES. 15

complete of large scales,) and the labials. Upper labials 11-18, lower 12-18. Dorsal rows of scales
21, slightly carinated; each scale along the middle of the back with a tubercular swelling toward
the centre. Crown tubercular. Entire head and upper parts of a light yellowish, with a dorsal series
of small indistinct blotches, below which are several irregular rows of isolated brown dots, А narrow
brown stripe extends from the orbit back over the angle of Ше mouth.—(Kewnicorr.)

No. 482. Colorado river, California. A. Schott. Deserts of Gila and Colorado.

68. OROTALOPHORUS CONSORS, B. & G.

Crotalophorus consors, B. & G. Catal. N. A. Serp., Jan. 1858, 12.

Sr. Си —Туепђу-ћуе rows of dorsal scales all carinated, except the two first on either side. Color
olivaceous brown, with seven series of deeper blotches, one dorsal, and three on each side; the dorsal
series rather small and transverse. Yellowish white line from nostril passes between the eye and pit,
and along the upper labials to the angle of the mouth.—(K вмхтсотт. )

No. 512. Indianola, Texas. J. Н. Clark.

69. CROTALOPHORUS EDWARDSII, B. & G.
Puare V, Fic. 1.

Crotalophorus edwardsii, B. & G. Catal. N. Am. Serp., Jan. 1853, 15.

Sr. Сн.- Twenty-three rows of dorsal scales, two first rows smooth. Vertical plate sub
tapering to an acute point posteriorly. ж light yellowish brown, with chestnut blotches ame. than
С. tergeminus or C. consors. Lateral blotches a small. Yellowish line from nostril to angle
of mouth as in С. consors. No RI reddish line

No. 506. Sonora. J. Н. Clark.—511. Brownsville, Texas. J. Н. Clark.

+

70. TOXICOPHIS PUGNAX, В. & G@.—Moccasin.
PLATE VI.

Toxicophis ридпаг, В. « С. Catal. М. Am. Serpents, Jan. 1853, 20.

Sr. Сн —No loral plate. Second labial pressed out of place and with its apex alone on the edge of the
mouth. Twenty-five dorsal rows. Above light olive-brown with transverse dark zigzag bands. Cheeks
uniform light colored.—( Кеххтоотт.)

4262. Indianola, Texas. J. H. Clark.—4263. Eagle Pass, Texas. А. Schott.
T1. ANCISTRODON CONTORTRIX, В. & G.—Copperhead.

Boa contortriz, LINN. Syst. Nat. 1, 1766, 273.
Agkistrodon contortrix, В. & С. Catal. Serp. 1823, 17.

567. Indianola to San Antonio. J. Н. Clark.—571. Sabinal, Texas. J. Н. Clark.

72. ELAPS TENER, B. & G.— Coral Snake.
Рілте УП, Ес. 1

Elaps tener, В. & б. Catal. N. Am. Serp. Jan. 1853, 22.
Sr. Сн.--Неай narrow and elongated for the genus, continuous with the neck and body. Body fawn-
colored (in aleohol) annulated with black and yellow. "The yellow annulations separating the black and

16 | UNITED STATES AND MEXICAN BOUNDARY.

fawn color are each 2 to 91 scales wide. Vertical and occipital plates narrow and elongated. Rostral
wide and high; prefrontals sub-quadrangular.—( К еххісотт.)

1119. San Pedro, Texas. J. Н. Clark.—1127. Eagle Pass, Texas. А. Schott.—1132.
Indianola, Dr. Kennerly.

13. DIPSAS SEPTENTRIONALIS, Kennicott.
PILATE: VIII, Ею. 1.

Sr. Сн. Воду moderately slender, very much tapering anteriorly and posteriorly. Tail slender, about
one-fifth the total length. Head ovoid, somewhat depressed, very large; twice as wide posteriorly ав the
neck. Crown flattened, concave behind the eyes; temporal regions much swollen. Snoutobtusely pointed,
scarcely more depressed than the verticalregion. Vertical plate pentagonal elongated; broader in front,
concave on the sides. Occipitals triangular, nearly as broad as long. Superciliaries small. Rostral
broader than high. Nasals much larger than pre-frontals; two-thirds as high as long; emarginate above
to receive the exterior edge of pre-frontals. Loral smaller than upper pre-orbital; as high as wide. Three
pre-orbitals; the upper more than three times as large as either of the two lower, its inner angle produced
to the vertical, separating the superciliary and post-frontal. Two post-orbitals; upper largest. Eight
upper labials; sixth and seventh four times as large as either of the three anterior ones. Ten lower
labials; fifth and sixth largest. Dorsal scales in 21 to 23 rows, narrow, acute posteriorly; first lateral row
much widest. Body above, with broad, lustrous, brownish black half rings on a light yellowish ground.
The black rings six to eight scales wide in the middle, narrowing very much, or even rounded off, laterally,
sometimes not extending quite to the abdomen. Light intervals, one or two scales wide, on the vertebral
Tegion, widening to three or four times as much near the abdomen. Abdomen and lower surface of head
uniform light yellowish. Ап irregular light occipital ring. Upper labials and anterior part of head
brownish—lighter than the dark dorsal bands.—(K хмісотт.)

The specimen figured has the anterior sub-caudal scutellae entire, but this is a monstrosity,
the sub-caudal scutellae being normally all divided in this genus.
No. 4267. Matamoras, Tam. Lieut. Couch.—No. 2288. Brownsville, Tex. Van Vliet.

14. EUTAENIA PROXIMA, B. & G.
Coluber proximus, Sav, Long’s Exped. I, 1823, 187.
Eutainia proxima, В. & С. Catal. N. Am. Serp. Jan. 1853, 25.

Sr. Сн--Воду stouter than E. saurita or E. faireyi. Brown or blackish above. Three longitudinal
stripes; the dorsal ochraceous yellow or brown, the lateral greenish white or yellow on the third and
fourth rows of scales. Dorsal stripe covering one and over two half rows of scales. Lateral row of
scales usually the color of the abdomen. Total length about three and one half times that of the tail.
Dorsal rows 19.--(Кеммісотт.)

Texas.
15. EUTAENIA ORNATA, B. & G.
_ Prate ІХ.
Ешалта parietalis, В. & С. Catal. N. Am. Serp. Jan. 1858, 28. (Not Coluber parietalis, Say.)

745. Indianola, Тех. J. Н. Clark.—438. Lower Rio Grande, Тех. J. Н. Clark.—768.
Near San Antonio. Dr. Kennerly.

REPTILES. 17

16. EUTAENIA MARCIANA, B. & G.
Ешаіта marciana, В. & б. Catal. N. Am. Serpents, Jan. 1853, 36.
Sr. Сн--Неаа triangular, short, but very broad posteriorly. Nose pointed; upper labials 8; 6th
largest; "th nearly as large. Body rather stout, sub-cylindrical; tail short. Prominent color light
тозуп; а vertebral paler line and one lateral on each side on the second and third lateral rows more or
less indistinct. Three series of square black spots on each side, of about 56-60 in each series, from
occiput to anus. Sides of head black, with a crescentic patch of yellowish posterior to the labial plates.
Three and sometimes four black vitte radiating from the eye across the jaws. А double white spot with
а black margin on the suture of occipital plates.
1417. Indianola. J. Н. Clark.—1418. Eagle Pass, Tex. А. Schott.— 1419. San Pedro,
Rio Grande, Tex. J. Н. Clark.

17. NERODIA WOODHOUSII, B. & б.
Nerodia woodhousii, B. & G. Catal. N. Am. Serp. Jan. 1853, 42.

Sr. Cx.—Form of Nerodia erythrogaster, but the head broader behind and more flattened above. 95
dorsal rows, all carinated. Three rather large post-orbitals; ante-orbitals narrow; loral large. Three
series of quadrangular dark blotches on a brownish clay colored ground. The middle series separated
by narrow white lines; the lateral by intervals of the ground color wider than themselves; the three
series perfect to the head. A double yellow occipital spot. A yellow spot between the superciliary and
vertical plate. A black line indistinctly seen from the posterior point of the eye to the angle of the
mouth. Abdomen unspotted.—(Kewnnicort. )

1308. Indianola, Tex. J. H. Clark.
78. REGINA GRAHAMII, В. & 6.
Рілте ҮП, Fic. 2. Young.
Regina grahamii, В. & б. Catal. N. Am. Serpents, Зап. 1858, 47,

Sp. Сн.--ПаП dark brown, with a dorsal light brown line, margined on each side by a narrow indis-
tinct black line. A broad yellowish stripe on the first, second, and third rows, margined above with an
indistinct black line on the fourth and fifth rows, and below by a distinct narrow black line on the lower
fourth of the first lateral row and the extreme ends of the abdominal scutellae. Abdomen yellowish,
tinged posteriorly in the old by olive, with a single central row of small sub-triangular black spots ров-
teriorly, which disappear on the anterior third of the body, | and are sometimes indistinct in young speci-
mens. Dorsal rows of scales 19.—(K еммтсотт.)

1376. Rio Salado, Tex. J. H. Clark.
19. REGINA CLARKII, B. & G.
PLATE X. Adult.—PrLarE XI, Fic. 2. Young.
Regina clarkii, В. & С. Catal, М. Am. Serp. Jan. 1853, 48.
Sr. Cx —Yellowish brown above, with four longitudinal bands of deeper brown. Abdomen dull yellow,
with two clouded brown bands dotted with black. Опе ante-orbital. Dorsal rows of scales 19, all
carinated

1392. Indianola. J. Н. Clark.—1377. Indianola. Dr. Kennerly.
80. HETERODON COGNATUS, В. & 6.

Heterodon cognatus, B. & G. Catal. N. Am. Serp. Jan. 1853, 54.

Sp. Сн.--Воду shorter and stouter than in Н. platyrhinos, head strikingly larger. Vertical espe al
than occipitals. Dorsal rows of scales 23-25; outer smooth; next scarcely carinated. Scales of the

—#

18 UNITED STATES AND MEXICAN BOUNDARY.

rest with keels extending to their tips. Scales broader than in preceding. Disproportion between scales
of the back, before and behind, not conspicuous. Light chestnut, with 20 yellow blotches from head to
anus, and 9 on the tail. Beneath yellow.

1911. Indianola. J. Н. Clark.

81. HETERODON NASICUS, B. & G..
PraATE XI, Fic. 1.

Heterodon nasicus, В. & G. Stansbury’s Rep. Great Salt Lake, 1852, 352.—Is. Catal. Serp.
1853, 61.

Sr. Сн. Vertical broader than long. Rostral excessively broad and high. Azygos plate surrounded
behind and on the sides by many small plates (12-15.) Sometimes a second loral. Labials short and
excessively high. Dorsal rows of scales 23, exterior alone smooth. А dorsal series of about 50 blotches,
with four or five others on each side. Body beneath black. А narrow white line across the middle of
the superciliaries; a second behind the rostral. A broad dark patch from the eye to the angle of the
mouth, crossing the last two labials.

Fort Webster, and 1260, Sonora. J. H. Clark.—1249. Eagle Pass. A. Schott.—1262.
Copper Mines. J. H. Clark.

82. PITYOPHIS BELLONA, B. & G.

Churchillia bellona, B. & G. Stansbury's Report, 1852, 350.
Pituophis bellona, B. & G. Catal. N. Am. Serp. Jan. 1853, 66.
Pituophis affinis, Наполи, Pr. A. N. Sc. VI, 1852, 181.

Sr. Cu. —Head broad behind, tapering to the snout. Snout rather pointed, but less so than P. sayi ;
elevated. Crown flattened between the eyes and posteriorly. "Vertical plate broad anteriorly; elongated
and narrow posteriorly. Ante-orbitals two, sometimes one. Post-orbitals three or four. Frequently a supple-
mental plate before the vertical. Dorsal rows of scales 29 to 35, the seven outer rows smooth. Head spotted
with black; transverse frontal bar extending from one orbit to the other, well marked; the oblique
post-ocular vitta rather narrow. Color of the body whitish yellow. А dorsal series of 45 to 65
sub-quadrate blotches from head to anus, transversely elongated posteriorly; three or four smaller series
on each side. Тһе lateral blotches are longitudinally elongated near the head, and vertically elongated
posteriorly where they form a series of jet black vertical bands. There are 10 or 15 black bands on the

tail. Abdomen yellow, with an external series of black spots on each side.—(K ExNicorr.)

1542. 1543. "Through Texas. J. H. Clark.—1546. San Bernardino to Rio San Pedro,
Mexico. Dr. C. B. Kennerly.

83. ARIZONA! ELEGANS, Kennicott.
PLATE XIII.

Sr. Сн.-Воду rather more slender than іп Pityophis sayi апа P. bellona, and head narrower; otherwise
bearing a general resemblance in form to these and other species of Pityophis, especially in the protruding

1 GENUS Arizona, Kennicott.—Size large. Body sub-cylindrical, deeper than wide. Head ovoid
rather narrow. Snout obtusely pointed, projecting beyond the lower jaw. Eye small. Cleft of mouth
curved. Cephalic plates normal. Pre-frontals elongated longitudinally; post-frontals elongated trans-
versely. Pre-frontals extending down in front of nostrils. Rostral large, and protruding apex turned
back between pre-frontals. Nostril between two plates; anterior smallest. A narrow loral as long as
the post-frontals. One or two pre-orbitals, two post-orbitals. Dorsalscales all perfectly smooth, in about
99 to 31 rows. Post-abdominal scutella entire; sub-caudal all biped.

In its general aspect this genus somewhat resembles Pifyophis, from which it differs widely, however,
in its single pair of post-frontals, smooth scales, and different nasals, loral, pre-frontals, ёс.--(Кеккісотт.)

nmm

REPTILES. 19

and recurved nostril. The tail forms nearly one-sixth of the total length. Head depressed anteriorly,
arched, and much more elevated posteriorly, where it is not much wider than high, nor much wider than
the neck. Vertical plate sub-pentagonal, broad in front, tapering, and very acute posteriorly. Occipitals
large, perfect, longer than the vertical. Superciliaries small. Pre-frontals of greater longitudinal extent
than post-frontals, separated for more than two-thirds of their length by the apex of the nostril, the
anterior angle extending down in front of the pre-nasal to below the level of the nostril. Post-nasal
more than twice as large as pre-nasal. Loral very narrow, as long as both nasals together, and longer
than the post-frontals. One ante-orbital, sometimes a second very small one below; two post-orbitals of
about equal size. Two narrow and much elongated temporal shields just behind the post-orbitals,
entirely filling the space between the seventh upper labial and the occipital; behind this, small scale-like
temporal shields. Eight upper labials, seventh twice as large as any other. Fourteen lower labials,
seventh largest. Dorsal scales in 29 to 81 rows all perfectly smooth; central rows not much smaller;
outer row largest, but not as high as long.

Body whitish yellow above, with a dorsal series of transversely quadrate light olive brown blotches
and two smaller lateral series on each side. Abdomen uniform clear whitish. Тһе dorsal series of
blotches are indistinctly edged with blackish; they cover three or four scales longitudinally and twelve
or thirteen rows transversely, and are separated by regular intervals of one and a half scales of the
ground color. Тһе lateral blotches become more or less indistinct in age from a dark suffusion over
the ground color. Each dorsal scale occupying a dark blotch is edged with lighter. In the young, the
head above is light brown, with а blackish bar across the post-frontals and through the eyes to the
angles of the mouth; there is also a dark blotch below the eye and some smaller ones on the crown
posteriorly. In older specimens these markings become obsolete, leaving the head uniform light glossy
olive brown.—(KeEwnnicort.)

1722. Rio Grande. А. Schott.—4266. Between Arkansas and Cimarron. J. Н. Clark.

.84. SCOTOPHIS LINDHEIMERI, B. & С.

Scotophis lindheimeri, B. & С. Catal. N. Am. Serp. Jan. 1853, 14.

Sr. Сн.-- Head broader behind and more pointed on the snout than in 5. alleghaniensis; snout more
narrow and elevated. Vertical plate as broad anteriorly as long; 27 to 29 dorsal rows, central rows
distinctly carinated. А dorsal series of dark leaden brown or amber brown quadrangular blotches, with
an elongated lateral series on each side. Intermediate space brownish yellow. Abdomen nearly all
yellow.—( Кеххтсотт.

Indianola, Texas. J. H. Clark.

85. SCOTOPHIS EMORYI, В. & С.
PLATE Xil.
Scotophis emoryi, B. & С. Catal. N. Am. Serp. Jan. 1853, 151.

Sr. Сн.--Неай narrow, elongated, widening suddenly behind the eyes. Snout elongated, narrow,
elevated, and obtuse; outline anterior to the eyes sub-quadrangular. Crown flattened. Eyes very large.
Vertical plate much longer than wide, narrow posteriorly, much wider in front. Superciliaries narrow.
Loral large, trapezoidal, acutely angled behind. Погва! rows 25 to 27; carination of scales very faint,
barely perceptible on the central rows. Above ash-grey with a dorsal series of transverse brown
blotches, on each side of which are two others of smaller size; indistinct traces of a third. А frontal
brown vitta passing back through the eye and crossing the angle of the mouth on to the side of the
neck. Two blotches on the upper labials which are not margined with МасЕ.-(Кемххісотт.)

2251. Howard Springs, Texas. J. Н. Clark.—1716. Ресов to Rio Grande. Dr. C. B.
Kennerly. |

20

UNITED STATES AND MEXICAN BOUNDARY,

86. OPHIBOLUS BOYLII, B. & G.

Ophibolus boylii, B. & б. Catal. N. A. Serp. Jan. 1853, 82,
Coronella balteata, HALLOwELL, Pr. А. N. Sc. Jan. 1853, 236.

Gila desert. A. Schott.

87. OPHIBOLUS SPLENDIDUS, B. & G.
PLATE XIV.
` Ophibolus splendidus, В. & б. Catal. М. A. Serp. Jan. 1858, 83.

Sonora. J. Н. Clark.—1851. Tucson, Sonora. А. Schott.

88. OPHIBOLUS БА ҮТ, В. & G.

Coronella sayi, Нотввоок, N. Am. Herp. III, 1842, 99.
Ophibolus sayi, B. & G. Catal. N. Am. Serp. 1853, 84.

1699. Indianola, Texas. J. Н. Clark.
89. GEORGIA OBSOLETA, B. & G.
PLATE XV.
Georgia obsoleta, В. & б. Catal. N. Am. Serp. Jan. 1853, 158. (Not Coluber obsoletus, of Say.)
1862, 1864. Eagle Pass and Lower Rio Grande, Texas. А. Schott and J. Н. Clark.
90. BASCANION FLAVIVENTRIS, B. & G.

Coluber flaviventris, Sav, Long's Exped. II, 1823, 185.
Bascanion flaviventris, B. & G. Catal. N. Am. Serp. Jan. 1853, 96.

Indianola to San Antonio. J. H. Clark.

91. MASTICOPHIS SCHOTTI, B. & G.

Prate XVIII.
Masticophis scholti, В. & С. Catal. N. Am. Serp. 1853, 160.
1972. Eagle Pass, Texas. А. Schott.

92. MASTICOPHIS ORNATUS, B. & G.
Plate XVII.
Masticophis ornatus, B. & G. Catal. N. Am. Serp. Jan. 1853, 102.
1971. San Antonio to El Paso. J. H. Clark.—1970. Howard Springs, Texas. A. Schott.

93. MASTICOPHIS TESTACEUS, B. & G.

Рілте XVI.
Coluber testaceus, Sav, Long’s П, 1853, 48.
Psammophis flavigularis, Harrow. Pr. А. N. Sc. VI, 1859, 118.

Masticophis flavigularis, B. & "i Catal. N. Am. Serp. 1853, 99.

ЕЕРТШЕВ. 21

Sr. Сн.--Рогва! rows 17. Тай one-fourth the length of body. In alcohol light dull yellow, tinged
with brown above. Beneath, two longitudinal series of blotches distinct anteriorly; when the epidermis
is removed the whole animal appears of а soiled white. In life there is a tinge of rose color, and in
some specimens the whole body is said to be nearly of a brick red.

Texas generally.
1990. Indianola. А. Schott.—2002. Presidio del Norte. J. Н. Clark.—2118. Brownsville,
Texas. J. Н. Clark.
94. SALVADORA GRAHAMIAE, B. & С.
Рілте У, Ею. 2.
Salvadora qrahamic, В. & G. Catal. N. Am. Serp. Jan. 1858, 104.

2081. Sonora. J. H. Clark.—2080. Presidio del Norte. J. Н. Clark.—2082. Sonora.
A. Schott.—2083. Northern Sonora. Dr. C. B. Kennerly.

95. LEPTOPHIS MAJALIS, B. & G.

Leptophis majalis, B. & G. Catal. N. Am. Serp. Jan. 1853.
1435. Castroville, Texas. Dr. C. B. Kennerly.—Indianola, Texas. J. Н. Clark.—143.
Eagle Pass, Texas. А. Schott.

96. SONORA SEMIANNULATA, B. & G.
Рілте XIX, Fic. 3.
Sonora semiannulata, B. & G. Catal. М. Am. Serp. Jan. 1858, 117.
3109. Sonora. J. Н. Clark.
97. RHINOCHILUS LECONTII, В. & 6.
Puate ХХ.
Rhinochilus lecontii, В. & С. Catal. N. Am. Serp. Jan. 1853, 120.
2014. Ресов, Texas. А. Schott.
98. LAMPROSOMA OCCIPITALE, Hallowell.
PLATE XXI, Ею. 1.

Rhinostoma occipitale, HAutowELL, Pr. А. N. Sc. VII, June, 1854, 95.
Lamprosoma occipitale, Нацоу. Pr. А. N. Sc. VIII, Dec. 1856, 310.

Sr. Cu.—Body moderately stout, tapering slightly toward the neck and considerably toward the tail,
which is about one-sixth of the total length, slender, and narrowing suddenly at its base. pro-
portionally large, tapering posteriorly. Superciliaries scarcely two-thirds as long as the vertical.
Occipitals nearly as broad as long. Anterior edge of pre-orbitals concave, to receive the convex upper
edge of the nasal. Loral elongated; exceedingly narrow. . Orbitals small; pre-orbital quadrangular, but
little higher than wide; upper post-orbital much the largest. Upper labials eight; seventh largest. Lower
labials seven; fourth largest. Dorsal scales rather short and broad, disposed in fifteen rows; those of the
йы 2o дында high as long; the central rows not very much smaller; the first lateral row по
larger than the second and third. In the alcoholic specimen the ground color above is light greenish

-

22 UNITED STATES AND MEXICAN BOUNDARY,

yellow, tinged with dull pinkish along the vertical region; below whitish yellow, with narrow black rings
entirely around the body. Іп life, the whole ground color above may have been pinkish. Тһе black rings
are two scales wide, and separated by regular intervals of five or six scales of the ground color through-
out. Тһе first three anterior rings do not reach the abdomen, but behind this to the tip of the tail all
pass completely around the body. "They are narrowest on the first lateral rows of scales and widest on
the middle of the abdomen and vertebral region. On the head is an occipital crescentic blotch, passing
from one eye to the other back through the middle of the occipitals.—( КЕххісотт.)

The specimens described are with some hesitation referred to Lamprosoma occipitale. Dr.
Hallowell’s type of this species differs in having only transverse dorsal bands, which do not
reach the abdomen, except on the tail, in place of the perfect annulations; and these bands
are only one and one-half scales wide and separated by three and a half or four scales of the
ground color; the occipital crescentic blotch is broader, but does not extend to the eyes.
Should these characters be permanent, the specimens described above must be referred to
another species, which might with propriety be called Lamprosoma annulatum.

No. 2105-6. Colorado desert. А. Schott.

99. LAMPROSOMA EPISCOPUM, Kennicott.
PrarE VIII, Fic. 2.

Sp. Сн--Еогш tapering very little toward the neck—which is not much narrower than the head—and
moderately tapering toward the tail. The tail forms about one-fifth of the total length. Head rather
depressed; crown flattened posteriorly. Snout broad, rounded, and depressed. Vertical a third longer
than wide; scarcely tapering behind; acute posteriorly, and usually slightly concave on the sides.
Superciliaries and occipitals short and narrow. Nasal elongated; nostril very small in the centre of the
plate. Тога! elongated; not half as large as the ante-orbital, which is itself small and vertically
elongated. Post-orbitals of nearly equal size. Rostral subpentagonal; the apex acute and turned back
upon the crown, entering slightly between the pre-frontals. Seven upper labials; fourth, fifth, and sixth
largest and nearly equal in size, seventh very small. Lower labials seven; the fourth very much the
largest. Тһе dorsal scales in fifteen rows; they increase regularly in size from the central rows, which
are much the smallest, to the first lateral row, which is higher than long. Тһе color of the entire upper
parts of head and body is uniform light olive brown, tinged with green; but on close inspection each
scale is seen to be very minutely mottled with black toward the centre, and upon stretching the skin
the base of each scale is black. Тһе abdomen is uniform whitish green. Іп a specimen from Rio Seco
the exposed base of each scale is black, giving the body somewhat of an indistinctly mottled appearance
even when the skin is not stretched. Тһе colors become lighter after soaking long in alcohol, and the
black at the bases of the scales becomes more or less effaced.—( K ENNIcorr.)

2042. Eagle Pass. А. Schott.— 2045. бап Antonio to Rio Grande. Пт. Kennerly.
_ 100. DIADOPHIS REGALIS, В. 6 G.
Diadophis regalis, B. & G. Catal. N. Am. Serp. Jan. 1853, 115.

Sp. Си.—Когт stout. Head very short, broad behind. Eye very small. Vertical plate broad, tapering
posteriorly. Dorsal scales in 17 rows. Body above uniform greenish ash; beneath light yellow, with
scattered black spots. No occipital ring —(Kenntcorr.)

2062. Sonora. J. H. Clark.—2064. Eagle Springs, Texas. J. Н. Clark.

101. DIADOPHIS DOCILIS, В. 4 б.
Рілте ХХІ, Fie. 3.
Diadophis docilis, B. & б. Catal. N. Am. Serp. Jan. 1853, 114.
Sr. Сн.-Іп form, the most slender of the genus, Head rather broad behind; snout narrow; crown
arched posteriorly. Eyes small. Vertical plate pentagonal, elongated, tapering but little posteriorly.

-

REPTILES. 29

Dorsal scales proportionally small, disposed іп 17 rows, the outer row scarcely largest. Color above
nniform ash gray; beneathlight yellow, sparsely spotted all over with black. Head dark brown above;
below yellow, thickly mottled with black. As in all the western species, the color of the abdomen deepens
into reddish towards the tip of the tail. А yellowish white occipital ring 21 to 3 scales in width.—
(Кеххтсотт.)

2014. Devils river, Texas. J. Н. Clark.—2066. Tucson, Sonora. А. Schott.—2078.
Pecos to Rio Grande. Dr. C. B. R. Kennerly. |

102. TAENIOPHIS IMPERIALIS, В. & 6.
PLATES XIX, Fic. 1.

Taeniophis imperialis, (В. & С.) бівавр in Gilliss’ Chile, IT, 1855, 215. (Named, not described.)

Sr. Cu.—Form tapering anteriorly and posteriorly, Tail continuous with the body. Head propor.
tionally narrow posteriorly, and broad on the nose; snout rounded, Rostral gibbous, twice as broad as
high, the apex below the anterior frontals. Loral as high as long, and more than half as large as the
anterior frontals, which are themselves about one-third the size of the post-frontals. The vertical is pen-
tagonal, narrow, and elongated, scarcely wider anteriorly, the acute posterior point entering between
the occipitals; one ante-orbital large, vertically elongated, broader above; two post-orbitals small, upper
largest. Dorsal scales smooth, in 19 rows; central scales narrow and acute, outer rows much broader,
especially the first. Body above deep purplish black, with two dorsal stripes of yellowish brown from
head to tip of tail, and separated by a narrower vertebral line of the ground color. Head black above,
with two narrow yellow lines from the nostrils to the sides of the occiput, crossing the upper angle of
the orbit. Upper labials and under part of head yellowish, minutely mottled with black. Ground color
of the back extending on to the ends of the abdominal scutellae. Middle of abdomen uniform light
yellowish in the alcoholic specimen; said to be bright red in life --(Кеххісотт.)

2060. Brownsville, Texas. Capt. Van Vliet.

103. TANTILLA GRACILIS, B. & G.
Tantilla gracilis, В. & С. Catal. N. Am. Serp. Jan. 1858, 132.
2040. Indianola, Texas. J. Н. Clark.— 2038. Eagle Pass, Texas. А. Schott.

104. TOLUCA! LINEATA, Kennicott.
PLATT XXI, Fic. 2

Sp. Сн.-- Воду exceedingly stout. Tail about one-sixth of the total length. Head short, wedge-shaped,
scarcely wider than the neck. Snout much depressed, acutely pointed, and projecting beyond the lower
jaw. Crown arched throughout. Vertical plate very large, sub-hexagonal, the anterior extremity
elongated іп a narrow process to the anterior frontals, thus widely separating the post-frontals. Оссірі-
tals nearly as broad as long. Superciliaries small. Rostral proportionally large, the apex obtusely
pointed, and its centre forming the acute point of the nose. Nasal pentagonal, much elongated, pointed
posteriorly. One small sub-pentagonal ante-orbital as long as high; two post-orbitals, upper slightly
largest; seven upper labials, first much smaller than the second and succeeding ones; lower labials, six.
Dorsal scales in 17 rows. Тһе scales of the first lateral rows are higher than long; those of the central
rows narrower; the outer row largest. Color above uniform light brownish ash, with three imperfect
longitudinal blackish stripes} each on a single row of scales.

1 Genus Тошса, Kennicott.—Size small. Body very stout, سوه‎ deeper than wide. Тай
short and thick. Head short and broad, wedge-shaped, almost continuous with the body. Snout pointed
and projecting. Cephalic plates normal. Vertical large, sub-hexagonal, the elongated anterior angle
separating the post-frontals. Occipitals shorter than vertical. Rostral turned back upon the crown,
and occupying the entire point of nose. А single elongated nasal; no loral. Dorsal scales smooth.
Post-abdominal scutella divided; sub-caudal all divided.

24 UNITED STATES AND MEXICAN BOUNDARY.

The vertebral stripe the most distinct; the lateral stripes obsolete on the fourth lateral row on each
side. The stripes are formed by scales with the bases black, and the tips of the ashy ground color; the
scales involved by the vertebral stripe have their tips even lighter than the ground color. Each dorsal
scale appears, on close examination, to be minutely mottled with blackish, and when the skin is stretched
the covered base of each scale is seen to be black. Head brownish ash, minutely mottled with blackish;
labials lighter. Abdomen uniform greyish white.—( Кеххтсотт.)

2103. Valley of Mexico. Dr. Т. Potts.
105. БЕХА DULCIS, B. & 6.
Rena dulcis, В. & G. Catal. N. А. Serp. Jan. 1853, 143.
San Pedro to Comanche Springs. 4. Н. Clark.

BATRACHIA.

105. BUFO AMERICANUS, Leconte.
Рілте XX XIX, Fics. 1—4.

Bufo americanus, (Lec. mss ) Ногввоок, N. Am. Негр. V, 1842, 17; pl. iv.

Брес. Снлв.-Неай above, grooved; a ridge from the snout to the occiput, hence at almost right angle to
the tympanum. The ridge from either side is slightly diverging from before backwards. Skin upon
the head thick, and adhering to the skull. Parotids sub-reniform. Tympanum well developed. A sub-
gular vocal sac in the male sex. Limbs large and stout. First finger larger than the second. A large
carpal corneous disk, and a small опе. No membranous fold at the inner lower edge of the tarsus.
Toes semi-palmated. Two metatarsal tubercles, the internal large and spade-shaped, the external smal
Large papilla on the back. Greenish or yellowish brown above, with scattered black

A vertebral fuscous vitta or streak. Two black patches under the eye, occasionally
Beneath dirty yellowish.—( GIRARD.)

and sub-conical,
patches or spots.
spotted about the nostrils and over the jaws.

Atlantic States.

106. BUFO PUNCTATUS, B. & G.
Prate XXXIX, 1:08 5—7.

Bufo punctatus, В. & б. Pr. А. N. Sc. VI, Oct. 1852, 173.
Брес. Онав.--Т/ррег surface of the head flattened, with а sub-orbicular row of granules. Tip of the
A blunt granular ridge along the sides of the upper surface. Parotid glands rounded
or sub-triangular. Tympanum well developed and eventually elliptical. Eyeslarge. Tongue elliptical.
irst finger longer than the second. Two carpal disks. Мо membranous fold along the inner edge of the
tarsus. Тоев very slightly webbed at the base. Upper surface of the body covered with minute granules.
Two small metatarsal tubercles. Above yellowish brown, with minute black dots over the head, body,
and limbs. Granules reddish. Beneath yellowish white, with scattered minute blackish dots under the

head and over the chest.—( GIRARD. )

Western Texas. J. H. Clark.

snout prominent.

107. BUFO NEBULIFER, Grd.
Рілте XL, Fics. 1—4.

Bufo granulosus, В. & G. Pr. A. N. Sc. VI, Oct. 1852, 173.
Bufo nebulifer, бівавр, Pr. А. N. Sc. VII, Мау, 1854, 81.
Spec. Cnan.—Upper surface of head deeply excavated or concave; concavity bordered with conspicuous
ridges. Skin very thin and firmly adhering to.the skull. Parotid small; eyes and tympanum rather
large. Tongue moderate, broadest posteriorly. Upper jaw emarginated. Inner finger much longer than
the second, which is longer. than the fourth. Two well developed carpal disks. No membranous fold
along the tarsus. Toes semipalmated; two metatarsal tubercles. Palm of hands and sole of feet
tuberculous. Yellowish brown with a dorsal broad streak of the same tint. An interocular black bar on i
either side of the dorsal streak extending to the whole length of the body. Sides =. пра рагі y
of limbs barred. Beneath unicolor in the qae spotted in the سو« روي‎ заг

Wo i

26 1 UNITED STATES AND MEXICAN BOUNDARY.

Quite abundant along the shores of the Gulf of Mexico, north and south of the Rio Grande
del Norte, (Rio Bravo.) :

108. BUFO SPECIOSUS, Ста.
Ррате XL, Fics. 5—10.

Bufo speciosus, Girarp, Pr. А. N. Sc. ҮП, Мау, 1854, 86.

Spec. Снлв.— Неа moderate; its upper surface smooth and even, else showing slight traces of ridges
or crests. Snout sub-truncated and rounded; nostrils sub-terminal. Mouth large; upper jaw slightly
emarginated. Tongue small, elongated, free posteriorly upon the fourth of its length. A sub-gular
vocal bladder in the male sex. Tympanum of medium size. Parotids sub-rhomboid, of stoutish appear-
ance. Limbs of moderate development. First finger much longer than the second, which is equal to
the fourth. А large sub-circular carpal disk. Toes semipalmated. Two metatarsal, spade-shaped pro-
cesses; the innermost being much the largest. A membranous fold at the inner lower edge of the tarsus.
Skin above covered with papillae of moderate development, and with small warts beneath. Color above
greenish brown, maculated; no dorsal lighter vitta or streak. Beneath greenish or yellowish white,
unicolor.—( GIRARD. )

Lower Rio Grande.
109. BUFO ALVARIUS, Grd.
PEATE XLI, Fics. 1—6.

Spec. Cuar.—Upper surface of head nearly plane upon its middle region; orbits bordered by a low
and rounded off ridge; its skin being thin and adhering to the skull. Parotids well developed and sub-
reniform. Eyes and tympanum rather large also. Tongue elongated, broadest posteriorly. Upper jaw
emarginated. Two large carpal callosities. А membranous fold at the inner lower edge of the tarsus.
Toes palmated; two metatarsal tubercles. Palms and soles coarsely granular. Upper surface of body
exhibiting numerous glandular tubercles; large pustular swelling upon the thighs. Color uniformly

dark green.—(Grnanp.)

Valley of Gila and Colorado. А. Schott.

110. BUFO HALOPHILA, B. & G. -
е Ргате XLI, Fics. 1—12. |
Bufo halophila, В. & G. Pr. А. N. бс. VI, Feb. 1853, 301.

Spec. Cnan.— Upper surface of head without either crests or grooves. Skin thick and adhering to the
skull. Snout rounded. Parotids of medium size. Eyes moderate. Tympanum small. Tongue lanceolated;
broadest posteriorly. Upper jaw emarginated. Inner finger longer than the second. Two carpal disks-
A membranous fold along the inner edge of Ше tarsus. Toes semipalmated; two metatarsal tubercles.
A narrow yellowish dorsal streak or vitta. Ground color greenish yellow, with numerous black spots

and dots distributed all over the upper surface and sides of the body, head, and limbs. Beneath unicolor,
of a dingy yellow.—( Garn.)

Coast of California. |
111. BUFO INSIDIOR, Grd.
| Рілте XLI, Fies. 13—18.
Bufo insidior, Giram, Pr. А. N. Se. VII, May, 1854, 88.
БРЕС, Cnan.—Upper gurface of head plane and smooth. Snout sub-acute, protruding. Mouth moderate;
upper jaw slightly emarginated. Tongue elongated, tapering towards both extremities. Tympanum
inconspicuous. Parotids large and elongated, obliquely situated across the shoulders. Limbs moderate

REPTILES. : 2d

First finger equal to the second in length. А carpal disk and a tubercle. Тоев slightly webbed at their
base. Two metatarsal tubercles. Мо membranous fold at the inner lower edge of the tarsus. Skin
papillous above, warty beneath. Above of a bluish slate tint with black markings. Beneath unicolor,
of a dingy yellow tint —(Girarp.)

Chihuahua and Sonora.
112. BUFO WOODHOUSII, Girard.

Bufo dorsalis, HaLLoweLL, Pr. А. N. Sc.'VI, 1852, 181. (Not of Spix.)
Bufo woodhousii, Girarp, Pr. А. N. Sc. VII, May, 1854, 86.

Sonora.
118; BUFO COGNATUS, Бау.

Bufo cognatus, Say, Long’s Exped. II, 1823, 190.

Техав.

114. BUFO DEBILIS, Girard.
Bufo debilis, Ginanp, Рг. А. N. Sc. VII, May, 1854, 81.

Lower Rio Grande.

115. RANA CATESBIANA, Shaw.
Bull Frog.

Rana catesbiana, нау, Gen. Zool. Amphibia, 1802, 106; pl. xxxiii.
Rana pipiens, Harran, Sill. Am. Jour. X, 1825, 69.--Ногввоок, N. Am. Herp. IV, 1849, 11;
р1. хуйі. (Not of Linnaeus.)

San Анты Texas. Пт. Kennerly.

116. RANA MONTEZUMAE, Baird:
PLATE XXXVI, Fics. 1—6.
. Rana montezumae, Влтвр, Pr. А. N. Se. УП, April, 1854, 61.

Sp. Сн.--Неай as wide as long. Body generally smooth, except pustulation on the sides and sometimes
above. Хо fold of skin, either on the sides or around the tympanum. Tympanum about size of eye; but
little variation with sexes. Large vocal vesicles on each side behind jaws. Tongue broad, cornua short.
Palatine protuberances close together. Тоев not webbed beyond middle of last phalanges on the external
sides. Color purplish olive above, grayish below, with crowded spots or vermiculations of whitish all
over the body. In young specimens, rounded, areolated, dark blotches оп the back and fore leg. Size,
that of Rana pipiens of Holbrook. (В. catesbiana.)

ity of Mexico. Major W. Rich.
117. RANA BERLANDIERI, Baird. ;
Рілте XXXVI, Fies, 7—10.

Sr. Cx.—Size large. Body stout, robust. Eye distant not quite 1} times its diameter from tip of
snout, and contained 23 times in the length of jaw from rictus. Tympanum two-thirds the diameter of
the eye. А vocal vesicle on each side of the head. А glandular fold on each side the jaw, and another
one broad. and depressed on each side of the body. Between these is one pair er along the coccyx;

28 UNITED STATES AND MEXICAN BOUNDARY.

several pairs more interrupted anterior to it. Skin corrugated and irregular, quite pustular in some
specimens. Feet webbed from the bulb of the toes; excavated on the inner edges; last joint of longest
free. Femur about half the length of body, shorter than the tibia.

Color above greenish olive, with distant sub-circular blotches of darker, scarcely areolated in the
preserved specimens. Beneath yellowish white, with brown mottlings on the throat. Ап indistinct
whitish line on the side of the head, especially in the young; the lateral ridge bronzed.

Southern Texas generally.

118. RANA AREOLATA, B. & G.
Prate XXXVI, Fies. 11, 12.
Rana areolata, В. & б. Pr. А. М. Sc. VI, Oct. 1852, 173.
Indianola. J. Н. Clark.

119. SCAPHIOPUS COUCHII, Baird.
Prate XXXV, Fics. 1—6.
Scaphiopus couchii, Ba, Pr. А. N. Sc. УП, April, 1854, 62.

Sr. Сн. Outer toe but little shorter than the third. Hand nearly as long as the forearm. Above
grayish ash in alcohol, with dark markings. A dark line down the back from each orbit. Beneath white;
length about one inch or more. Older specimens apparently more greenish.

Lower Rio Grande. Lieutenant Couch.

120. ACRIS CREPITANS, Baird.
- РРАТЕ XXXVII, Fics. 14—11.

Hylodes gryllus, DEK Av, N. Y. Zool. III, 1842, 10; pl. xxii. (Not of Leconte.)
Acris crepitans, Batrp, Pr. А. N. Sc. VII, April, 1854, 59.

Sr. Cu.—Brownish above. The median region of head and body above bright green; a dark triangle
between the eyes. Three oblique blotches on the sides, nearly equidistant; the first behind the eye, the
last on the flanks and running up on the back; all usually margined with lighter. А narrow white line
from the eye to the arm. Beneath yellowish white. Inferior face of thigh plain. Tibia a little more than
half the length of the body; foot rather smaller. Head rather obtuse, scarcely longer than broad. Web
of hind foot extending to the penultimate articulation of the fourth toe. -

Indianola, Texas. J. Н. Clark.—New Braunfels. Е. Lindheimer.

121. HELOECETES СБАВКЦ, Baird.
PLATE XXXVII. Fics. 4—9. :
Heloecetes clarkii, Bap, Pr. А. N. Sc. ҮП, April, 1854, 60.

Бр. Cu.—Snout acute, projecting. Extremities somewhat dilated. Tibia half the distance between
eye and anus. Foot but little longer, not nearly half the length of body. Above grayish brown ог ah,
with distinct large circular blotches. А dark band from snout through eye and tympanum down the
sides, and a whitish line on the side of jaw. Body about one inch long

Indianola, Texas. J. Н. Clark.

122. HYLA SEMIFASCIATA, HALLOW.
Hyla semifasciatum, Harrow. Pr. А. N. Sc. VIII, Dec. 1856, 306.
Indianola. J. Н. Clark.

REPTILES. 29

123. HYLA EXIMIA, Ватво.
PLATE XXXVIII, Fras; 8—10.

Hyla eximia, Bam, Pr. А. N. Sc. VII, April, 1854, 61.

Sr. Сн.- Smooth above. Tibia not half the total length of body. Hind foot not longer than arm from
elbow. Bluish above, with two dark longitudinal stripes; beneath white. А dark band from the eye
along the sides, margined above and below by a white line, the latter reaching only to the arm, behind
which the outline of the dark band is indistinct. Legs not banded. Body about an inch long.

City of Mexico. Major Rich.
124. НҮҺА VANVLIETII, BAIRD.
PLATE XXXVIII, FIGS. 1-3.
Hyla vanvlietii, Bamon, Pr. А. N. Sc. УП, April, 1854, 61. Е
Sr. Сн.--Хеагіу smooth above. Tympanum nearly as large as the eye. Tibia half as long as the
body, longer than arm from elbow, which in turn exceeds the.foot. Ash gray or olive, with an irregular
cruciform dorsal blotch. А black spot on the side above the foreleg. А white spot under thé eye,

Thigh and leg with three transverse bands each. "Their inner surfaces (when flexed) scarcely reticulated
but spotted with white upon a darker ground. Inside of tibia uncolored. Body two inches long.

Brownsville, Texas. Captain Van Vliet.
125. HYLA AFFINIS, BAIRD.
Pirate XXXVIII, Fics. 4-1.

Hyla affinis, Влтвр, Pr. A. N. Sc. VII, April, 1854, 61.

Sr. Сн. —Войу rough. ` Tympanum two-thirds the size of eye. Tibia not quite half the length of the
body, but reaching more than half way from anus to centre of eyes. Color ash grey or green, with
numerous rounded dorsal blotches. Three transverse bands on each thigh and leg. No vermiculation
on anterior and posterior faces of hind legs, nor on lower part of sides. А light spot under the eye.
Web of hand extending only to the third joint of the second finger. Arm Їгош elbow less than tibia,
but longer than hind foot. About 11 inches long.

Northern Sonora. J. Н. Clark.
126. AMBLYSTOMA PROSERPINA, B. & G.
PLATE XXXV, Fics. 7—14.

Amblystoma proserpina, B. & С. Pr. A. N. Sc. VI, Oct. 1852, 113.

Salado river, Texas.
197. AMBLYSTOMA TEXANUM, BAIRD.
PLATE XXXV, Fio. 15.

? Salamandra texana, Маттнез, Allg. Deut. Nat. Zeitung, I, 1855, 266.

Lower Rio Grande.
198. SIREN LACERTINA, L.

Lower Rio Grande, Texas.

се au

5
jeden

сш "E
one

E NE,

ALPHABETICAL INDEX.

E

Amblystoma proserpina...... ....
| anum

Ancistrodon contortrix ............
Anniella pulchra
Anolis carolinensis وم‎ 02.1020. рата в ar 2252;
Anota me’callii
Arizona .elégáns.:-.22-.3.24-..4c6-

Aspidonectes emoryii

Baseanion flaviventris

Batrachia
Ва tert

э..........

а f

Bufo alvarius 287092

americanus

cognatus
5

dorsalis CE

Ж
woodhousii

Callisaurus ventralis

Chelonura temminckii . ...... ...
Chelydra lacertina
Chrysemys oregonensis
Chure bell
Cnemidophorus gracilis
grahamii ......
gularis
а dece ашса
O E NNE ух
marmoratus
octolineatus .....
perplexus TUE
сн
undulatus .....

Coluber flaviventris
. testaceus

Cophosaurus texanus
Copperhead

ы. эээ. «-----«----е» ..............

ву
Crotalophorus consors
edwar

sii

Crotalus atrox

ceraste

confluentus

molossus

ornatus

: tigris
Crotaphytus б0йагів...-----.----.--------24---%%-%4
dorsalis
gambelii

Взе соло lo. 9. с сене هره دعس‎
reticulatus .....
wislizenii

Diadophis docilis

Тервав све аа E

Dipsas septentrionalis
oraalia

Dinsnsanurna d

Dipsosaurus
Doliosaurus me’callii ...
modestus .....

Elaps tener
Ж.

Elgaria nobilis

mobilensis

oregonensis
Euphryne obesa
Eutaenia marciana
orna

proxima

Georgia obsoleta......
Gerrhonotus infernalis
nobili

x
olivaceus

webbii

pher
Gypochelys Inborüna ناه ده‎ Захиа мийн ал

Heloecetes clarkii ....
Heloderma horridum

: nasicus
Holbrookia affinis

“

32 ALPHABETICAL INDEX,
Page.
Holbrookia арргохітапв....----.-................. 8 Rana montezumae ........ "e
СЪ u сыл دوه‎ 8 Batleinake ы шаах واک‎ ада жоғы аба
ргоршана .2.....:--- Ө НЕШЕ ОКИ MM a аа аа ы
ЇЕИиЕЄНӨ ассын 8 ДҮРМИЙГ ens она пс ара parece d
Homalosaurus ventralia лэх» «улаа Тун их алин 8 Hong т Ра. ышы Т АКЛЫ ТЫЫНЫ
HES 8019818 داد‎ ух нэмн пи ай a 99 Bissau Inh. Ы БАСЫ وام ده د‎ U اه مه‎
ары ОСОЛ Lour Аа E ин 99 Біпповиипаовсірдеів....-.--...--......-.........-
Е ООА аа a ea аа 98
GUI С S эсэн مد په‎ P oui е 99 BN E свае „7га со ана банка maire
Seaphiopus соцеМїї.........-----------------------
Kinosternon Bonoriente.....-... Sse. ед وو‎ баци 3 Sceloporus HERR i Liza е ада sey cone Musa
CODSODHIUE са бадава ва есе
Lamprosaurus ШИЛ а د‎ равай 11 hii
Lamprosoma episcopum. J... .--....------.-----.-- 21 0901963309033 cio аа слан a raSr
oecipitale...... a 91 ЖИЕ C Ерец о аа wean de
Leptophis majalis..... ...... 21 marmoratus
ن9‎ 001025 letótila «ones oce a rape 13 ornatus хаан
рошвейн .....-...--. еск бе кейе ал»
Masticophis flavigularis 90 MON ATO зы деда мал та Баян Que d cu
ornatus 90 spinosus оса همه خد‎ sda wep лээ эмэг.
schottii 20 thayeri
testaceus 20 orquatus....
3806660113 Mes ——————Á—— J5- i: Boitoa Interii E a aaa n
Seotóphis ешетүй.25-5>-:.-52-..2-.....---ғ----.---
Nerodia woodhousii ....... ........ 7 17 eimeri wee ae
; Трой ОНГИЙН ETE TO EET TT T T EE T TT TU TERI аба
Ophibolus Боўііі.... 20 вэ shelled беде. сака ва ues ыы СЕ р зарана
вауі 30.] PRESUL АВИВ. оно IRR kr чаек
руме 22 ST k аа RR ue _ 90 TEES таг cil ساسا‎ LL а
Ophidia 14 | Stenodactylus уагіерайів...........................
Phrynosoma cornutum....... 9 Taeniophis imperialis . dus se au ама 22: SEP ewe
MORD 4 iav хээ тухалж Бак dem 10 ҚҰМЫН ы асуды LE d ы
ПРВИ аса зле план مه متوو‎ 9> |. Тарира Балаш 2. син дына
терііө...-....------.................. 9 cis. ро уни هرو‎ ы
Phyllodactylus tuberculosus 12. | Тӛуговегһат sonorietse ..----..--.-...--.-.-,-«-.
БЫ: 601888 د‎ 2. 55554-42 нади ae шесі 18 UBI, ро ЕЛІ лб» тен Ades ыы wei kd gd sek
опа ----- ---. 18 "БООВ: превео د‎ E وم حدم د وغامه ردد‎
Pityophis БеПопа.................................. 18 | Toxicophis pugnax............
Platythyra flavescens .... ыз. 3 | Trachemys elegans
Бимен ен. 19
obsoletus. ns- sesa +--+ +--+ oe аана наса a T Чао, осе аи акелу = жср aa ыры
telragrüummus - 2. ео ае ER Re 19 RABEL SERE RLS
о ма с مهد‎ а аа 20 07868 с
Ptychemys 0011010888 -is sraoin غه‎ а 3 MS UNIT YET оона е اوو‎
stansburiana......
Нана аген се с аа مون‎ У 98 symmetrica
даи ыы асы RM E ы бр E TEM 97
catesbiana .................. 97 | Xerobates berlandieri دت لادی دو‎

TS مسب‎ тарнага

1

a‏ ف

LIST OF PLATES.

PEATE I. Crotalus atrox, В. & С.

PLATE’ II. Crotalus molossus, B. & С.

PLATE III. Crotalus cerastes, Hallow.

ГҮ. Crotalus tigris, Kennicott.‏ دال

Prate У. Fic. 1.—Crotalophorus edwardsii, В. & G.
Fic. 2.—Salvadora grahamiae, В. & G.

Prate VI. Toxicophis pugnax, B. & G.

Pirate VII.——Fic. 1.—LHlaps tener, В. & С. |
Fic. 2.— Regina grahamit, В. & С. (young.)

Prae УШ.—— Е. 1.—Dipsas septentrionalis, Kenn. | :
Fic. 9. —Lamprosoma episcopum, Kennicott.

Prats IX. Ешаета ornata, В. & С.
PILATE X. Regina clarkii, B. & б.
PEATE XI. Ета. 1.— Heterodon nasicus, В. & G.

Fic. 2. — Regina clarkii, B. & б. (young.)

Pram XII.——Scotophis emoryi, В. & С.

Plate XII. Arizona, elegans, Kennicott.

Plate ХГУ. — —Ophibolus splendidus, B. & С.

Рглте XV.— Georgia obsoleta, B. & б.

Prate XVI.. Masticophis testaceus, B. & С.

Prare XVII.—— Masticophis ornatus, B. & С.

Рглте XVI.— Masticophis schotti, В. & б.

. PLATE XIX... Fic. 1.— Taeniophis imperialis, B. & С.

Fic. 2.—Diadophis regalis, В. & С.
Fic. 3.—Sonora semiannulata, В. & С.
PLATE XX. Rhinocheilus lecontii, B. & С.
Prate XXI.. Fic. 1.— Lamprosoma occipitale, Hallow.
Ғіс. 2.— Toluca lineata, Kennicott.
Fic. 3.—Diadophis docilis, В. & G.
Prae XXII.——Skulls of serpents—
Еіс. 1.—Salvadora grahamiae, В. « G.
Fra. 2.—Dipsas septentrionalis, Kenn.
Fic. 3.--Ешаепіа saurita, В. & С.
Fic. 4.—Eutaenia marctana, В. & ©. .
Еіс. 5.— Bascanion constrictor, В. & G.
Fic. 6.— Georgia obsoleta, В. & G.
Fic. T.—Masticophis testaceus, В. & С.
Рглте XXIII, Fics. 1—8. Phyllodactylus tuberculosus, Wieg. Хо. 3208.—Fig. 1, animal; fig. 2,
head from side; fig. 3, head from above; fig. 4, head from below; fig. 5, inguinal region;
fig. 6, under surface of left hand; fig. 7, toe from above, showing the short claw; fig. 8,
skin of back. АП magnified except fig. 1. Female.

54 LIST OF PLATES,

Fics. 9— 18. Stenodactylus variegatus, Baird. Female. No. 3217.—Figs. 10, 11,
12, head from different views; fig. 13, inguinal region; fig. 14, a hind toe; and
fig. 16, a finger from below, (not quite accurately represented;) fig. 15, hand from
below; fig. 17, skin of back; and 18, skin of belly. All magnified except fig. 9.

1168. 19—97. Stenodactylus variegatus, Baird. Male. Хо. 3213— References ав
above; figure of skin of belly wanting. The under surfaces of the toes and fingers,
figs. 24, 26, not quite accurate. АП magnified except fig. 19.

Prate XXIV, Fries. 1-10. — Gerrhonotus webbii, Baird. Young.—Fig. 1, animal; figs. 2, 3, 4,
views of head; fig. 5, upper surface of left hand. fig. 6, tip of a finger, highly magni-
fied; fig. 7, upper surface of left hind foot; fig. 8. portion of belly; fig. 9, portion of
the side, showing the lateral fold. All magnified except fig. 1.

Етсѕ. 11—19. Stenodactylus variegatus, Baird. Young.—Fig. 11, animal; figs. 12,

, 13, 14, views of head; fig. 15, left hand from above; fig. 16, {їр of finger; fig. 11

left hind foot from above; fig. 18, portion of back; fig. 19, portion of belly. АП
magnified except fig. 11.

Fics. 20—28. Plestiodon guttulatus, Hallowell. Young.—Fig. 20, animal; figs. 21,
22, 23, views of head; fig. 24, left hand from above; fig. 25, left foot from above;
fig. 26, its longest toe, much magnified; fig. 27, scales of back; and fig. 28, of
belly. Fig. 20, natural size of specimen; the others magnified.

Fics. 29—37. Sphaeriodactylus notatus, Baird.—Fig. 29, animal; figs. 30, 31, 32,
views of the head; fig. 33, left hand from above; fig. 34, a digit from below; fig.
35, left foot from above; fig. 36, scales of back; fig. 37, scales of belly. Fig.
29, natural size; the others magnified.

Prate XXV, Fics. 1—8. Gerrhonotus nobilis, Baird.—Fig. 1, animal; fig. 2, head from above;
fig. 3, eyelids; fig. 4, head and arm from below; fig. 5, anal region; fig. 6, scales of
back; fig. t scales of side; fig. 8, scales of belly. Figs. 3, 6, Т, and 8, magnified.

1108. 9—16. — Plestiodon obsoletus, B. & G.—Fig. 9, animal; fig. 10, head from above;
fig. 11, eyelids; fig. 12, (right hand side,) head from below; fig. 12, (left hand side,)
arm from below; fig. 14, inguinal region and hind leg from below; fig. 15, scales of

| back; fig. 16, scales of belly. Figs. 11, 15, 16, magnified.

PrarE XXVI, 11608. 1—10. Heloderma horridum, Wiegm. No. 2791.—Fig. 1, animal; fig.
2, head from below; fig. 3, auditory aperture; fig. 4, anal region; fig. 5, fore finger from
the side; fig. 6, fore finger from below; fig. 7, hind toe from шө side; fig. 8, hind toe
from below; fig. 9, skin of back; fig. 10, skin of belly.

Prate XXVII, Fics. 1—12. Euphryne obesus, Baird.—Fig. 1, animal; fig. 2, head from
above; fig. 3, head from below; fig. 4, anal region; fig. 5, fore finger from below; fig.
6, fore finger from the side; fig. 7, hind toe from below; fig. 8, hind toe from the side.

Piate XXVIII.—Fics. 1—3. Phrynosoma regale, Girard.

Fics. 4—6. — Doliosaurus w callii, Girard.

Prate XXIX.—Fies. 1—3. Sceloporus poinsettii, B. & G.

1108. 4— 6. ?Sceloporus spinosus, Wiegm.

Prate XXX.—Fics. 1—2. — Holbrookia texana, B. & б. Male.

Fics. 3—7. Holbrookia texana, B. & G. Female: —Fig. 3, animal; fig. 4, head from

above; fig. 5, palpebral region; fig. 6, кан surface of body; fig. Т, dorsal жилээ
much мах

LIST OF PLATES. 35

Puare XXXI, Fics. 1—8. Crotaphylus wislizenit, B. & С. Хо. 2685.—Fig. 1, animal; fig.
2, head from above; fig. 3, head from the side; fig. 4, inferior surface of body; fig.
5, а fore finger from the side; fig. 6, a hind toe from the side; fig. 1, dorsal scales; fig.
8, a femoral pore. All magnified, except figs. 1 and 4.

Prate ХХХІІ, Fics. 1-6. Cnemidophorus grahamii, B. & б. Хо. 3046b.—Fig. 1, animal;
fig. 2, head from above; fig. 3, palpebral region; fig. 4, under surface of body; fig. 5
scales of back; fig. 6, femoral pore; figs. 3, 5, and 6 magnified; .

Fics. T—13. Dipsosaurus dorsalis, Hallow. No. 2699.—Fig. Т, animal; fig. 8, side
of head; fig. 9, head from above; fig. 10, head from beneath; fig. 11, anal region,
under surface of hind leg; fig. 12, side view of a fore finger; fig. 13, side view of
a hind toe. АП magnified except fig. 1. ў

Puare XXXIII, Fics. 1—8. Cnemidophorus tigris, B. & б. No. 3061. California.—Fig. 1,
animal; fig. 2, head from above; fig. 3, head from the side; fig. 4, under surface of
body; fig. 5, side view of a fore finger; fig. 6, side view of a hind toe; fig. 7, scales of
side; fig. 8, a femoral pore. All magnified, except fig. 1. :

N. B. The division of thé loral plate into two, as seen in fig. 3, is unusual, the narrow

linear one superposed on the larger being almost pecuhar to the specimen figured.

PLATE XXXIV, Fics. 1—6. Cnemidophorus gularis, B. & -G.— References as in preceding

cases, fig. 3 being the palpebral region, and fig. 6 the scales » sides and belly.

Fics. 7—14. Cnemidophorus gracilis,.B. & б. Хо. 3034.

PLATE XXXV, Fics. 1-6. Scaphiopus couchii, Baird. Adult.

Fics. 7—14. Amblystoma proserpina, В. & G.—Fig. 7, animal; figs. 8, 9, 10, views
of head; fig. 11, open mouth, showing the tongue; fig. 12, roof of mouth magnified;
fig. 13, palm of hand; fig. 14, sole of foot.

Еіс. 15. Amblystoma texana, Baird.

Prate XXXVI, Fics. 1-4. Rana montezumae, Baird. е.

Fras. 5, 6. Вапа montezumae, Baird. Young.

Frcs. 7—10. Rana berlandieri, Baird.

Fias. 11, 12. Rana areolata, B. & С.

-Puate XXXVII, Fics. 1—3. Batrachyla longipes, Baird. Mexico.

Fics. 4-9. He loecetes clarkii, Baird.

Ғісв. 10—13. Hylarana fusca, Baird.

1168. 14--17. Acris acheta, Baird.

Рілте XXXVIII, Fics. 1-3. Hyla vanvlietii, Baird.

Fics. 4—7. Hyla affinis, Baird.

Fics. 8—10. Hyla eximia, Baird.

Fics. 11—13. Hyla vociferans, Baird.

PLATE XXXIX, Fies. 1-4. Bufo americanus, Lec.

Fies. 5—9. Bufo punctatus, B. & G.

Prate XL, Fics. 1—4. Bufo nebulifer, Girard.

Fies. 5—11. Bufo speciosus, Girard.

PLATE XLI, Fies. 1—6. Bufo alvarius, Girard.

Fics. 7—12. Bufo halophila, В. & С.

_ Fics, 13—18. Bufo insidior, Girard.

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BOUNDARY SURVEY,

UNDER THE ORDER OF ,

МЕСТ. COL. W. H. EMORY,

MAJOR FIRST CAVALRY, AND UNITED STATES COMMISSIONER.

ICHTHYOLOGY
OF THE BOUNDARY,

BY

CHARLES GIRARD, M. D.

1——i

AE‏ ا و
Pot Cary roa a ap чк‏

зана,

موه اه ورو

“Far: Гуен

ICHTHYOLOGY.

Family PERCIDAE.
DIOPLITES NUECENSIS, Grd.
Trout or River Bass.

PLATE I.

Брес. Cuar.—Body elongated, sub-fusiform. Head constituting a little less than the third of the entire length. Posterior
extremity of maxillary extending to a vertical line drawn posteriorly to the orbit. Scales on the cheeks nearly equal in size to
those on the gill covers. Origin of ventrals placed posteriorly to the Бизе of the pectorals. Upper regions reddish brown,

maculated. A lateral dark band. Inferior regions whitish, unicolor.
Syn.— Grystes nuecensis, В. & С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 25.

This species is more closely related to D. fasciatus than to D. salmoides, and probably
identical with Grystes nobilis, Agass. At any rate the latter has greater affinities with D.
fasciatus than with D. salmoides, the latter being restricted to its proper limits.

The body is proportionally more elongated than in D. fasciatus, resembling more in that
respect D. salmoides, It is compressed and sub-fusiform when seen in profile. The greatest
depth is somewhat less than the fourth of the total length, in which the head enters a little less
than three times. The mouth is more deeply cleft than in any other of the known species of
the genus, and its gape is, as usual, oblique upwards, owing to the constant protrusion of the
lower jaw beyond the upper, which it does very prominently in this species. The posterior
extremity of the maxillary is very much dilated, extending to a vertical line drawn considerably
back of the whole orbit. The tongue is large and stout at its base, thinning and tapering
towards its apex, which is broadly rounded ; it is smooth anteriorly, being provided posteriorly
and upon its middle with a narrow band of velvet-like teeth. Both nostrils are nearer the
anterior rim of the orbit than the extremity of the snout; the anterior one is a little smaller
than the posterior, and placed more outwardly with reference to the middle line of the snout.
The eye is of moderate development, sub-circular in shape, and reaching the summit of the
cranium ; its diameter enters about six times and a half in the length of the side of the head:
twice in advance of the anterior rim of the orbit. The opercular apparatus is perfectly smooth
and deprived of either spines or serratures. The scales upon the cheeks are but slightly smaller
than those covering the opercular pieces. The gill openings are wide and continuous under the
throat.

4 UNITED STATES AND MEXICAN BOUNDARY.

The base of the first or spiny dorsal is longer than that of the first, but the fin itself is
lower and more arched in its outline. "The first and second spines are shorter than the third,
which is the highest, the remaining ones diminishing gradually posteriorly. Тһе tenth spine,
by its position, belongs rather to the second than the first dorsal. The second dorsal is higher
than long, sub-trapezoid ; its upper edge being but slightly convex, and the posterior rays
almost as high as the anterior ones. Тһе posterior margin of the caudal is sub-crescentic or
sub-concave ; the fin itself is contained five times and a half in the total length. The origin
of the anal corresponds to a vertical line intersecting the anterior third of the second dorsal;
its base extends a little further back than that of the latter, although the tips of the posterior
rays of both fins are nearly even, the anal being not quite so deep as the second dorsal is high;
its whole base, including the three small and slender spines at its anterior margin, is shorter
than that of the second dorsal. Тһе origin of the ventrals corresponds to a vertical line drawn
immediately behind the base of the pectorals. Тһе fins themselves are broad and short, since
their posterior extremity does not reach the vent which is situated a little way in advance of the
anterior margin of the anal fin, and under a vertical line drawn between the two dorsal fins.
The pectorals are of moderate development, not extending quite as far back as the ventrals.

BE КИ УВ ЮЖ 18; ЦП; C4 ,5,85, LO; VI, 5; Р 15. (Rio Со.)
вест гара 18; 8 на, 12:04 1,9,8,1,3: Ү1,5:Р 14. (Rie Blanco.)

The scales are of moderate development, sub-oblique, deeper than long, provided with
radiating grooves upon their anterior section only, and pectinated posteriorly. Тһе pectinations
of the scales of the dorsal region are either obsolete or else deciduous, and easily removed with
the epidermis. Ава whole the fish has а rather smooth appearance, reminding us more of a
trout than а perch were it not for its anterior spiny dorsal fin. From twenty-nine to thirty
longitudinal rows of scales may be counted upon the line of greatest depth, nineteen below
and nine above Ше lateral line. The scales under the throat are quite reduced in size; those
on the cheeks being nearly as large as on the opercle. Minute scales may be observed upon the
caudal fin to almost three-fourths of the length of its rays, and a few scattered ones upon
the base of the second dorsal. Тһе lateral line itself, from the upper region of the gill covers,
isslightly агеһей upwards until under the second dorsal fin, hence runs nearly straightway
along the middle of the peduncle of the tail to the base of the caudal fin.

The upper regions are reddish brown, of a more or less deep hue, and maculated with dark
brown or black, whilst the inferior regions are whitish or yellowish, and unicolor. А lateral,
more or less interrupted, dark band may be traced from the black patch at the posterior margin
of the opercle, to the base of the caudal fin. Three obsolete streaks may be seen upon the
cheeks diverging from the orbit. Тһе fins are unicolor, except the second dorsal, which exhibits
pà longitudinal bars upon its base; the upper ones are greyish olive, the lower ones yellowish
olive.

Plate I, fig. 1, represents Dioplites nuecensis, size of life; fig. 2, is а scale from the dorsal
region ; fig. 3, a scale from the lateral line ; and, fig. 4, a us from the abdominal region.

ICHTHYOLOGY. 5

List of specimens.

Catal.| No. of | Age. Locality. When collected. Whence obtained. Orig. Nature of
No. spec, 0 specimen,
|

388 1 Adult... Rio Eno, Vox, 1252-2222 1851 Col. J. D. Graham Alcoholic...
389 Ж rien ы ree Rio Nueces, Tex 1851 do do

390 | Ker Live Oak creek, Tex........ 1851 do do

891 E ашиг Turkey creek, Tex. ........ 1851 do do

392 6 Young -| Мо Leona, Tex 1851 do do

393 £ ао Bm 0608 (pega sec 1851 йо do

394 Bc aruis. Техав 1851 йо йо

395 Бо [бызаа San Juan river, М. Leon.... 1853 Lieut. D. М, Couch .... do

503 1 Young -| Rio Sabinal, Texas Кот, 1854 | Maj. Emory .......... 00:7 71:2 200005552.
504 4 .j|5.do.-.i| Diy creek; Тех: бо. Баба Nov., 1854 do 55 — 21:005...
505 1 --90----| San Pedro creek, Tex....... Nov., 1854 do MIB шй. д T
506 1 1.-д0---- Minneville river, Tex....... Хоу., 1854 йо Ба dus Os a

CALLIURUS LONGULUS, Grd.
Prats IV, Fras. 1—4.

Брес. Cuar.—Mouth moderate; gape oblique upwards. Posterior extremity of maxillary extending to a vertical line
intersecting the pupil. Eyes moderate. Insertion of ventrals situated opposite the inferior edge of the base of the pectorals,
and posteriorly to the origin of the dorsa!; their tips extending to the vent. Scales moderate. Reddish brown above ;
greyish beneath. Soft portion of dorsal and anal fins provided with a black patch.

Бум. —Ротойз longulus, В. & С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 391; and, in Marcy’s Expl. Red river of
La. 1853, 245, pl. xii.
Bryttus longulus, В. & G. in Proc. Acad. Nat. бе. Philad. VII, 1854, 25.
This species is described, illustrated, and compared to its congeners in the ‘‘ Ichthyology of

the U. S. P. В. В. Explorations and Surveys."

List of specimens.
Catal. Хо. of | Age. Locality. When Whence obtained. | Orig. | Natureof| Collected by—
collected. No. | specimen.

No. | spec.

1851 Col. J. D. Graham....| 6 | Alcoholic.| John Н. СІагк......

405 2 Adult. Rio Cibolo, Техав.........
1854 Maj. Emory do Dr. C. B. Kennerly.

406 4 |..4о..! Minneville Rio, Texas.....

1. POMOTIS SPECIOSUS, В.& 6.

Prate IV, Fies. 5—8. .

Брес. Снав.- Воду su-elliptical in profile. Head small ; snout bluntly sub-conical Mouth small ; او تم‎ 5 Т
maxillary extending to the anterior rim of theorbit. Inferior edge of preorbital and limb of preopercle finely serrated. А Auricular |
flap small. Spinous portion of dorsal fin elevated, Апа! spines well developed. Caudal emarginated . пе brown, lighter
beneath. Young transversely banded. Fins greyish or yellowish ; a black patch upon the dorsal. ша

Svx.— Pomotis speciosus, В. & С. in Proc. Acad. Nat, Sc. Philad. УП, 1854, 24.

6 UNITED STATES AND MEXICAN BOUNDARY.

Тһе greatest depth is equal to half the length, the caudal fin excluded. Тһе head constitutes
less than the fourth of the total length, and the caudal fin about the fifth. Тһе eye is sub-
circular, its diameter entering four times and a half in the length of the side of the head. Тһе
inferior edge of the preorbital is finely serrated, as well as the edge of the convexity of the
ргеоретсіе. А vertical line drawn from the origin of the dorsal fin meets the insertion of the
ventrals and passes behind the base of the pectorals. The tips of the ventrals overlap the vent
and reach the origin of the anal. Тһе extremities of the pectorals are nearly even with the
tips of the ventrals. Тһе posterior margin of the caudal is but slightly emarginated. Тһе
soft portion of the dorsal fin is nearly equal to that of the anal; the outline alone varying
somewhat. Тһе vent is situated opposite the eighth dorsal spine.

ВА ОСТ, 1,8; VI; b; Е 12.

The scales are well developed, and, as usual, deeper than long, posteriorly ciliated or
pectinated, and anteriorly furrowed. Fourteen longitudinal series may be counted upon the
line of greatest depth below the lateral line, and six above it, making in all twenty-one series.
The lateral itself is composed of from forty to forty-three scales.

The color is reddish brown, lighter beneath than above. The young exhibit numerous
transverse bands of brown or black, which give way to а uniform tint as they grow older. Тһе
fins are yellowish or greyish and unicolor, except the dorsal, which is provided posteriorly
with a large black patch. Тһе anal and ventrals are, generally speaking, of a greyish hue.

Plate IV, fig. 5, represents Pomotis speciosus, size of life ; fig. 6 is a scale from the dorsal
region ; fig. T, a scale from the lateral line; and, fig. 8, a scale from the abdominal región.

List of specimens.
| | | |
Catal.|No. of | Age. Locality. When | Whence obtained. | Orig. | Nature of Collected by—
No. | spec. | collected. No. | specimen.
| | |
| |
439 3 Адай. Brownsville, Texas ....... 1852 Capt. Van Vliet...... 1&9 | Alcoholic. Capt. Van Vliet.....
434 | 94 Young Devil's river, Texas....... 1854 | Maj. Emory ..40....| Dr. C. B. Kennerly..
435 3 |..do..| Cadereita, New Leon...... 1853 D. N. Couch DE dg. бопе. oe en ©
482 5 |..do..| Brownsville, Texas ....... 1852 Capt. Van Vliet | do Capt. Van Vliet....

2. POMOTIS HEROS, B. & G.
Рімте II, Fras. 1—4.
Spec. Снав.--Неай, mouth, and eye larger than їп P. speciosus. Edge of preopercle inconspicuously serrated. — Pectorals

projecting beyond the tips of ventrals ; anal fin provided occasionally with a black patch, as well as the dorsal.
Srn.—Pomotis heros, B. & С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 95

With the general physiognomy of P. speciosus, this species differs, however, from the one
just mentioned, by a proportionally larger head, hence a larger eye and а larger mouth. The
posterior extremity of the maxillary extends a little beyond the anterior rim of the orbit. The
edge of the preopercle is but inconspicuously if at all serrated, апа the opercular flap of but
moderate development.

The head constitutes about the fourth of the total length, and the diameter of the eye enters
a little short of four times in the length of the side of the head. Тһе nape is more or less
convex, and the interocular region depressed. Five rows of scales may be counted upon the

ICHTHYOLOGY. Ч

cheeks beneath the eye. The pectoral fins are sub-lanceolated ; their extremities extending
beyond the tips of ventrals and the anterior margin of the anal fin. The ventrals themselves
overlap the vent and reach the origin of the anal. Тһе origin of the dorsal fin is opposite the
base of the pectorals, and, consequently, situated in advance of the insertion of the ventrals.
The scales are large and finely serrated upon their posterior margin. The radiating furrows of
the anterior section are quite numerous. The posterior margin of the caudal is more deeply
emarginated than in P. speciosus.
Br, VI; V; D Хола A11, 11503; 455/541, Qu V 8, 5288,

The scales are large and finely pectinated upon their posterior margin. They appear
proportionally deeper than in Р. speciosus. Small and polymorphie scales may be traced along
the base of the caudal fin and soft portion of the dorsal and anal, ав is the case also in P.
speciosus and most species of the genus.

The color is reddish brown, sometimes blackish brown. The auricular flap is provided with
a light postero-inferior margin. The tint upon the sides of the head is uniform with that of
the sides of the body. Тһе dorsal is provided posteriorly with a dark patch or blotch. А black
patch шау occasionally be observed at the posterior margin of the anal fin also. Тһе young
are unicolor.

Plate II, fig. 1, represents Pomotis heros, size of life; fig. 2 is a scale from the dorsal region ;
fig. 3, a scale from the lateral line ; and, fig. 4, a scale from the abdominal region.,

List of specimens.

Catal. |No. of | Age. Locality. When | Whence obtained. | Orig. | Nature of Collected by—
No. | spec. collected. No. |specimen.
438 4 jAdult.| Rio Cibolo, Texas 1851 Col.J. D. Graham Alcoholic.) Jno. Н. Clark.......
440 8 |Young| Dry creek, near Victoria, Texa| 1854 Maj. Emory......| 54 |....do....| Dr. C. B. Kennerly.
441 1 do do 1854 do 56 К-до
449 | 7 |..do do | 1854 | do BT do
443 | 12 |..до.. Rio San Juan and near Cade- 1859 D; N.GCouch,..;. 15& 19). ...do. .. . D. N. Couch.......

3. POMOTIS AQUILENSIS, В. & G.
Prate ІП, Fras. 1—8.

Брес. Снав.- Воду sub-elliptical in profile. Head moderate ; snout bluntly sub-conical. Mouth moderate ; posteri
extremity of maxillary extending to a line intersecting the anterior rim of the orbit. Eye moderate. Edge of Bae
slightly dentieulated ог serrated. Auricular flap elongated and well developed. Spinous portion of dorsal fin elevated or else.
of medium height. Апа! spines well developed. Extremities of pectorals not extending as far back as those of the ventrals
which overlap the vent and reach the anterior margin of the anal fin. Reddish brown ; fins greyish olive, unicolor ; dorsal and
anal provided with a black patch. i

Syn.—Pomotis aquilensis, В. & С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 357. М
Pomotis nefastus, В. & С. іп Proc. Acad. Nat. Sc. Philad. VII, 1854, 24. =

Resembles very much Р. speciosus in general appearance, having sometimes, in common with
the latter, the spinous portion of its dorsal fin quite elevated, it being then higher, or equal at
the least, to the soft portion, which occupies the two-fifths of the base. Generally, however, it š
is of but moderate height. Тһе caudal fin, which constitutes about the fifth of the total length, |
is more emarginated posteriorly than in P. speciosus.

8 | UNITED STATES AND MEXICAN BOUNDARY.

Тһе body, when viewed in profile, is more elliptical, more elongated proportionally, than in
P. speciosus. "The head constitutes rather more than the third of the length, the caudal fin
being excluded, The eye is of medium size and sub-circular ; its diameter entering three times
and a half in the length of the side of the head, less than once in advance of its anterior rim.
Тһе scales on the cheeks are more numerous than in P. speciosus, and a good deal smaller than
on the opercle. The mouth is larger than in the latter mentioned species; the posterior
extremity of the maxillary extending to a vertical line intersecting the anterior rim of the
orbit. The opercular flap is elongated, sometimes considerably developed, being prolonged
posteriorly and inclining downwards without tapering. This feature is quite peculiar to this
species.

The ventrals and pectorals are elongated, the latter not extending quite as far back as the
former, which, however, overlap the vent and reach the origin of the anal fin.

Br Viti; Кое Ц; АТН 04, ,158,T7,1,3; VL, 5; P М.

The scales in the first variety (figs. 6—8) are as deep as long upon their posterior margin,
which is sub-truncated ; they are narrower posteriorly and rounded. In the second variety
(figs. 2—4) they do not taper off posteriorly. The radiating furrows and the pectinations are
numerous, each upon their respective section.

The ground color, as preserved in alcohol, is uniform reddish brown ; the base of the ventrals,
anal, and dorsal exhibiting a large, sometimes diffused, black patch.

This is as polymorphic a species as P. fallax ; two of its extreme forms are represented on
plate ПІ; fig. 5 being the one first described as Р. aquilensis, and fig. 1 ав Р. nefastus. They
are both figured size of life.

List of specimens.
Catal. |No.of| Age. Locality. When Whence obtained. | Orig. | Nature of Collected by—

No. | spec. collected No. | specimen.

446 1 | Young. | Eagle Pass 1853 Maj. Emory Alcoholic.| A. Schott

447 1 |...do...| San Felipe, Texas.......| 1851 Col. 7. D. Graham. ...|..... |....do....| Jno. Н. Clark.....-
448 э Adult. Rio Cibolo, Texas ....... 1851 do. do do. ..
449 | 10 | Young. | Rio Nueces, Texas......| 1851 49 do do ..
450 | 24 |...do...| Rio Sabinal, Texas......| 1854 Маў. Emory..........| 62 |....4о....! Dr. C. B. Kennerly .
451 12 са. НОЕ гъсто ЦО Е АНА, 1854 do EEE 61 do do roa

4. POMOTIS FALLAX, B. & G.
Pram II, Fras. 5—8, & Prarg ПІ, Fres. 9—12.

Spec. Снав.--Войу sub-cirenlar or sub-elliptical ; head moderate; snout bluntly sub-conical. Mouth large ; posterior
extremity of maxillary extending to the anterior rim of the pupil. Eye moderate. Edge of preopercle not crenated. Auricular
flap very large. Spinous portion of dorsal of medium height, its origin situated opposite the base of the pectorals ; caudal
emarginated posteriorly. Blackish or reddish brown, lighter beneath than above.
confluent into irregular lines. А black spot upon the base of the dorsal £n.

Sfx. кузеу ми, В. & G. in Proc, Acad. Nat. Sc. Philad. VII, 1854, 94,
ifrons, B. & G. in Proc. Acad. Nat. Sc. Philad. ҮП, 1854, 94.

А comparative study of a larger number of specimens than we had heretofore has satisfied us
that P. convexifrons was identical with P. fallax. The latter appears to be one of the most

Sides of head with bluish spots, sometimes

!
b
+
й

ICHTHYOLOGY. 9

polymorphic species of the genus, and we have deemed it expedient to give figures and outlines
of the most prominent forms on Plate X, of the U. S. В. В. Expl. and Surveys, as a more sure
guide to future researches.

It is, therefore, difficult to take into account the form of the body in a specific point of view.
Generally speaking, however, it is sub-circular or sub-elliptical ; the head being of but moderate
development compared to the other species, constituting the third of the length, the caudal fin
excluded. The snout is bluntly sub-conical. The mouth itself is proportionally large, obliquely
directed upwards. The posterior extremity of the maxillary extends to a vertical line inter-
secting the anterior rim of the pupil. The eye is of moderate development, circular in form ; its
diameter entering about four times in the length of the side of the head, or else a little less.
The edge of the preopercle is not crenated. The opercular appendage, on the other hand, is
very large when fully developed, reaching even abnormal proportions. The origin of the
dorsal fin is situated opposite the upper edge of the base of the pectoral fins ; its spinous portion
is of medium height, with its outline more or less arched, it being subjected to some variations ;
it is always lower than the soft portion. The caudal is moderately emarginated posteriorly.
The tip of the ventrals overlap the vent and reach the anterior margin of the anal. The external
soft ray becomes filamentous in the adult and then projects beyond the anterior margin of the
latter mentioned fin. The pectorals are rather broad, and their extremity does not extend as
far back as the tip of the ventrals. The posterior extremities of both dorsal and anal fins fall
evenly with the same vertical line.

DA, il AIM, 9:0 3: 81,1, 2; V1, 6; P 14. (Ена creek)
A, И; 11,9; .3,1,8, 7, 1,2; 1,5; . 18. (Вю Cibolo. =F опт

The scales are of moderate development, sub-hemispherical, rounded posteriorly, superiorly,
and inferiorly, and truncated or sub-truncated anteriorly ; always deeper than long. The pec-
tinations are often carried away with the epidermis.

The color is either blackish or reddish brown, lighter beneath than above. The sides of the
head exhibit bluish spots, which are sometimes confluent into irregular lines. The opercular
flap is margined by a narrow light filet, whilst a black spot is occasionally observed upon the
base of the soft portion of the dorsal fin posteriorly.

Plate II, fig. 5, represents Pomotis fallax, size of life; fig. 6 isa scale from the dorsal region;
fig. Т, a scale from the lateral line ; and fig. 8, a scale from the abdominal region.

Plate III, fig. 9, represents, size of life, the variety which we have formerly described as a
species under the name of Pomotis convexifrons; fig. 10 is a scale from the dorsal region ; fig.
11, a scale from the lateral line ; and fig. 12, a scale from the abdominal region.

List of specimens.

Catal. No. of Age. Locality. When сеј- Whence obtained. | Orig’l| Nature of Collected by—
No. | spec. lected. No. | specimen.
457 2 mes Rio Cibolo, Техав....... 1851 Col. J. D. Graham Alcoholic.| Jno. Н. Clark........
458 1 ..4о.. Elm Creek, Техаз...... 1851 do .do >.
459 | 5 Young Rio Salado, Техав....... 1851 кад до doce roni
460 6 ..д.. Live Oak creek, Texas... 1854 Major Emory...... ... 64 |....4о....! Dr. C. B. Кеппегіу....
461 5 |..do. : бап Редго сгеек, Техав.. 1854 „до 59 до 4 |

2—

10 UNITED STATES AND MEXICAN BOUNDARY.

Amongst other fresh water percoids collected by the Commission we have further to mention
Calliurus melanops, Grd., as having been collected in 1854 by Dr. Kennerly, in the Dry creek
Texas, and in San Pedro creek, Texas.

Of the marine tribe of the same family specimens of Centropomus undecimalis, Cuv. & VAL.,
were collected by Jno. H. Clark, near the mouth of the Rio Grande del Norte (Rio Bravo).

Family ETHEOSTOMIDAE.

Exclusively limited to the fresh waters of the northern portion of the western hemisphere, the
fishes of this family have not yet been made the subject of any researches beyond the establish-
ment of some genera and the naming of sundry species. Their intimate structure, by which
alone their natural affinities can be traced, is left for future investigations, which we hope, ere
long, to be able to undertake. Тһе materials on hand are already very numerous.

PILEOMA CARBONARIA, B. & G.

Рілте VIII, Fres. 10—13.

Брес. Снак.—Воду elongated, sub-fusiform, compressed ; peduncle of the tail slightly contracted upon its middle. Head
constitution about the fifth of the total length ; snout sub-conical ; posterior extremity of maxillary extending to a vertical line
drawn in advance of the anterior rim of the orbit. The eye is well developed, sub-circular in shape, its diameter being contained
four times and a half in the length of the side of the head. Тһе anterior dorsal is longer than high, and approximates closely
the second dorsal, which is somewhat higher than the first, and likewise longer than high. Two short spines may be observed at
the anterior margin of the anal fin. The posterior margin of the caudalis sub-concave. Тһе ventrals, inserted somewhat іп
advance of the anterior margin of the dorsal, are sub-lanceolated and their extremities extend further back than those of the

0 Тһе pectorals themselves are rather broad and sub-elliptical.

Syn.—Pileoma carbonaria, B. & С. in Proc. Acad. Nat, Sc. Philad. VI, 1853, 387.

Тһе scales are nearly as long as deep, anteriorly sub-truncated with radiating furrows, whilst

their posterior edge is rounded and provided with largely developed spines or pectinations.
Ве. VI: VIE; В. ХУ); Во ЗУБ: P 18.

The ground color is reddish yellow with transverse bars of black. А black spot may be seen
at the base of the caudal, which is barred. The base of the dorsals, the anal, and the ventrals,
is black also. Тһе pectorals being unicolor.

Plate VIII, fig. 10, represents Pileoma carbonaria, size of life; fig. 11 is a scale from the
dorsal region ; fig. 12, а scale from the lateral line; and, fig. 13, a scale from the abdominal
region.

List of specimens.

Catal. | No. of | Age. Locality. When col. Whence obtained. Nature of Collected by—
No. | spec. lected. | specimen.
740 7 Adult. | Rio Salado, Texas......| 1851 Col. J. D. Graham ... Alcoholic. Jno. Н. СІагЕ.......

-1
+
—
-

...do .. Rie Medina, Texas...... 1851

749 1 |...40... San Pedro creek, Texas..| 1854 Major Emory |

40 Dr. С. B. Kennerly.---

|
|

ICHTHYOLOGY. 11

POECILICHTHYS LEPIDUS, Grd.
Ртлте VIII, Fres. 14—17.

Брес. Cnan.—Body d, rather thick upon its middle region, and attenuated towards both extremities. The head is sub-
conical, forming about the fourth of the entire length. "The jaws are equal ; the mouth being moderate, the posterior extremity
of the maxillary reaching a vertical line intersecting the anterior rim of the orbit. "The eye is large and circular, its diameter
entering about four times in the length of the side of the head. Тһе first dorsalfin is quite low and longer than the second. Тһе

ventrals and the anal being rather small.
Syn.—Boleosoma lepida, B. & G. in Proc. Acad. Nat. Sc. Philad. УІ, 1853, 388.

The color is reddish brown with indistinct transverse blackish bands or bars; the base of the
scales is black also. "The dorsals and caudal are mottled or barred, whilst the € fins
are unicolor. А vertically elongated spot may be observed beneath the eye.

DIX11; АШ,6; 08,1, 0,5, 1,2; V L O4 P.

Plate VIII, fig. 14, represents Pwcilichthys lepidus, size of life; fig. 15 is a front view of the
open mouth, showing the maxillar teeth ; fig. 16, an outline of the fish seen from above ; and, fig.
17, a section of the body across the line of greatest depth.

List of specimens.

Catal. | No. of | Age. Locality. When col-| Whence obtained, Nature of Collected by—
No. spec. lected. specimen.
144 8 Adult. | Rio Leona, Техав....... 1851 Col. J. D. Graham...| Alcoholic | Jno. Н. Clark........

Family ВАТВАСНТЛАЕ,

Several specimens of toad fishes were collected at Indianola, Texas, in 1851, by John H.
Clark, under Col. J. D. Graham. Ав far ав a hasty examination of them would permit, we
have identified the species with Batrachus tau, Осу. & Var. Hist. nat. Poiss. XII, 1837, 478.

Family SCIAENIDAE.

The want of space forbids us working up descriptions of the following species of this family :

1. Отоштнов мотноз, Holbr.—Specimens collected at Brazos Santiago, Texas, by Lieutenant
D. N. Couch.

2. Letostomus OBLIQUUS, DeKay.—Specimens collected at Brazos Santiago, Texas, by С.
Wiirdemann, and at Indianola, by John Н. Clark, under Colonel J. D. Graham.

3. Homoprion LANCEOLATUS, Holbr.—Specimens collected at St. Joseph's Island, Texas, Бу ©.
Wiirdemann.

4. Homoprion xANTHURUS, Holbr.—Specimens collected at the Brazos, by John Н. Clark,
under Major Emory, and at St. Joseph's Island, by G. Würdemann.

5. бохорох AwTILLANUS, Cuv. & Val.—Specimens collected at Brazos Santiago, Texas, by С.
Würdemann.

6. Ровохтав Fasctatus, Lacép.—Specimens collected at Brazos Santiago, Texas, by G.
Wiirdemann. |

Т. Saraus ovis, Cuv. & Val.—Specimens collected at Indianola, Texas, by John Н. Clark,
under Colonel Graham ; at New Orleans, by Lieutenant Couch; at the Brazos, by John H.
Clark, under Major Emory, and by G. Würdemann; also at Indianola, Texas, by Dr. C. B.
Kennerly.

12 UNITED STATES AND MEXICAN BOUNDARY.

OTOLITHUS DRUMMONDI, Richards.

Drummond's Weak Fish.
Pram VI.

Брес. Снав.--Неай constituting the fourth of the entire length ; the body being gracefully elongated and fusiform in its profile.
Тһе posterior extremity of the maxillary extends to a vertical line drawn across the posterior rim of the orbit. "The eye is of
medium size, sub-elliptical ; its longitudinal diameter entering about seven times in the length of the side of the head. The
posterior margin of the caudal is rounded in the young and sub-truncated in the adult, obscurely trilobed, arising from the fact
that the central rays of that fin are somewhat longer than those of the middle of either lobe.

Syn.—Otolithus drummondi, Васнаврз. Faun. Вог. Amer. ІП, 1836, 70.—DeKay, N. Y. Faun. IV, 1842, 72.—SronER,
Synops. 1846, 66.

The scales are of but moderate development, very finely pectinated upon their posterior section,
and provided with diverging furrows upon their anterior section. "The dorsal region is dark or
greyish brown, with small, rounded, blackish brown spots above the lateral line and on the
second dorsal and caudal; much more numerous in the young than in the old. Тһе sides of
the head and body, as well as the abdomen, exhibit a silvery tint. The anal fin is greyish ;
the pectorals and ventrals yellowish.

ВТУ P کل‎ Зи нЕ 19:6 25 8, 7,1, 8: У 1,5; P 16,

There are two canine teeth to the upper jaw in the majority of the specimens which we have
examined, and we are satisfied that when one only is observed the other was accidentally broken.

Plate VI, fig. 1, represents Otolithus drummondi, reduced in size from a specimen nearly
fifteen inches in total length ; fig 2 із a scale from the dorsal region; fig. 3, a scale from the
lateral line; and fig. 4, a scale from the abdominal region.

List of specimens.

Catal. No. of | Age. Locality. When col'td.| Whence obtained. | Nature of Collected by—
No. | врес. specimen.
|

614 | 1 Адаһ. Indianola, Tex:s ....... 1851 Col. J. D. Graham ..| Alcoholic.| John H. Clark ..
615 | 1 о 1853 Major Emory do do. .
616] 1 |.....| Brazos 1854 do do....| Dr. C. В. Кеппегіу.....»
617 2 |Young| Brazos Santiago ........ 1853 С. Würdemann......|....do....| С. Würdemann..........
618| 1 Айш New Orleans, La ....... 1853 | D. N. Couch do....

| | D: N, Couch сее cae
AMBLODON NEGLECTUS, Grd.
Prats У, Fres. 6—10.

Spec. Cuar.—Profile of the head sloping evenly from the occiput to the snout, which је sub-conical and rounded. Posterior
extremity of maxillar bone extending to a vertical line which would intersect the middle of the pupil, Extremities of ventral
fins projecting somewhat beyond those of the pectorals and reaching the vent. Second anal spine very stout. Caudal fin
posteriorly convex. Upper regions reddish brown ; sides and belly silvery. Fins unicolor. Dorsals and caudal greyish olive ;
anal, ventrals, and pectorals yellowish.

This species differ from A. grunniens, its nearest relative, by a more pointed and conical
snout, a larger mouth, and a somewhat larger eye. The first anal spine is stouter, and the
second spine of the same fin both stouter and longer. The even profile of the upper surface of
the head contributes to a great extent in giving it its peculiar physiognomy, which, when once
compared to that of A. grunniens, is never to be mistaken. The second dorsal is not quite во
high as in the latter mentioned species, and composed of but thirty rays. Тһе other fins
exhibit no material differences in the number of their soft rays. We observe but six branchi-
ostegal rays.

"қилы ИН IE ына. нана.

ICHTHYOLOGY. 13

Br. VI: VI; D اك زک‎ JA 15/8570 9 1775 5, 9; ۷ E65 P 16
In the absence of authentic specimens of A. concinnus, Ag., and 4. lineatus, Ag., we are not
prepared to point out the affinities of these species with the one here referred to.
Plate V, fig. 6, represents Amblodon neglectus, size of life; fig. Т is the head seen from
beneath ; fig. 8, a scale from the dorsal region; fig. 9, a scale from the lateral line; and fig
10, a scale from the abdominal region.

List of specimens.

Catal.|No. of Locality. When ойбай Whence obtained. | Nature of Collected by—
No. | spec specimen.
636 1 | Mouth of Rio Grande del 1853 Major Emory Alcoholic.| John Н. Clark
Norte (Rio Bravo).
637 | 94 | Matamoras (Tamaulipas)...| 1853 D. N. Couch | do L. 13011811016 ух ул 00s va

UMBRINA PHALAENA, Grd.
PrarE V, Fres. 1-5.

Брес. Cuar.—Head contained a little less than four times in the total length, pre-opercular spines inconspicuous.
Posterior extremity of maxillary corresponding to a vertical line drawn across the anterior rim of the pupil. Outer row of
pre-maxillar teeth very conspicuous. Longitudinal diameter of the eye entering six times and a half in the length of the side
of the head : twice in advance of the anterior rim of the orbit. Origin of ventral fins opposite the third dorsal spine. Origin
of anal situated under the eighth articulated ray of the second dorsal. Caudal fin slightly concave posteriorly, constituting
about the sixth of the total length.

The last anal ray being bifurcated from its very base, otherwise there would be but seven soft
rays to that fin. The scales are much deeper than long, finely pectinated upon their posterior
section, and exhibiting radiating furrows upon their anterior section alone.

Br. VIE: VIE; DX,I,29; ALS USLE Бо, ка, 21.

Upper regions greyish brown, obscurely clouded ; inferior regions of a dirty white hue, with
minute black specks. Fins olivaceous ; pectorals, anal, and caudal speckled; dorsals and
ventrals unicolor, except the first dorsal, which is blackish upon its upper margin.

Plate V, fig. 1, represents Umbrina phalaena, size of life; fig. 2 is the head viewed from
beneath, showing the outline of the mouth; fig. 3, а scale from the dorsal region; fig. 4, а
scale from the lateral line; and fig. 5, a scale from the abdominal region.

List of specimens.

Catal. No. of| Age. Locality. When collected.| Whence obtained. | Nature of Collected by—
No. | spec. specimen.
619 ` 1 |Adult.| Indianola, Техав........ 1851 Col. 7. D. Graham .. Alcoholic. John Н. Clark
620 4 Young) Brazos Santiago ........ 1853 G. Würdemann do С. Würdemann ........

MICROPOGON UNDULATUS, Cuv. & Val.

Grunter and Croaker.

Pra VII.
Spec. Снав. The pu depth under the first dorsal fin is a little less than the fourth of the total length, in which the
head enters three and t ters of a time. The posterior extremity of the maxillary is even with a vertical line drawn

in advance of the pupil. "The eye is кіре; ; its longitudinal diameter entering about five times in the. length of the si
of the head. The caudal fin constitutes the fifth of the total length, in which the base of the anal enters twelve times. Te.
base of the first dorsal is a little more than the half of that of the second dorsal.

14 UNITED STATES AND MEXICAN BOUNDARY.

5үм.--Регса undulata, LINN. Syst. Nat. I, 483; &, ed. ХШа, Gmelini, 1, ш, 1788, 1312.
Micropogon undulatus, Cuv. & Var. Hist. nat. Poiss. V, 1830, 219.--ПеКат, New Y. Fauna IV, 1842, 84.—
STORER, Synops. 1846, 73.—Horsn. Ichth. of South Са. 1855, 145 ; pl. xxi, fig. 1.

A vertical line dropped from the origin of the first dorsal intersects the posterior edge of the
opercle, and hence passes in advance of the base of the pectoral fins. Тһе latter are more
elongated than the ventrals.

БТ MISI ВВ A IL 82 Об, 18, 1,4; VI 5; P 17.

“Тһе ground color is silvery, greyish along the dorsal region, with oblique blackish bands
extending somewhat beyond the lateral line, whilst the sides of the head, the remaining portion
of the flanks and the belly, are of a brilliant lustre. Тһе second dorsal exhibits one or two
longitudinal series of dark spots between the rays. Тһе dorsal bands themselves are the result
of series of spots.

Plate VII, fig. 1, represents Micropogon undulatus, size of life; fig. 2, the head from beneath
to show the mouth; fig. 3 is a scale from the dorsal region; fig. 4, а scale from the lateral
line; and fig. 5, a scale from the abdominaJ region.

List of specimens.

| |
Catal. | No.of} Age. Locality. When | Whence obtained. | Nature of Collected by—
collected. | specimen. |

626 1 Adult. Mouth of Rio Grande del Norte (Rio 1853 Major Emory..... Alcoholic. Jno. Н. Clark....

Bravo). |
627 | 1 ...... Indianola, Texas 1854 do do.... Dr. C.B.Kennerly
698 | 1 |.....| Galveston, Texas 1853 | Lieut. Whipple dide] d
629 1 ...... St. Joseph's Island, Texas 1853 С. Würdemann...|....do... 4 С. Wiirdemann...

|

JOHNIUS OCELLATUS, Grd.
Spotted Bass.
Puate VIII, Fras. 1—4.

Бес. Снав.--Тһе head constitutes about the fourth of the length, in which the caudal fin itself enters nearly six times. The
greatest depth, under the anterior margin of the first dorsal fin, is contained four times and a half in the length. The mouth
is large ; its gape nearly horizontal; the posterior extremity of the maxillary extending toa vertical line drawn across the
posterior rim of the orbit. The eye is sub-circular ; its horizontal diameter entering six times and a half in the length of the
side of the head. A vertical line dropped from the origin of the first dorsal passes immediately behind the base of the pectorals
and intersects the base of the first soft ray of the ventrals.

Syn.—Perca ocellata, Linn. Syst. Nat. І, 483: &, ed. XIIIa, I, ііі, 1788, 1313. —Suaw, Gen. Zool. ГУ, 1800, 550.
Sciaena imberbis, Мітсн. in Trans. Lit. and Philos. Soc. New Y. I, 1815, 411.
Corvina ocellata, Cuv. & Var. Hist. nat. Poiss. У, 1830, 134; pl. eviii—DeKay, М. Y. Fauna ТУ, 1842, 75; pl.
xxi, fig. 6.—Srorer, Synops. 1846, 67-Ноъвв. Ichth. of South Ca. 1855, 149; pl. xxi, би. 2.

The pectorals are nearly equal to the ventrals in length. Тһе base of the anal fin is con-
tained about eleven times in the total length ; its exterior margin is slightly concave. The
base of the second dorsal is twice that of the first.

~ Br. ҮП: ҮП; D X, 1, 25; АП,8; 08,1,8,7,1,2; У 1,5; P ۰

е color is silvery ; the dorsal region bluish or greyish ; the lower part of the flanks and
abdomen lighter ; a jet black spot at the base of the upper lobe of the caudal fin.

Plate VIII, fig. 1, represents Johnius ocellatus, somewhat reduced in size; fig. 2 is a scale

from the dorsal region; fig. 3, a scale from the lateral line ; and, fig. 4, a scale from the
abdominal region.

|
|

ICHTHYOLOGY, 15

List of specimens.

Catal. | No.of} Age. Locality. When сој-| Whence obtained. | Nature of Collected by—
No. | spec. lected. - specimen.
622 1 | Adult..| Indianoia, Texas 1851 Col. J. D. Graham,...| Alcoholic.| Jno. Н. Clark........
623 5 | Young do 1853 Lt. A. W. Whipple do Dr. С. В. Kennerly....

ORTHOPRISTIS, Girard.
Gen. Cuan.—The mouth is small ; the upper and lower jaws are provided with small, conical teeth. Тһе edge of the
preopercle is nearly straight and finely serrated. Тһе spinous portion of the dorsal is continuous with the soft portion,
constituting one uninterrupted fin. Three small spiny rays at the anterior margin of the anal, increasing in size from the first

to the third.

The natural affinities of this genus are between Haemulon and Pristipoma.

ORTHOPRISTIS DUPLEX, Grd.
Pram ІХ, Fres. 1—4.

‘Spec. Cuar.—Body somewhat elongated, sub-fusiform in its outline. Head constituting the fourth of the total length ;
snout sub-cenical ; mouth small and slightly protractile, with its gape somewhat oblique; posterior extremity of maxillary even
with a vertical line drawn immediately in adyance of the anterior nasal aperture. The eye is sub-elliptical, of medium size ;
its horizontal diameter entering about four times and a half in the length of the side of the head. The spines at the edge of
the preopercle are very small, short, and acute. The origin of the dorsal fin is situated opposite the branchial apertures, hence
in advance of the base of the pectorals ; its posterior rays extending somewhat further backwards than those of the anal,
without, however, reaching the insertion of the caudal fin. The extremities of the pectorals extend nearly as far as the tips of
the ventrals, which barely reach the vent.

The scales are deeper than long; their posterior section is conspicuously pectinated, whilst
the anterior section exhibits the usual radiating furrows ; thelinesof growth being concentrical.
The base of the caudal, pectoral, and ventral fins is covered with small scales.

Br. VII: VII; D XII, 16; АШ, 13; C4, 1, 8,7,1,3; У1,5; P 18.

The dorsal region is purplish brown, the abdominal region yellowish. Oblique dark streaks
follow the rows of scales above the lateral line, and longitudinal ones upon the middle of the
abdomen beneath the same lateral line. This two-fold system of lines having suggested the
specific name.

Plate IX, fig. 1, represents Orthopristis duplex, size of life; fig. 2, is a scale from the dorsal
region ; fig. 3, a scale from the lateral line; and, fig. 4, a scale from the abdominal region,

List of specimens.
Catal. No.of} Age. Locality. ‘When col-| Whence obtained. | Nature of Collected by—
No. | spec. lected. | specimen.
724 | 9 | Adult..| Indianola, Texas 1851 | Col. J. D. Graham....| Alcoholic.) Jno. Н. С1атК........
725 4 | Young. | Brazos Santiago, Техав...... 1853 | С. Würdemann do С. Würdemann. "ess

Family SP. ARIDAE.

Тһе fishes of this family have, as common characters, a body ovate in profile, sometimes
rather deep, at others somewhat elongated, always covered by well developed scales, generally
ctenoid in structure. Тһе spinous portion of their dorsal fin is continuous with the soft portion,

16 UNITED STATES AND MEXICAN BOUNDARY.

constituting one undivided and scaleless fin; the ,ventrals being inserted under Ше pectorals
or somewhat posteriorly.

The mouth is not protractile and the palate always toothless. The maxillar teeth present
themselves under various aspects characteristic of the genera. The opercular apparatus is
perfectly smooth, the free edges of its bones being without either spines or denticulations. The
branchial apertures are wide and continuous under the throat; the branchiostegal rays being
five or six in number on either side.

LAGODON RHOMBOIDES, Holbr.
Pram ІХ, Fres. 18—16.

Spec. Снак.—Воду rather short and deep ; greatest depth across the thoracic region equal to the third of the entire length.
Head very declivous anteriorly and forming about the fourth of the total length; the snout being sub-conical, the mouth
somewhat protractile, and when in its retracted state, the gape is horizontal. The posterior extremity of the maxillary reaches
a vertical line drawn immediately behind the posterior nasal aperture. The snout is sub-conical and thickish, and the
supraocular region depressed. The eye is well developed, sub-circular in shape; its horizontal diameter entering about three
times and a half in the length of the side of the head. A vertical line dropped from the origin of the dorsal fin would pass
between the gill opening and the base of the pectoral. The posterior extremity of the dorsal is even with that of the anal
and does not quite reach the insertion of the cauda]. The pectorals are elongated, their extremity extending beyond the origin
of the anal, which is hardly reached by the tips of the ventrals.

Syn.—Sparus rhomboides, Linn. Syst. nat. ed. ХПа, 1766, 170.—Suaw, Gen. Zool. IV, 1800, 447.
Sargus rhomboides, Cuv. & Var. Hist. nat. Poiss. VI, 1830, 68, pl. 143.—DeKay, N. Y. Fauna IV, 1842, 93, pl.
lxxi, fig. 228 —Srorer, Synops. 1846,
Lagodon rhomboides, Нотве. South. Ichthyol, 1855, 56, pl. viii, fig. 1.

The scales above the lateral line are deeper than long, and beneath it, longer than deep; the
lines of growth are sub-concentric, the pectinations inconspicuously develvoped ; the radi-
ating furrows existing upon the anterior section only.

Br. УЕ: VI; D XIL 1E; ATH; Н; 05 58,5,1,6; VEDO; P 1; 16."

The dorsal region is light reddish brown, with a bluish metallic reflect, whilst the sides and
abdomen are silvery. Seven distinct transverse narrow blackish bands may be observed along
the back, tapering towards the belly. The first_of these fasciae is occipital, the second sub-
thoracic, and the seventh being caudal. Indistinct intervening fasciae may be observed in
young specimens. In all, young and adult, there exists a round dark spot at the intersection of
the second fascia with the lateral line.

Plate IX, fig. 13, represents Lagodon rhomboides, size of life ; fig. 14 is a scale from the

dorsal region ; fig. 15, a scale from the lateral line; and, fig. 16, a scale from the abdominal
region.

List of specimens.
| 0
“22 g о. of Age. Locality. When collected. | Whence obtained. | Nature of | Collected by—
х | T specimen.
а | 6 Adult.) Brazos | š ... 1853 Major Emory.....| Alcoholic .. John H. Clark ...
732 | 6 ...... Indianola, Texas... ; ......... 1851 Cor J, D. Graham "Ав | do E
ы | 3 ...... St. Joseph's Island, Texas..... 1853 С. Würdemann ......4о...... в. Würdemann ..
134 | > .“ “... Brazos Santiago ..........,... 1853 do an | p иа
|
1958 | Хо мэ. — Texas — 1854 Major Emory... „кји. дол... :. | Dr. C. B. Kennerly
ЙЫ 5 | do 1851 Col. J. D. Graham.|... .do. اغ‎ John H. Clark ...
|

Е o en MUN RM
.

ICHTHYOLOGY. 17

Family MAENIDAE.

In their general aspect the representatives of this family resemble the Sparidae to a very
great extent: the spinous portion of the dorsal fin is either continuous with the soft portion,
else more or less separated from it. Тһе insertion of the ventrals being placed under the base
of the pectorals or somewhat posteriorly to it, and the caudal Яп more or less emarginated or
furcated. The essential differences consisting in the protractility of the mouth, and the presence
upon the jaws of velvet-like teeth, and occasionally of a few canines. Similar velvet-like teeth
may be observed: sometimes on the vomer, at others, on the palatine bones; else the palate
is perfectly smooth or toothless. The edge cf the preopercle is serrated in some and entire in
others.

EUCINOSTOMUS, В. 6 6.

Сех. Снав.- Моц small and very ргогас е, which, when protruded, presents a sub-conico-tubular appearance ; lips thin ;
maxillar teeth ; palate and tongue toothless ; opercular apparatus without either spines or serratures. Gill apertures continuous
under the throat. First dorsal fin contiguous to the second at the base; outline between the two depressed. Caudal fin
furcated. Three spiny rays at the anterior margin of the anal. Scales well developed.

Syn.—Eucinostomus, В. & G. in Ninth Ann. Rep. Smiths. Instit, (1854) 1855, 334.

The second spine, in both the dorsal and anal fins, is much less developed than in Gerres, to
which genus the present one bears close affinities. Тһе same remark applies to the spine of
the ventral fins. Another distinctive trait between Gerres and Eucinostomus consists in the
former having the edge of the preopercle serrated, whilst it is perfectly smooth in the latter.

EUCINOSTOMUS ARGENTEUS, B. & G.
Praw IX, Firas. 9—12.

Spec. Cuan.—The body is rather short and deep, the greatest depth at the thoracic region being а little more than the
third of the total length. Тһе head, which is sub-pyramidal, constitutes about the fourth of the total length ; the mouth,
when retracted, exhibits a horizontal gape, and then the posterior extremity of the maxillary extends to a vertical line drawn
inwardly to the anterior rim of the orbit. Тһе eye islarge and circular; its diameter being contained but three times in the
length of the side of the head. Тһе nostrils are situated towards the upper surface of the snout and nearer the orbit than the
extremity of the jaws. Тһе base of the spinous portion of the dorsal fin is somewhat shorter than that of the soft portion of
the same fin. The posterior extremity of the dorsalis nearly even with that of the anal. The pectorals are longer and more
slender than the ventrals.

Syv.—Eucinostomus argenteus, В. & С. in Ninth Ann. Rep. Smiths. Instit. (1854) 1855, 335.

The scales are deeper than long, anteriorly truncated, and rounded upon the remaining three
margins. Radiating furrows may be observed upon the anterior section of the scale, and the
lines of growth, instead of being concentrical ог sub-concentrical, are absolutely vertical. The
posterior section is cellular, and the pectinations, if they exist at all, must be exceedingly
minute, for we have not detected them.

Br. IV: IV; DIX, 10; А Ш, 8; C5, 1, 8, 8, 14; У 1,5; P 13.

The ground color is silvery ; the dorsal region being of a light reddish brown, with a darker
spot upon the centre of the scales. A black spot at the summit of the spinous dorsal. Trans-
verse, blackish bands or fasciae may be observed in very young specimens.

Plate ІХ, fig. 9, represents Eucinostomus argenteus, size of life. Fig. 10, is a scale from the
dorsal region ; fig. 11, а scale from the lateral line; and fig. 12, a scale from the abdominal
region.

eo‏ سه يو وم

18 UNITED STATES AND MEXICAN BOUNDARY,

List of specimens. ·

Catal. No. of} Age. Locality. When collected. | Whence obtained. | Nature of | Collected by—
No. | spec. speciraens.
720 | 10 jAdult.| Brazos Santiago, Texas ....... 1853 С. Würdemann..| Alcoholic .., С. Würdemann ..
721] 18 Young, Brazos, Texas : 1853 Major Emory do John Н. Clark ...
122 9 |..do..| Indianola, Texas 1853 do do Dr. C.B.Kennerly.
193 | 10 |..до..! St. Joseph's Island, Texas..... 1853 G. Würdemann do G. Würdemann ..

NEOMAENIS, Girard.

Gen. CHAR —Mouth large, not very protractile. Jaws equal; velvet-like teeth along the middle and front of the vomer,
along the palatines and jaws; the latter exhibiting ап exterior row of larger, acute, and conical ones ; whilst two canine-like,
still larger, exist at the extremity of the upper jaw. "Tongue smooth and toothless. Edge of preopercle finely serrated. Gill
apertures continuous under the throat; branchial rays seven. One continuous dorsal fin. Caudal fin posteriorly sub-truncated
or sub-emarginated. Three spiny rays at the anterior margin of the anal.

NEOMAENIS EMARGINATUS, Grd.
Prate IX, Fires. 5—8.

Брес. Снав.--Водйу moderately elongated, compressed, sub-fusiform in a profile view. Head sub-conical, contained three
times and a half in the total length. Posterior extremity of the maxillary extending to a vertical line drawn somewhat
inwardly to the anterior rim of the orbit. Eye sub-circular ; its longitudinal diameter entering about four times in the length
of the side of the head : the rostral distance in advance of the eye being somewhat more than one of its diameter. External
soft ray of ventrals prolonged into a membranous thread stretching beyond the posterior margin of these fins, although not
reaching the origin of the anal, when bent in that direction. The caudal fin, which constitutes about the fifth of the entire
length, is posteriorly sub-concave. The origin of the dorsal is placed opposite the base of the pectorals, the spinous portions
being longer than the soft. The origin of the anal is situated posteriorly to the anterior soft rays of the dorsal. Ventrals
inserted behind the base of the pectorals.

Syn .—Loboles emarginatus, В. & С. in Ninth Ann. Rep. Smiths. Instit. (1854) 1855, 332.

The scales are well developed, somewhat deeper than long, except in the lateral line, where
they are also considerably smaller and posteriorly tapering ; radiating furrows may be observed
upon their anterior section alone, their posterior section exhibiting fine pectinations.

11:11: М АВ: ОБ ТЕ 1.16: VL 5: P L 15.

The ground color is greenish olive with oblique, sometimes, undulating series of purplish
brown spots, one of which on each scale, extending likewise over the vertical fins and occasion-
ally confluent, constituting continuous narrow bands.

The throat and abdomen are rather
yellowish and unicolor.

Plate IX, fig. 5, represents Neomaenis emarginatus, size of life; fig. 6 is a scale from the

dorsal region ; fig. 7, a scale from the lateral line; and, fig. 8,a scale from the abdominal

region.
List of specimens.
Catal. | No. of Locality. ‘When sr Whence obtained. | Nature of Collected by—
No. Spec. lected. specimens.
119 1 | Brazos Santiago, Техаз,.........| 1853 | С. Würdemann......| Alcoholic. б. Würdemann......*
138 1 Mouth of Rio Grande del Norte.| 1853 Major Emory da Fadi B. Clerk. наа»

|
!
)
|
|

ICHTHYOLOGY. 19

Family POLYNEMIDAE.
POLYNEMUS OCTONEMUS, Grd.

Ррате X, Ев. 5—9.

Spec. Снав.--Тһе head enters about four times and a half in the total length, the snout being sub-conical, the mouth rather
large and wide, the posterior extremity of the maxillary extending to a vertical line drawn considerably behind the orbit. Тһе
eye is large and sub-circular; its horizontal diameter being contained about four times in the length of the side of the head. Тһе
edge of the preopercle is finely serrated, the lower spine, situated near the convexity of the limb of that bone, is much larger
than the rest. The thoracic filaments are eight in number, the tip of the longest ones extending beyond the origin of the anal
fin. Тһе posterior extremity of the ventrals barely reach the vent and extend somewhat further backwards than the extremity
of the pectorals.

The scales are deeper than long, pectinated upon their posterior section and furrowed upon
the anterior section. The lateral line, from the scapular region, takes a direct course towards
the middle of the caudal fin. The accompanying figure will give an accurate idea of the form
and relative position of the fins:

Br. VII: VII; D VIII, I, 12; A III, 13; 06, 1, 8, 7, 1,5; VL 5; P د‎

Plate X, fig. 5, represents Polynemus octonemus size of life; fig. 6 is a magnified view of the
head in order to show more particularly the denticulations of the limb of the preopercle; fig. 7
is a dorsal scale ; fig. 8, a scale from the lateral line ; and fig. 9, a scale from the abdominal
region,

List of specimens.

Catal. No. of| Age. Locality. When col- Whence obtained. |Orig'l| Nature of Collected by—
No. | spec. lected. No. |specimens
739 |. 8 Адай. Brazos Santiago, Texas..| 1853 G. Würdemann Alcoholic. G. Würdemann.......
762 | 9 |Young | Galveston, Texas.......| 1853 Lt. A. W. Whipple...| 3 |....до.... Dr.C.B.Kennerly....

Family ATHERINIDAE.

Two species of this family may be recognized in the collections under examination, one from
the fresh waters of the interior of Mexico, specimens of which were collected by Major Rich and
Jno. Potts, esq., the other from the salt and brackish waters of Indianola, St. Joseph's island,
Brazos, and the mouth of the Rio Grande del Norte (Rio Bravo), the specimens having been
collected by Jno. H. Clark, under Col. J. D. Graham and Major Emory, and by Mr. Gustavus
Wiirdemann, of the United States coast survey. Both of the ађоуе вресіев belong to the genus
Atherinopsis, and will be described on a future occasion.

Family MUGILIDAE.

The body is sub-cylindrical, owing to the thickness of the dorsal region. The scales generally
are large, ctenoid in structure, and cover likewise the upper surface of the head. There is по
lateral line properly so to be called, every scale being provided with a mucous hole. The dorsal
fins are widely apart; the ventrals, almost abdominal, are situated on a vertical юэ drawn
between the pectorals and the anterior dorsal. Тһе teeth are exiguous, and sometimes even
wanting. Тһе maxillar bones are small and almost buried in the thickened lip which covers
the premaxillaries, Тһе sub-orbitar bone is often contiguous to that = when the mouth is
closed, concealing entirely under its edge the maxillary.

90 UNITED STATES AND MEXICAN BOUNDARY.

MUGIL BERLANDIERI, Grd.
Prae X, Fres. 1—4.

Spec. Снав.-Тһе head enters about four times and a half in the total length, in which the greatest depth is contained five
times or alittle more. Тһе caudal fin is equal to the head in length. The lower jaw is a little shorter than the upper ; the
teeth are exceedingly small, scarcely perceptible upon the dentaries (lower jaw); they are more apparent upon the outer рге-
maxillar row, although those placed in the rear are not more developed than those of the lower jaw. А patch of asperities is
felt upon the palatines ; the vomer is smooth and preceded anteriorly by a wide transverse groove, such as may be observed in
several other species ; similar asperities exist at the sides of the base of the tongue. The edge of the preorbitar bone, under
which the maxillary is concealed when the mouth is closed and retracted, is denticulated posteriorly.

The anterior third of the dorsal and anal, the base of the pectorals, and the caudal almost
entirely, are protected with small scales. The formula of the fins reads thus :

ТЕК LS А PLS 0 3,1, 66,1, 8; V 1,5; Р 16.

The scales of the body are well developed, deeper than long, finely pectinated posteriorly and
exhibiting diverging furrows upon their anterior section alone; the mucous aperture is elongated
and placed almost exclusively upon the posterior section. Fourteen longitudinal series may be
counted from the base of the first dorsal fin to the mesial line of the abdomen in advance of the
vent. Ina longitudinal series from the branchial aperture to the insertion of the caudal there
are from forty to forty-two scales.

The upper surface of the head and the dorsal region exhibit a greyish tint, whilst the flanks
are silvery, and the sides of the head and the abdomen pervaded with a yellowish or golden
reflect ; longitudinal greyish lines, more or less conspicuous, may be traced along the series of
scales, The fins are uniform light yellow or olive, the base of the pectorals alone being blackish.

Plate X, fig. 1, represents Mugil berlandieri, size of life, it being one of the largest specimens
observed ; fig. 2 is a scale from the dorsal region; and fig. 3, a scale from the abdominal region;
. fig. 4 exhibits a young specimen caught in the same net and supposed to belong to the same
species.

List of specimens.

%

Catal. No. of| Ace. Locality. When col-| Whence obtained. |0 1 Nature of Collected by—
ТЧо. | spec. lected. No. specimens.
163 4 |A.&Y| St. Joseph's Island, Тех. 1853 G. Würdemann Alcoholic. С. Würdemann.. • • • • •
764 | 12 |..do..| Indianola, Тех..........| 1851 Со1. Ј. Р. Стаћат : no. Н. Clark........
165 5 |..40..| Brazos Santiago, Тех... 1853 G. Würdemann do G. Würdemann.. • • • • •
766 8 |Young| Brazos 1853 Major Emory do Jno. Н. Clark... +...
767 | 12 |..do..| Galveston, Тех.........| 1853 Lt. А. W. Whipple...| 3 |....до.... Dr. C. B. Kennerly....

Family SCOMBRIDAE.

This family, as it stands in the systematic writers, includes a long series of genera most
diversified in shape and in structure. None needs a more thorough anatomical investigation
in order to enable us to define it as a group, if a natural group it proves to be. We cannot
help thinking that characters will be detected by the aid of which the various groups already
delineated by superficial traits may be erected into as many natural families.

CHORINEMUS, Сау. & Val.

Зав! limits of this genus are anything but well defined, and not having at our command the
pres cres тиш a revision of its characters, we are compelled to record the following
species under its heading. Some attention ought to be paid to the dentition of the various

1—— —

1:
E
E

ICHTHYOLOGY. 21

species in order to ascertain whether better groups could not be formed, based chiefly upon that
character.
CHORINEMUS LANCEOLATUS, Grd.

BEATE XI, Ела. 5.

Брес. Cuan.—Body elongated, very much compresssed and quite tapering from the origin of the second dorsal and anal to
the peduncle of the tail. Head constituting about the fifth of the total length ; snout elongated and sub-conical ; gape of the
mouth oblique; jaws sub-equal, lower one longest; posterior extremity of the maxillary extending to a vertical line drawn
midway between the pupil and the posterior rim of the orbit. Patches of slender and acute teeth on the vomer, palatines, and
tongue ; a double row of them on either jaws. Eye well developed and circular; its diameter entering three times and a half
in the length of the side of the head : exactly once in advance of its anterior гіт. Pectorals and ventrals of moderate devel.
opment ; ventrals inserted opposite the base of the pectorals.

The surface of the body presents the aspect of minute longitudinal wrinkles into which small,
elongated scales are imbedded. The lateral line, from the scapular region slightly ascends to
nearly opposite the origin of the first dorsal fin, hence descending in slight undulations, until
on the middle of the flank, then straight to the base of the caudal fin.

Вт; У: Villy D УСО A125 0818,59, 5; 8 VO PE

The dorsal region is bluish; the sides of the head and- body being silvery, and the fins unicolor,

Plate XI, fig. 5, represents Chorinemus lanceolatus, size of life. 1618 proper to remark that
the interradial membrane in the second dorsal and anal fins is much less developed than
represented on the figure, thus giving the rays a greater freeness.

List of specimens.

Catal. №. of Age. Locality. When Whence obtained. | Nature of Collected by—
No. | Spec. collected. Specimen.
110 1 ][........] St. Joseph's Island, Техаз...| 1853 G. Würdemann Alcoholic | G. Würdemann ......

CHLOROSCOMBRUS. Girard.

Gen. Cuar.—Elongated and narrow patches of velvet-like teeth on the jaws, vomer, and palatine bones ; tongue smooth ;
mouth rather small and slightly protractile, its gape being oblique and the tip of the lower jaw projecting in front of the upper;
body rather short and deep, scaly; lateral line unarmed, that is, not shielded ; pectoral fins falciform ; two small spines іп
advance of the anal fin. Ventrals very small. A small horizontal spine, directed forwards, in advance of the first dorsal.

Were it not for the unarmed lateral line, the species upon which the present genus is founded
would readily be taken for ۵

To this genus belongs Seriola cosmopolita, Cuv. & Үлт, and which is closely allied to the fol-
lowing one.

CHLOROSCOMBRUS CARIBBAEUS, G rd.
Рілте XI, Ею. 6.

Spec. Снав—Воду deep and rather short, very much compressed, with the ventral outline more convex than the back, which
on a profile view constitutes a very depressed curve. Peduncle of tail exiguous ; caudal fin deeply furcated. Head forming a
little more than the fifth of the p: Ter snout is beds slightly protractile ; the mouth being rather small, its gape very
oblique, and the lower jaw proj the upper. "The posterior extremity of the maxillary extends to a vertical
line drawn across the «цайг тїтї of the orbit: The eye is well developed, sub-circular, its diameter entering about three пет
in the length of the side of the head. Pectorals well developed and бис огт ; ventrals very small, inserted upon а. 1
line drawn immediately behind the base of the pectorals.

Тһе body is covered with small and inconspicuous scales, the lateral line forming anteriorly an
are of a circle, being straight along the flank to the base of the баайа; эмн it is + with
more conspicuous scales.

Br. ҮП: VII; D ҮШ; 29; АП, 29; C 6; EURT 6; Мы riw

29 UNITED STATES AND MEXICAN BOUNDARY.

The color of the dorsal region is purplish blue, а tint probably altered by the alcohol; the
sides of the head and flanks being silvery. А black spot may be observed upon the peduncle of
the tail near the insertion of the caudal fin. "The fins themselves ате of a uniform light olive.

Plate XI, fig. 6, represents Chloroscombrus caribbaeus, size of life.

List of specimens.

Catal.|No.of| Age. Locality. . When Whence obtained. | Nature of Collected by—
No. | Spec. collected. Specimen.
Араке „..| St. Joseph's Island, Texas...) 1853 С. Würdemann......| Aleoholie.| б. Würdemann......

DOLIODON, Girard.

Gen. Cuar.—Head small; snout bluntly rounded with the mouth situated beneath it. Mouth small; velvet-like teeth upon
the jaws and front of the vomer; none on the palatines and tongue. Body rather short, minutely scaly; lateral line unarmed.
Dorsal and anal spines united together by a membrane and contiguous to the soft and articulated portion of these fins.

We are at a loss to account for the fact of Dr. Holbrook identifying the species upon which
this genus is founded, with Trachinotus pampanus, Cuv. & VAL., and which is the type of his
genus Bothrolaemus, characterized by the total absence of teeth.

The Zeus spinosus of Mitchill belongs to this genus of which it will constitute the second
species.

DOLIODON CAROLINUS, Grd.
Pirar ХІ, Fre. 4.

Spec. Снав.--Воду sub-illipsoid, rather short, deep, compressed. Head contained four times and a half in the total length.
Snout thick, blunt, and rounded. Mouth moderate, slightly protractile, placed beneath the snout, with its gape nearly hori-
zontal, the upper jaw alone forming a slight arch over the lower one, which’ is the shortest. The posterior extremity of the
maxillary extending to a vertical line drawn across the posterior rim of the pupil. The eye is well developed and circular; its
diameter entering about three times and a half in the length of the side of the head. Pectorals and ventrals of moderate
development ; ventrals somewhat smaller than the pectorals, and inserted upon a vertical line drawn posteriorly to the base of
the latter.

Syn.—Lichia carolina, ОКАТ, N. Y. Fauna, ТУ, 1842, 114, pl. x, fig. 3.—SronzR, Synops. 1846, 96.—Вр. in Ninth Ann.
‚ Rep. Smiths. Instit. (1854) 1855, 315.

The scales are very minute, inconspicuous ; the lateral line, slightly arched upon its anterior
half, is nearly straight posteriorly, undergoing slight undulations.

Br. V: V; БУМ: 411 22; СТЕБ: V 55; P1,18.,

The upper regions are bluish purple; the inferior regions appearing as though washed with gold
and silver. The upper portion of the second dorsal is blackish ; the rest of the fins being
light olive. |

Plate XI, fig. 4, represents a small specimen of Doliodon carolinus, size of life.

List of specimens.

Catal. |No. of Locality. When collected. | Whence obtained. | Nature of | Collected by—

No. |spec. specimen,

713 | 5 | St. Joseph's Island, Texas ........... ` 1853 С. Würdemann ..| Alcoholic..| С. Würdemann..

|

ICHTHYOLOGY. 28

CARANGUS, Girard.

Сем. Cuar.—Narrow patches of velvet-like teeth on Ше palatines, front of vomer, and upper jaw, which is, moreover,
provided with an external row of small ones of a conical and acerated form. Тһе lower jaw having but one row of the latter
kind. Profile of the head more or less rounded or convex. А small horizontal spine directed forwards in advance of the first
dorsal. Two spines in advance of the anal. Pectoral fins elongated and falciform. Lateral line shielded along the flank and
peduncle of the tail.

To this genus we can already refer with certainty Caranz chrysos, Cuv. & Уль.; Carang
fallax, Cuv. & Var.; Caranx pisquetus, Cuv. & Var; Caranx bartholomaei, Cuv. & Vat;
Caranx defensor, ПЕКлү; Caranz falcatus, Нотвв.; and, Carana richardi, HOLBR.

CARANGUS ESCULENTUS, G rd.
Prate XI, Fires. 1—3.

Spec. Снав.—Воду compressed ; greatest depth contained three times in the total length, in which the head enters four
times. Caudal deeply furcated, either lobe being equal to the head іп length. Тһе diameter of the eye is contained four
times in the length of the side of the head. The gape of the mouth is slightly oblique, the posterior extremity of the maxillary
corresponding to a vertical line intersecting the posterior rim of the pupil. Two canine teeth, larger than the rest, near the
symphysis of the lower jaw: one on either side. Lateral line curved from its origin to opposite the fifth or sixth ray of the
second dorsal, hence straight and shielded to the base of the caudal. Scales small and inconspicuous in young specimens.

Syn.—Scomber carangus, BLocu.—Snaw, Gen. Zool. IV, 1800, 599.
Caranx carangus, Cuv. & VaL. Hist. nat. Poiss. IX, 1833, 91.—Sronzn, Synops. 1846, 101.

The general coloration is silvery, with а lead or violet tint along the upper surface of the
head and dorsal region. А black spot upon the edge of the opercle; a bluish patch at the
posterior edge of the elevated portion of the second dorsal fin, and a brownish filet along the
edge of the caudal. Тһе fins otherwise are yellowish. The young exhibit dark vertical bands
(figs. 2 and 3). "These bands are sometimes still present on specimens of the size of fig. 1.

Plate XI, fig, 1—3, represents three stages in the growth of Carangus esculentus, which is
said to attain occasionally a weight of twenty-five pounds.

List of specimens.

Catal. | No.of} Age. Locality. When col- | Whence obtained. | Nature оку Collected by—
No. | spec. lected. specimens.
708 | 19 |......! Brazos Santiago, Техав........ 1853 С. Würdemann ....| Alcoholic. | С. Würdemann.....
709 1 |Young Mouth of Rio Grande del 1853 Major Emory do John H. Clark......
Norte (Rio Bravo). 1
715 3 |.....| Brazos Santiago, Texas. .......| 1853 G. Würdemann do G. Würdemann.....

ARGYREIOSUS CAPILLARIS, DeKay.
Pram XI, Fie. 7.

Брес. Cnan.—The greatest depth taken obliquely between the origin of the second dorsal and the insertion of the ventrals is
equal to the length measured from the extremity of the snout to the 22 of the caudal peduncle. The snout itself is slightly
protruding, and the profile of the head steeper than in М. vomer. The outline of the occipital region constitutes an are of a
circle rather than a plane. The peduncle of the tail is somewhat шанаа downwards. Anterior two rays of the dorsal fin
prolonged into long filaments. ;

Syn.—Zeus capillaris, Матсн. (non Bloch) in Trans. Lit. & Philos. Soc. М. Y. I, 1815, 383; pl. ii, fig. 2.
Argyreiosus capillaris, DEKav, М. Y. Fauna, IV, 1842, 125; pl. xxvii, fig. 82.—Srorer, Synops. 1846, 104.--
Bp. іп Rep. Smiths. Inst, ІХ, (1854) 1855, 337. : :

24 UNITED STATES AND MEXICAN BOUNDARY.

Тһе color is of a brilliant silvery lustre; the dorsal and ventral filament being blackish.
Plate XI, fig. Т, represents Argyreiosus capillaris, size of life, although not fully grown.

List of specimens.
Catal. | No. of Locality. | Whence obtained. Nature of Collected by—
number. | spec. | specimen.
112 9 Matamoras, Мехісо.........! Р. N. Couch Alcoholic ..| L. Berlandier

VOMER SETAPINNIS, Grd.
Pram XI, Fro. 8.

Брес. Снав.- Greatest depth somewhat more than the half of the total length in all the specimens now before us, the largest
of which we have caused to be figured. Тһе rule appears to be that the depth is less than the half of the length, the body
being proportionally more elongated than represented in the accompanying figure.

Syn.—Zeus setapinnis, Мітсн. in Trans. Lit. & Philos. Soc. N. Y. І, 384, pl. 1, fig. 9.
Vomer brownii, Cuv. & Var. Hist. nat. Poiss. IX, 1833, 189; pl. eclvi..-DeKay, N. Y. Fauna, IV, 1842, 127;
pl. xxv, fig. 78.—SronEn, Synops. 1846, 105.

The color is of а brilliant silvery tint, somewhat greyish along the dorsal region, especially
in full grown specimens. The second dorsal being minutely black dotted, and the pectorals
olivaceous.

Plate XI, fig. 8, represents, size of life, Vomer setapinnis, not quite fully grown.

List of specimens.

Catal, | No. of Locality. When collected. Whence obtained. Nature of Colleeted by—
No. | spec. | specimen.
|
711 5 | Brazos Santiago, Texas . 1853 G. Würdemann ........ Alcoholic ... | ©. Würdemann ........

Family TAENIOIDAE.

We are indebted to G. Würdemann for two specimens of Trichiurus lepturus, Linn., collected,

one at St. Joseph's Island, the other at Brazos Santiago, along the Texan shore of the Gulf of
Mexico.

Family GOBIDAE.
GOBIONELLUS, Girard.

It is our design to place in this genus such species of Gobioids, the body of which is
generally elongated, and always protected with scales; having likewise two dorsal fins, an anal
nearly as long as the second dorsal, and an elongated and pointed caudal fin.

Under this appellation will come Gobius lanceolatus, G. bacalaus, and G. smaragdus, all
three inhabitants of the Caribbean sea ; and, finally, 6. brasiliensis also.

<_› PPAR

ICHTHYOLOGY. 25

GOBIONELLUS HASTATUS, Grd.
PrarE XII, Fras. 7 and 8.

Брес. Cnan.—Head contained about seven times in the total length. Snout anteriorly rounded ; jaws sub-equal ; gape of
tbe mouth oblique ; posterior extremity of maxillary extending to a vertical line drawn back of the pupil. Branchial isthmus
rather wide. First dorsal fin somewhat lower than the second. Caudal lanceolated. Апа! fin ав long as the second dorsal,
and almost evenly opposed to it. Ventrals not reaching the vent. Pectorals extending as far back as the ventrals.

Scales well developed, as deep as long. Color reddish brown, lighter beneath than above ў
fins unicolor.
D VII, 14; А 15; 03,9,8,3; V5; РИ,
Plate XII, fig. Т, represents Gcbionellus hastatus, size of life. Fig. 8 is one of its scales
magnified.
List of specimens.

Catal. | No.of | Age. Locality. When collected. | Whence obtained. | Nature of | Collected by—
No. | spec. specimen.
|
645 ға Adult. | St. Joseph's Island, Tex..... 1854 G. Würdemann...| Alcoholic..| G. Würdemann...

1. GOBIUS LYRICUS, Grd.
Ртлте XII, Fras. 4 and 5.

EC. Снак.—Воду compressed, fusiform in profile. Head anteriorly rounded, contained five times and а half in the
ы length. Jaws sub-equal ; gape of the mouth nearly horizontal ; posterior extremity of maxillary reaching a vertical line
drawn through the pupil. Branchial isthmus wide. Dorsal fins not contiguous. Middle rays of first dorsal filiform and
membranous at their tips, higher than the second dorsal, the posterior rays of which, as also those of the anal, reach the base
of the caudal. Тһе caudal fin itself is lanceolated, and the anal nearly as long as the second dorsal. Тһе tips of the ventrals
reach the vent. "The extremities of the pectorals project further back than the ventrals.

Scales rather large, somewhat longer than deep, peter sub-angular. Color reddish
brown, obscurely barred with blackish brown.
D Vi, 19; A12; 06.89.4776; Х.5 16.
Plate XII, fig. 4, represents Gobius lyricus, size of life. Fig. 5 is one of its scales magnified.

The dorsal fin is not correctly delineated. А
List оў specimens.
|
Catal. | No. of Age. Locality. When | Whence obtained. | Nature of Collected by—
No. | spec. Е collected. | specimen.
| |
646 8 | Adult & Young. | Brazos Santiago, Texas....| 1854 С. Wiirdemann.. . Alcoholic ..| G. Würdemann...

2. GOBIUS WÜRDEMANNI, Grd.

Ozserv.—Resembles very much the preceding species, of which it has the general physiognomy.
The head is somewhat larger, the caudal fin shorter, as well as the ventrals, and the anal not
во deep.

D.YL,I 419; 04,8,0,8; V5; P.16,
The scales are also smaller. The color is reddish brown, obscurely barrel with h blackish.
4 DE.

26 UNITED STATES AND MEXICAN BOUNDARY.

Тһе third dorsal spine is the longest and bears a filiform membranous appendage not quite
so much developed as in С. lyricus. The teeth are very slender, and a good deal smaller than
in the latter species.

List of specimens.

Catal. | No. of | Age. Locality. ` | When collected. | Whence obtained | Nature of Collected by—
Хо. | spec. | specimen.
|
647 1 | Adult. | Brazos Santiago, Техав...... 1854 С. Würdemann ..| Alcoholic ..| С. Würdemann..

3. GOBIUS CATULUS, Grd.
Prate XII, Fras. 9 and 10.

Брес. Снав.--Воду sub-fusiform. Head somewhat decli f ds, constituting not quite the fourth of the entire length
Jaws even ; gape of the mouth somewhat oblique ; posterior extremity of maxillary extending to a vertical line which would
intersect the pupil. Branchial isthmus very wide. Dorsal fins not contiguous; base of the second somewhat longer than that
of the first. Caudal posteriorly rounded. Anal rather short and nearly as deep as the second dorsal is high ; its origin being
situated opposite the third or fourth ray of the latter mentioned fin and nearly even with it behind. Ventrals rather broud,
not extending to the vent. Pectorals broad also and rounded ; their extremities reaching a vertical line intersecting the vent.

Scales of moderate size, longer than deep, posteriorly tapering, with numerous radiating
furrows. Color olivaceous brown, transversely maculated with blackish brown.
DVEH AH 068,3; ко: Р 14.
Plate XII, fig. 9, represents Gobius catulus, size of Ше. Fig. 10 is опе of its scales.
List of specimens.

Catal. |No.of| Age. Locality. When collected. | Whence obtained. | Nature of Collected by—
No. | spec. specimen.
648 2 | Adult. | St. Joseph's Island, Texas... 1854 G. Würdemann ..| Alcoholic ..| G. Würdemann...

4. GOBIUS GULOSUS, Grd.

Брес. Cuan.— The head, which has an elongated appearance, is compressed like the body, constitutes the fourth, or
somewhat less, of the total length. "Тһе snout is sub-conical, the mouth large and very deeply cleft, with its таре oblique, and
the lower jaw slightly longer than the upper.

The posterior extremity of the maxillary extends to a vertical line drawn
altogether behind the entire orbit.

The eyes are rather small, situated towards the upper surface of the head ; the inter-ocular
space being about equal in width to the half of the ocular diameter, which enters nearly five times in the length of the side of
the The branchial isthmus is moderately wide. The first dorsal fin is not contiguous to the second ; it is also higher ;
two of its middle rays being filiform at their extremities ; the posterior rays of the second dorsal and those of the anal barely
reach the insertion of the caudal, the latter stretching a little further than the former. Тһе posterior margin of the caudal

itself is rounded. "Тһе extremity of the ventrals extends to the vent; the pectorals are longer still, rather broad and well
developed.

The scales are of moderate development, deeper than long, with numerous radiating furrows
upon their posterior section.
D VI, 16; А 15; 04, 7, 1,3; V 5; P 18.
The ground color is olivaceous brown; the dorsal region, the upper surface and upper
portion of the sides of the head being maculated with black; the spots having a tendency

to constitute oblique transverse bands along the dorsal region, ee канша ones on the sides
of the head.

!
|
|
|
|

ICHTHYOLOGY. 21

List of specimens.
Catal. No. of Age. Locality. When collected. | Whence obtained. Nature of | Collected by—
No. | spec. specimen.
| :
797 | 3 | Adult & Young. | Indianola, Texas.... 1851 Col. J. D. Graham..| Alcoholic ..| Jno. H. Clark..
|

GOBIOSOMA, Girard.

There are other Gobioids, which, under an external appearance of Gobius, are, nevertheless,
entirely deprived of scales. То include these we frame the above genus. Тһе species which
inhabit the coast of South Carolina and known under the name of Gobius alepidotus (G.
viridipallidus, от 6. boscii), belongs to this type.

GOBIOSOMA MOLESTUM, Grd.
Рілте XII, Fro. 14.

SPEC. Снав.--Неай large, depressed, superiorly flattened, constituting a little less than the fourth of the total length. Eyes
small, situated near the top of the head. Snout rounded ; jaws even ; posterior extremity of the maxillary reaching a vertical
line drawn in advance of the pupil. Branchial isthmus very wide. Dorsal fins contiguous at their base. Caudal posteriorly
rounded. Anal shorter than the second dorsal. Ventrals quite small, not extending to the vent. Pectorals broad and well
developed, extending much beyond the ventrals.

Body and head scaleless. Color dusky brown; fins with blackish streaks.
VII, 19; А 12; 02,8,8,2; V 5; P 16.

The soft rays of the fins are bifurcated, a structure not exhibited on the figure.

Plate XII, fig. 14, represents Gobiosoma molestum, size of life.

List of specimens.
Catal. Хо. оҒ| Age. Locality. When collected. | Whence obtained. | Nature of Collected by—
No. | spec. specimen.
644 | 1 Adult. Indianola, Tex ......... 1851 Со1. д» р. Graham. . Alcoholic .. John H. Clark. .....

> ; T
Family BLENN IDAE.
BLENNIUS MULTIFILIS, Grd.
Ртлте XII, Ета. 6.

Брес. Cnan.—Head contained four times and а half in the total length. Posterior extremity of maxillary reaching a vertical
line drawn through the pupil. Cutaneous flap above the eyes provided on either side and near the base with four filiform cirrhi.
Spinous portion of dorsal fin lower and somewhat longer than the soft portion which is contiguous to the base of the caudal.
Posterior margin of caudal fin rounded off. Origin of anal situated in advance of the anterior soft ray of the dorsal. Pectorals
broad ; their extremities extending sas far back as the anterior margin of the anal. Blackish brown above, reddish brown
beneath ; dorsal region, dorsal and caudal fins with roundish spots, more conspicuous in the young than in the adult.

А broad isthmus separates the gill apertures under the throat. "There are four canine teeth,
two 22 and two lower, one on either side. Тһе lower ones are larger than the —
Br.V: V; D XII, 14; АН, 18; C8, 1, 5, б, 1, 3; У 1,3, Е 15.
Plate XII, fig. 6, represents вый multifilis, size of life. on

خد ام رو ы‏ خو پو حون i‏

98 UNITED STATES AND MEXICAN BOUNDARY.

List оў specimens.
Catal. | Хо. о! | Age. Locality. When collected. | Whence obtained. | Nature of Collected by—
No. | spec. specimens.
649 1 | Adult. | St. Joseph’s Island, Tex.. 1854 Gust. Würdemann..| Alcoholic .. С. Würdemann ....
649 | 17 | Young. | do 1854 va ee Йез cecus EEE do

1. ELEOTRIS SUMNULENTUS, Grd.
Рілте XII, Fres. 1—3.

Брес. Cuan.—Body sub-fusiform. Head contained about four times and а half in the total length. Snout rounded ; jaws
equal; gape of mouth somewhat oblique ; posterior extremity of maxillary extending to a vertical line intersecting the anterior
rim of the orbit. Eye circular ; its diameter entering four times and a half in the length of the side of the head. Branchial
isthmus narrow. Second dorsal fin higher than the first ; its posterior rays, like those of the anal, being the longest, and their
extremities approximating the base of the caudal when inclined in that direction. Tips of ventrals not reaching the vent.
Extremities of pectorals stretching somewhat beyond the ventrals. Caudal fin of the same length as the head, and posteriorly
rounded.

The scales are rather large, as deep as long ; smaller on the upper surface of the head than
on the body.

D X195 A10; 04,7,7, 4; V6; PH:

Color reddish brown with interspersed light spots. А black spot above the insertion of the
pectorals, and a streak from the eye to the angle of the mouth. Branchial apparatus purplish.
Dorsals and anal spotted or barred. Caudal, ventrals, and pectorals greyish olive.

Plate XII, fig. 1, represents Eleotris sumnulentus, size of life. Fig. 2, its head from above.
Fig. 3, one of its dorsal scales. *

List of specimens.

Catal. | No.of | Асе. Locality. When Whence Nature of | Collected by—
No. | spec. collected. obtained. | specimen.
641 1 |Ad'L&Y'g. Mouth of Rio Grande del Norte (R. Bravo)..| 1854 | Maj. Emory..| Alcoholic.| Jno. H. Clark.
| ў

2. ELEOTRIS GYRINUS, Cuv. & Val.
Prate XII, Fras. 11 and 12.

ОвзЕву.— Тре specimen figured being the only one procured by the Commission, we are not
prepared to compare it fully with its congeners, and since it approximates closely the species
under which name we record it, we have thought advisable to wait until more materials shall
be available before any attempt is made to establish either its specific identity with, or difference
from, Eleotris gyrinus.

List оў specimens. ,
Catal. | No. of | Sex. Locality. When collected. Whence obtained. Nature of | Collected by—
о Зи йн ' specimen.
642 1 Q | Mouth of Rio Grande (R. Bravo)... 1854 Maj. Emory....| Alcoholic ..| John Н. Clark..

ICHTHYOLOGY.. 29

PHILIPNUS DORMITATOR, Cuv. & Val.
Prate XII, Fie. 18.

OssERv.— We are likewise compelled to record under the above name the small fish repre-
sented on the accompanying plate. It is the only specimen we have ever seen, and was taken
from the mouth of the preceding species, caught in the act of swallowing it. We entertain
the hope that at no distant period we shall have an opportunity of elucidating whatever in the
history of these two fishes will now: appear as though left untold

List of specimens,

Catal. Хо of) Age. Locality. | When |Whenceobtained| Nature of | Collected by—
No. | spec. | collected. specimen.
| i |
643 1 |Young.| Mouth of Rio Grande (R. Вгауо).....! 1854 | Maj. Emory ...| Alcoholic . - John Н. Clark. ..

Family PLEURONECTIDAE.

We recognize four different species of flat fish belonging to several genera, The specimens
were procured at Indianola and Brazos by Jno. Н, Clark under Col. J. D. Graham and Major
Emory, and at St. Joseph's Island, by G. Würdemann.

Family ECHENÉIDAE.

Two small specimens of a species of Echeneis were obtained at St. Joseph's Island, Texas, by
Gustavus Würdemann of the United States Coast Survey.

Family OPHIDIDAE.
OPHIDION JOSEPHI, Grd.

Брес. CHAn.— Head contained six times in Ше total length. The eye is moderate; its diameter is contained four times in
the length of the side of the head. The posterior extremity of the maxillar bone extending to a vertical line drawn across the
posterior rim of the orbit. The origin of the dorsal fin is situated at some distance behind the base of the pectorals. Ground
color light olive sprinkled all over with brownish or purplish specks, except the sides of the head and the belly which are
unicolor. The vertical fins being lined exteriorly with black.

Differs from О. taylori of the Pacific coast, by a shorter body, more elongated pectorals and a
more backwards origin of both the dorsal and anal fins.

List of specimens.

Catal. | No.of} Age. Locality. When. Whence obtained. Nature of Collected M |

No. | Spec. collected. | | Specimen.

868 | 2 |........| St. Joseph’s Island, Texas...| 1853 | С. Würdemann Alcoholic. | С. Würdemann......

30 i UNITED STATES AND МЕХІСАМ BOUNDARY.

Family SCOMBERESOCIDA E.
BELONE SCRUTATOR, Grd.
PLATE XIII.

Брес. CHAR. pen jaw “өвдөг mn the upper ; head constituting about the third of the total length. Middle region of
cranium d with scales ; the gill covers, the branchial apparatus, cheeks and base of lower jaw are scaly. Eye

large, асінкі; ; its longitudinal diameter entering about twelve times іп the length of the side of the head, eight times іп
advance of the orbit, and thrice posteriorly, The anal fin is larger than the dorsal; the caudal is sub-crescentic upon its pos-
terior margin, its lobes being sub-equal

The anterior portion of both the dorsal and anal fins is protected with smallscales. Тһе scales
which cover the body are of moderate development, longer than deep, irregularly elliptical, ex-
hibiting distant concentric striae but no radiating furrows.

уун АИТ لال‎ ТО Ат С 4, 1, 7, 61,3; V6; P 13.

The upper region is greyish clive, the sides silvery with a dark narrow band of a metallic
lustre, whilst the inferior region is yellowish olive. The fins being unicolor, of a greyish or
yellowish olive, also.

Plate XIII, fig. 1, represents Belone scrutator, size of life; fig. 2 being a dorsal scale; fig.
3, a scale from the lateral line; and, fig. 4, a scale from the abdominal region.

List of specimens.

Catal.|No.of| Age. Locality. When Whence obtained. Nature of Collected by—
No. | Spec. collected Specimens.
833 2 | Adult. | Brazos, Texas 1853 Major Emory ........ Alcoholic. | John Н. Clark........
834 9 | Young. | St. Joseph's Island, Texas... - 1853 G. Würdemann......|....do....| G. Würdemann..... š

Family LABRIDAE.
HERICHTHYS, B. & G.

Gen. CHAR.— Body compressed, sub-elliptical in its outline. Teeth small, sub-conical, simple, exterior row most conspicuous;
lower lip entire. Branchiostegal rays буе in number. Ventrals, dorsal, and anal fins acuminated; caudal rounded off poste-
riorly. Five or six spiny raysto the anal. Scales very large, ctenoid in structure; lateral line interrupted.

xn.—Herichthys, В. & G. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 95

This genus is allied to Heros of Heckel, from which it differs in the structure of the exterior
row of maxillar teeth which are simple instead of exhibiting lateral hooks.

HERICHTHYS CYANO-GUTTATUS, В. & G.
Puate IV, Fras. 9—12.

Брес. Снав.--Тһе head constitutes about two-sevenths of the total length. The snout is sub-conical, the frontal line
depressed in advance of the eyes. Jaws even; three irregular rows of minute teeth placed immediately behind an anterior and
more conspicuous row. Eyes well developed and circular; their diameter entering about four times and a half in the length of
the side of the head. Posterior portion of the cheeks scaly ; large scales on the opercular apparatus. Anterior margin of
dorsal fin situated in advance of the insertion of the ventrals ; the tip of its posterior rays projecting somewhat beyond those of
the anal; both those of the anal and dorsal project beyond the base of the caudal in adult specimens. The insertion of the
ventrals takes place backwards of the base of the pectorals; the exterior soft ray being much longer than the others. Тһе
caudal fin constitutes about two-ninths of the entire length.

Syn.—Herichthys cyano-guttatus, B. & С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 95.

The scales are very large, deeper than long; nineteen to twenty longitudinal series may be
counted across the line of greatest depth. Тһе lateral line is composed of twenty-six scales,

ICHTHYOLOGY, 31

eighteen being counted from the upper angle of the opercle to the interrupted portion of that line
and eight more along the peduncle of the tail.
Р ХХІ, 9-1; AV or VI; 643-15 093,1, 5, 755, 13; УТБ; P М.

The ground color is brownish, scattered allover with small bluish spots. А black blotch is
sometimes observed upon the middle of the spinous portion of the dorsal, and another on the
dorsal region below the former. A third black blotch is observed at the base of the caudal fin.
The young exhibit transverse blackish bands or fascia, which are sometimes observed, though
faintly, upon rather large specimens.

Plate IV, fig. 9, represents Herichthys cyano-guttatus, size of life, but not full grown; fig. 10
isa scale from the dorsal region; fig. 11, а scale from the lateral line ; and, fig. 12, a scale

from the abdominal region.
List of specimens.

Catal. | No.of | Age. Locality. en | Whence obtained. | Natureof| Collected by—
No. | spec. collected. specimens
| КОРШ |
850 5 | Young | Devil's river, Texas...... 1851 Col. J. D. Graham. .| Alcoholic.| Jno. Н. Clark....
851| 14 | Adult & Young Laguna; Fort Brown, Tex.| 1853 Maj. Emory do do
852 8 | do | Brownsville, Техав........ 1852 Capt. Van Vliet do | Capt. Van Vliet...
853 | 10 | do Matamoras, Mexico.......| 1853 Lt. D. N. Couch do | L. Berlandier ....
854 | do | do 1853 | do do do
855 6 | do | San Juan river, San Diego, 1853 | 4о 4о Lt. Couch
| | near Cadereita.
856 | 1 | Adult | Cadereita, Mexico... e| 1853 | do do do

Family SILURIDAE.
AILURICHTHYS, B. & G.

Gen. Снав.- Неай depresse d, smooth, unarmed; t broad and ded off. Two pairs of flattened barbels; a maxillar pair,
sometimes very much elongated ; and a mental pair, always shorter. Velvet-like teeth on the pre-maxillaries and front of the
vomer. Anterior margin of both dorsal and pectoral fins prolonged into a membranous thread, more or less elongated, according

to the species. Ап adipose dorsal fin situated opposite the anal. Caudal more or less furcated.

Syn.—Ailurichthys, В. & С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 26. |
This genus differs from Galeichthys, to which it is closely related, by the presence of two
pairs of barbels only, instead of three. Accordingly Galeichthys gronovii, С. eydouxii, and G.
blochii, of Cuvier and Valenciennes, must be referred to it.

AILURICHTHYS MARINUS, В. & G.

Salt water Cat-fish.
PLATE XIV.

This well known and rather common species we have caused to be figured in order to supply

a desideratum. Fig. 1, із taken from a specimen double that size; fig. 2, being an outline of

the fish seen from above; and fig. 3, the head seen from beneath, exhibiting the shape of the

mouth and the insertion of the mental pair of barbels.

Svx.—Silurus marinus, Мітсн. in Trans. Lit. & Philos. Soc. N. Y. І, 1815, 433.

Galeichthys parae, Cuv. & VaL. Hist. Nat. Poiss. XV, 1840, 33. M
Galeichthys marinus, ОЕКлт, N. Y. Fauna IV, 1842, 178; pl. xxxvii, fig. 118.—SronEn, Synops. 1846, 149.
Ailurichthys marinus, B. & С. in Proc. Acad. Nat. Sc. Philad. УП, 1854, 26.

82 | UNITED STATES AND MEXICAN BOUNDARY.

Тһе dorsal region is bluish, tinged with green or olive; the flanks being silvery and the belly
of an opaque white. Тһе fins are uniform greyish olive, the adipose alone being blackish.

List of specimens.

Catal. No.of| Age. Locality. When Whence obtained. | Nature of| Collected by—
No. | spec. collected. specimen.
|
835 | 1 | Adult..| Indianola, Texas | 1851 | Col. 3. D. беа. Alcoholic | Jno. Н. Сы&....

ARIUS EQUESTRIS, B. & G.
Pram XV.

Брес. Снав.--Неай contained four times and three-quarters in the total length. Horizontal diameter of the eye contained
five times in the length of the side of the head. Maxillary barbels extending to the middle of the length of the pectorals.
Anterior margin of the dorsal fin thrice as high as its posterior margin, and equidistant between the extremity of the snout
and the adipose ; its superior margin being sub-concave. Adipose dorsal fin of medium size, and situated opposite the middle
of the anal. Тһе latter is deeper than long, and concave upon its outer edge. Extremities of the pectorals extending as far
back as the posterior margin of the dorsal. Ventrals are nearly equidistant between the tip of the pectorals and the origin of
the anal.

Syn.—rius equestris, В & G. in Proc. Acad. Nat. Sc, Philad. VII, 1854, 96.
The color 18 of a greyish argentine hue, somewhat darker along the dorsal region than on
the flanks and the belly.
Br V: V; DL 75; A16; C13, 1, 7, 7, 1, 12; V 6; PI, 9.
Plate XV, fig. 1, represents Arius equestris, size of life; fig. 2 is an outline of the fish seen
from above; fig. 3, an outline of the head seen from beneath, showing the shape of the mouth
and the insertion of the mental barbels.

List of specimens.

Catal. | Мо.оҒ| Age. Locality. When Whence obtained. | Nature of | Collected by—
No. | spec. collected. specimen. |
836 1 Adult..| Indianola, Texas 1851 Col. J. D. Graham. .| Alcoholic. | Jno. Н. Clark. «+s

1. PIMELODUS AFFINIS, B. & С.
Рілтев ХУІ & XVII.

Брес. Снав.--Тһе head is contained five times and a half in the total length, in which the caudal fin enters but five times.
The eye is of medium size, its diameter entering a little more than six times in the length of the side of the head. Тһе anal
is very elongated, its base being somewhat more than the fourth of the whole length, and the tips of its posterior rays extend
further back than the extremity of the adipose бп, which is inserted opposite the posterior third of the one just alluded to.
The extremity of the pectoral fins extends nearly as far as a. vertical line drawn at the posterior margin of the dorsal ; the fins
themselves being rather slender. The ventrals are broad, somewhat shorter than- the pectorals, and extend beyond the anterior
margin of the anal.

Syn.—Pimelodus affinis, B. & б. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 96.

This species is very closely allied to P. coerulescens, Rafin. and distinguished from it by а
more advanced position of the dorsal fin, and a greater elongation of the barbels ; the maxillar

ICHTHYOLOGY, 33

pair extending beyond the base of the pectorals; the inner mental pair being shorter than the
external one. The supra-nasals are the smallest, and when lying over the surface of the head
they extend as far back as a line drawn from one pupil to the other.
DL6;AS;OULLSTLLO.Y8:PLIO

The color is reddish brown above, silvery white beneath, occasionally marked with small
sub-cireular black spots. Тһе fins being uniformly olivaceous or greyish.

Plate XVI, fig. 1 represents Pimelodus affinis, somewhat reduced in size ; fig. 2, is an
outline of the same fish seen from above; and, fig. 3, the head seen from beneath.

Plate XVII illustrates three stages of growth of the same species, showing the constancy of
its specific characters, and particularly interesting as compared to the following species
figured on Plate XVIII.

List of specimens.

|

Catal. | No. of | Age. | Locality. When | Whence obtained. | Natureof| Collected by—
collected. | specimens.
|

|
| | |

837 | 10 | Adult..| Mouth of Rio Grande del Norte....| 1854 Maj. Emory........| Alcoholic.| Jno. H. Clark....
| 7 ...do...| Brownsville, Texes 1851 | Capt. Van Vliet во...) Capt. Van Vliet..
| |

2, PIMELODUS VULPES, Grd.
Pram XVIII.

SPEC. Снав.--Іп its general aspect this species resembles the preceding one, from which it differs chiefly by а shorter and
deeper anal fin, smaller spines at tbe anterior margin of the dorsa] and pectorals, and, perhaps, a caudal less deeply furcated.
The ventrals are rather short and broad, being also inserted further apart from the origin of the anal, since their posterior
extremity extends to the anterior edge of the latter fin and no further. Тһе posterior extremity of the adipose fin is nearly even
with the terminus of the anal. Тһе head enters about five times in the total length ; the mouth being larger than in P. affinis.

The color of the dorsal region is of a greyish black or slate hue, somewhat lighter on the
flanks and beneath. Small, sub-circular, black spots may sometimes be observed scattered over
the body. The fins, as usual, being unicolor.

PLP AD 5 0-55 ٢ 5: اول د‎
Plate XVIII represents various stages of growth of Pimelodus vulpes, size of life.

List of specimens.

Catal. Ко. of) Age. Locality. When | Whence obtained. | Orig. | Nature of Collected by—
No. | spec. : collected. No. | specimens.
| | я |
I | -
843 9 m Live Oak creek, Texas........| 1854 Major Ешогу....... 90 | Alcoholic. Dr. C. B. Kennerly.
844 | 1 ......| Camanche Spring, Техаз...... 1851 | Col. J. D. Graham |... .00,... John Н. Clark...
SG 6 Ls Rio Leona: Nueces, Техав.... 1851 do do, «бо... ы...
846 | 4 ...... Piedra Painte, Texas . 1851 do credo do..
847 I Босо а Devil» river, 10۷8 гс... Іні do я -| | do do.
848 | 1 Young Camanche Spring, Техав...... 1851 do do у >
849] 9 T .... Rio Salado, Texas.... 1851 „до до |

VENE

34 . : UNITED STATES AND MEXICAN BOUNDARY.

Family CYPRINIDAE.
ICTIOBUS TUMIDUS, Grd.
Prate ХІХ, Fras. 1—4.

Брес. Снав.--Неай constituting about the fifth of the total length. Snout sub-conical.

4:

pectorals e g almost to the base of the ventrals. Caudal fin furcated and equal to the head in len

ng
Syx.— Carpiodes tumidus, В & С. in Proc. Acad. Nat. Sc. Philad. УП, 1854, 28.
Ictiobus tumidus, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 170.

The scales are nearly as deep as long, exhibiting radiating furrows upon their anterior and
posterior sections. Thirteen longitudinal series may be counted upon the line of greatest depth,
and from thirty-seven to thirty-eight scales in the lateral line.

път даа. Ср 15941, 4 V 29. P 16.

The color is light reddish brown above, and yellowish white beneath.

Plate XIX, fig. 1 represents Ictiobus tumidus, size of life; fig. 2 із а scale from the dorsal
region ; fig. 3, a scale from the lateral line; and, fig. 4, a scale from the abdominal vicem

List of specimens.

Catal.| No. of Locality. When collected. | Whence obtained. | Nature of Collected by—
No. | spec specimens.
180 6 | Near Fort Brown, Texas.........| 1853 Major Emory ......| Alcoholic ..| John Н. Clark......

1. MOXOSTOMA KENNERLII, Grd.
Prate XX, Fries. 7—9.

Брес. Cuan.—In its general physiognomy this species resembles М. oblongum, more than any other of its genus. The
greatest depth, taken immediately in advance of the dorsal fin, does not enter quite four times and a half in the total length
The head forms a little less than the fifth of that same length. "The lower lip is rather broad and very little emarginated
whilst in M. claviformis it is very thin and quite sub-divided. The anterior margin of the dorsal is much nearer the tip of the
snout than the insertion of the caudal ; the upper margin of that fin is sub-convex and as long as high, whilst in M. claviformis
the height is much greater than the length. The caudal is deeply concave posteriorly ; the anal is deep and narrow, its
extremity extending, as usual in the genus, to the base of the caudal.

The ventrals have pretty much the same position as in
М. claviformis.

Sxyx.—JMozostoma kennerlii, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 171.
The anterior two rays, in both the dorsal and anal fins, are mere rudiments ; also the anterior
one in the ventral fins. Тһе scales are not quite so long as in М. claviformis.
ра, 18; Аз 8; 0415,85, 1.3: VL 9 P 13.
Plate XX, fig. 7 represents Moxostoma kennerlii, size of life; fig. 8 is a scale from the dorsal
region ; and, fig. 9, а scale from the abdominal region.

Mouth very small and prominent ;
lips small. Eyes very large, subcircular, their aiameter being contained about four times in the length of the side of the head.
Anterior margin of dorsal fin nearly equi-distant between the extremity of the snout and the insertion of the caudal. Tips of
posterior M of anal extending as far as the base of the caudal. Extremities of ventral fins reaching the vent ; extremities of

|
|
|
|
|
|

ICHTHYOLOGY. 35

List of specimens.
Catal.| Cor. No. |No. of| Age. Locality. When | Whence ob- | Nature of | Collected by—
No | ofteeth. | spec. collected. tained. specimens,
161 | 2135 | 7 Adult.) Dry creek, near Victoria, Техаз. 1854 Major Emory.) Alcoholic | Dr. C. В. Kennerly.

2. MOXOSTOMA VICTORIAE, Grd.
PLATS XX, Fias. 1—3.

рес. СнАв.— Body elongated, fusiform, reminding us, by its general appearance, of certain species of Mullet (Mugil). Тһе
greatest depth is nearly equal to the length of the head, which constitutes the fifth of the entire length, the lobes of the caucal
fin excepted. The dorsal fin is higher than long, and its anterior margin is situated nearer the tip of the snout than the
insertion of the caudal fin. The latter is furcated.

SxN.—.Mozostoma victoriae, GRD. in Proc. Acad. Nat. Sc. Philad. УШ, 1856, 171.

The sub-opercle is well developed ; the eye is sub-circular, its diameter being contained four
times and a half in the length of the side of the head. Тһе snout is rather pointed, sub-conical,
and the mouth, which is small, placed entirely in advance of the orbit.

Ш 0515,85 دوا‎ Y РЕКЕ

Twelve longitudinal rows of scales may be counted upon the greatest depth. The scales upon
the dorsal and lateral regions are provided with a black dot or spot upon the anterior part of
the exposed portion of the scale. Greatest length of specimens observed, six inches and a half.

Plate XX, fig. 1 represents Moxostoma victoriae, size of life; fig. 2 is a scale from the dorsal
region; and, fig. 3, a scale from the abdominal region.

List of specimen.

Catalogue | Хо. of Locality. When Whence obtained. | Nature of| Collected by—
number. | specimen. collected. specimens
164 2 Dry creek, near Victoria, Техав. 1854 Major Emory ------- Alcoholic. | Dr. C. B. Kennerly.

7
3. MOXOSTOMA CAMPBELLI, Grd.
PLATE XX, Fres. 4-6.

Spec. Cuan.— Body sub-fusiform and elongated like the preceding species, which it resembles in its general outline, and in
the proportions of the head and depth of the body towards the total length. The snout is likewise pointed and sub-conical, but
the eye is*much larger, and the sub-opercle very exiguously developed. The position and shape of the fins do not differ mate-
rially from the preceding species, with the exception of the caudal, which is concave posteriorly instead of being furcated.

Sxyx.—JMozostoma campbelli, GRD. in Proc. Acad Nat. Sc. Philad. УНІ, 1856, 172. Ке
The scales are smaller than in М. kennerlii; thirteen rows instead of twelve are to be o "m d
upon the region of the greatest depth of the body. ОВОВЭ d
D 15: АЮ. 05, 1, 88,1, 5; V9; P 1o.
Plate ХХ, fig. 4 represents Moxostoma campbelli, size of life; fig 5 is a sale from the dorsal
region ; "s fig. 6, а scale from a abdominal region. ;

56 UNITED STATES AND MEXICAN BOUNDARY.

List of specimens.

Catal. No. of Locality. When collected. | Whence obtained. | Nature of Collected by—
No. | spec. specimens.
162 1 Devil's river, Texas 1851 Col. J. D. Graham. Alcoholic...| John Н. Clark....
163 2 | Live Oak creek, Texas 1854 Major Emory do | А. Н. Сатрђе 1...

1. PTYCHOSTOMUS CONGESTUS, Grd.
Prate XXI, Fres. 5—8.

Брес. Снак.- The head is contained five times and а half in the total length. Тһе snout is blunt, abruptly truncated, and
the mouth very small. 'The eyes are large, sub-elliptical, and their longitudinal diameter contained four times in the length
of the head from the tip of snout to posterior margin of opercular apparatus. Тһе dorsal fin is sub-quadrangular, its anterior
margin being nearer the tip of snout than the Базе of caudal. The caudal itself is semi-lunar, with its lobes rounded. The
anal is narrow; its length is less than half its height. The ventrals are inserted under the middle of the dorsal. The tip of
the pectorals does not reach the base of the ventrals.

Зум. — Catostomus congestus, В. & G. in Proc. Acad. Nat. Sc. Philad. УП, 1854, 27.
Ptychostomus congestus, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 172.

Тһе scales are large ; there are fourteen rows across the line of the greatest depth of the body.
The lateral line, which runs straight along the middle of the side, contains about forty-six scales.
фа Зои: рок. CX, 5,8 1,2; V9; P 17.

The color, as preserved in alcohol, is uniform reddish brown above, lighter beneath ; sides
silvery. Тһе fins are unicolor, and of the tint of the region to which they belong.

Plate XXI, fig. 5 represents Ptychostomus congestus, size of life; fig. 6 is a scale from the
dorsal region ; fig. 7, a scale from the lateral line; and, fig. 8, а scale from the abdominal.
region.

List of specimens.

No. of | Locality. When collected. | Whence obtained. | Nature of Collected by—

specimens.

|
|

[

Rio Salado, aro али 1851 Col. J. D. Graham.| Alcoholic...| John Н. Clark....

2. PPYCHOSTOMUS ALBIDUS, Grd.
Prarg XIX, Fras. 5—8.

. The general physiognomy of this species reminds us of P. congestus, although the body is
more slender, the head more elongated, and the caudal fin more deeply furcated. Тһе mouth
is a great deal larger; whilst the scales, which are longer than deep, are smaller than in the
species just alluded to. Тһе ventral fins are missing upon the specimens before us; their
insertion alone could be observed. Тһе anal is quite narrow and slender. Тһе color is greyish
white above, and greyish silver beneath.
Sxx.— Ptychostomus albidus, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 172.

Plate XIX, fig. 5 represents Ptychostomus albidus, size of life; fig. 6 is a scale from the

dorsal region ; fig. 7, a scale from the lateral line; and, fig. 8, a scale from the abdominal region.

».

МЭ

—

لر بخ sab‏ قو د S Klee‏

сана

ICHTHYOLOGY. 31

List of specimens.

|
Catal. |No. of Locality. When collected. | Whence obtained. | Nature of Collected by—
No. | врес. specimens
|
|
170 2 | Rio San Juan, near Monterey, New 1853 Lt. D. N. Couch. .| Alcoholic.. .| Lieut. Couch.....
І еоп

MINOMUS, Girard.

Сех. Снав.- Воду elongated and fusiform. Head longer than deep, dorsal fin either higher than long, or with both dimen-
sions equal. Тһе lips being tuberculated, moderately bilobed. "The pharyngeals not expanded laterally, but considerably bent
inwardly. Тһе teeth compressed, decidedly bicuspid, but the inner projection more developed than the outer. "Тһе scales being
nearly of the same size, though slightly smaller anteriorly than posteriorly. "They are sub-elliptical, longer than deep, with
radiating furrows upon the anterior and posterior sections ; else all around.

SvN.—JMinomus, Grn. in Proc. Acad. Nat. Sc. Philad, VIII, 1856, 173.
1. MINOMUS INSIGNIS, Grd.
Рглте XXI, Fres. 1—4.

БРЕС. Снан.--Воду sub-fusiform, elongated, compressed. Head forming two-ninths of the total length. Mouth of medium
size, surrounded with considerably developed lips. Eyes large, sub-elliptical; their longitudinal diameter contained almost six
times in the length of the side of head. The dorsal fin is sub-quadrangular ; its anterior margin is situated midway between the
snout and the base of caudal fin. The latter is posteriorly furcated, with its angles sub-acute. Тһе anal is quite narrow and
elongated ; its base enters three times in the length of its anterior margin. Тһе ventrals are inserted under the posterior half of
the dorsal; their posterior extremity does not reach the vent. The pectorals are elongated, their tips not extending as far back
as the anterior margin of the dorsal.

Syx.— Catostomus insignis, В. & G. in Proc. Acad. Nat. Se. Philad. VII, 1854, 28.
Minomus insignis, Gro. in Proc. Acad. Nat- Sc. Philad. VIII. 1856, 173.

The scales are large; there are (807 rows of them between the base of the Болгар апа
the dorsal line. Тһе lateral line takes a straight course along the middle jd the sides, and is
composed of about sixty scales.

02115 AZ 1068: C3, 188,13, Y 10; F IB.

The color, as preserved m alcohol, is dark réddioh бына above and on the sides, lighter
beneath. There is a black dot at the base of each scale, giving a dotted appearance to the
body. "The fins are unicolor.

Plate XXI, fig. 1 represents Мілотив insignis, size of life; fig. 2 is a scale from the dorsal
region ; fig. 3, a scale from the lateral line; and, fig. 4, a ЗА from the abdominal region.

List of specimens,
| | Лий 7 ون‎ P Rote
Catal. Cor. Хо. Хо. of| Age. | Locality. When со!-| Whence obtained. | Nature of | Collected by -
lected. с specimens. 17% us

No. of teeth. | врес.
|
169 | 9738 |

|
|
|

4 ЕТ Rio San Pedro, tributary of Rio СНа. 1851 | Col J.D. Graham Alcoholic.

88 UNITED STATES AND MEXICAN BOUNDARY.

2. MINOMUS PLEBEIUS, Grd.
Ртате XXII, Eras. 1—4.

Spec. Снлв.— Body sub-fusiform, compressed. Head elongated, sub-conical, forming the fifth of the entire length. Mouth
of medium size. Eyes large, sub-elliptical, their longitudinal diameter being contained about five times in the length of side of
head. Dorsal fin sub-quadrangular, its anterior margin being equidistant between the tip of snout and the first rudimentary
rays at the upper lobe of the caudal. Тһе latter is slightly concave posteriorly, and the lobes rounded off. Тһе base of the
anal is contained nearly three times in Из height, and when brought backwards its tip extends to the rudi:nentary rays at the
inferior lobe of the caudal fin. The ventrals are inserted under the posterior third of the dorsal ; bent backwards, their tip does
not reach as far as the anus. The pectorals are of medium development, sub-ovate, posteriorly acute.

Syn.—Catostomus plebeius, B. & С. in Proc. Acad. Nat. Sc. Philad. УП, 1854, 28.
-Minomos plebeius, Севр. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 173. "

The scales are of medium size, considerably the largest on the peduncle of the tail. "Twenty-
eight to thirty rows from the base of the ventrals to the dorsal fin. About eighty in the lateral
line, which is not discernible as far as the base of caudal fin.

PEIC LC CS, 1, S8 L2; V8, P.H.

"The color, ав preserved in alcohol, is dark brown on the upper regions, faintly mottled with
blackish patches. The sides and belly exhibit traces of orange in some of the specimens, in
others it is pale yellowish. The fins are unicolor; the dorsal, caudal, and pectorals, blackish
brown; the anals and ventrals, yellowish.

Plate XXII, fig. 1 represents Minomus plebeius, size of life; fig. 2 is a scale from the dorsal
region ; fig. 3, scale from the lateral line; and, fig. 4, a scale from the abdominal region.

List of specimens.
Catal. | Cor. No. | No. of | Age. Locality. When со! | Whence obtained. | Nature of Collected by—
No. | of teeth. | spec. lected. specimens.

со

168 9737 Adult | Rio Mimbres, tributary of 1851 “Col. J.D. Graham | Alcoholic) John Н. Clark......
Lake Guzman. |

3. MINOMUS CLARKI, Grd.
PLATE XXII, Fras. 5—8.

Spec. Снав.--А rather small and short species, in shape sub-fusiform and compressed. The dorsal line is gently arched.
Head small, sub-conical, truncated anteriorly, forming a little less than the sixth of the total length. The eyes are sub-circular,
of medium size, their diameter being contained about four times in the length of the side of the head. The upper margin of
dorsal fin is slightly concave; its anterior margin as high as long. The caudal is sub-crescentric posteriorly, with rounded
lobes. The base of the anal is narrow ; its height is twice and а half the width. The insertion of the ventrals is under the
posterior third of the dorsal. The pectorals are elongated and of medium development.

Syn.—Catostomus clarkii, В. & G. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 27.
inomus clarkii, Ско. in Proc. Acad. Nat. бе. Philad. VIII, 1856, 173.

The scales are rather large, about twenty rows оп a cross line from base of ventrals to anterior
margin of dorsal. Sixty-eight to seventy scales in the lateral line, which extends to caudal fin.
D2, 11012; 43,7; 05,1, 8, 8, 1,4; V 10; P 11.

Colors in alcohol: greyish brown above, with scattered darker nebulous spots ; sides greyish ;
belly whitish ; fins unicolor, vertical ones greyish ; horizontal ones yellowish.

Plate XXII, fig. 5 represents Мтотиз clarki, size of life; fig. 6 is a scale from the dorsal
region ; fig. 7, a scale from the lateral line; and, fig. 8, a sili from the abdominal region.

ET

ICHTHYOLOGY. 39

List of specimens.

| |
Catal. | Cor. No. | No. of бя Locality. "When col-, Whence obtained. | Nature of Collected by—
No. | of teeth. | spec. 22 | lected. | specimens.
| | | |
166 | 444522744; | 4 Young.| Rio Santa Cruz, or Sonoito. 1851 | Col. 7. D. бан” Alcoholic | John Н. Clark....
167 | 2736 | 4 | Adult..| Rio Sonoit 1851 8 do

| | | | | |

1. ACOMUS LATIPINNIS, G r d.
Pram XXIV, Fres. 1—6.

SPEC. Снлв,—Сепега1 aspect sub-fusiform. Head proportionally small, and contained about five times and a-half in the total
length. Eyes small, situated near the upper surface of the head. Mouth small, also, the lips being large and fleshy, The fins
are all very much developed, constituting a prominent specific хан, ^ ho upper margin of the dorsal is slightly concave,
and the posterior margin of the caudal crescent-shaped ; the anal, ventrals, and pectorals being exteriorly rounded or lanceolated.
Syn.—Catostomus latipinnis, В & G., in Proc. Acad. Nat. Зе. Philad. VI, 1853, 388.
Jdcomus latipinnis, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 173.

The scales are of medium size, sub-elliptical, longer than decp, and considerably smaller on
the back than on the sides and on the abdomen. The lateral line runs along the middle of the
flanks from the opercle to the base of the caudal fin.

Аа 1 88,15: У 10; FIS.

The upper part of the body is reddish brown ; the upper part of the tail and the flanks are
greenish brown; the abdomen being yellowish orange. Тһе caudal fin is olive; the anal, ven-
trals, and pectorals exhibit traces of deep. orange, especially on their outer margin.

Plate XXIV, fig. 1 represents Acomus latipinnis, somewhat reduced in size; fig. 2 is the
head from beneath, to show the mouth and lips; fig. 3, the head from above; fig. 4, a scale
from the dorsal region ; fig. 5, a scale from the lateral line ; and, fig. 6, a scale from the abdo-
minal region.

List оў specimens.

Catal.) Cor. No. |No.of| Age. Locality. ‘When со1- Whence obtained. |Nature of Collected by—

No. | of teeth | spec. lected. specimens.

Adult. Rio San Pedro, tributary | 1851 (Col. J. D. Graham) Alcoholic.) John Н. Clark .......

of the Rio Gila.

955 *......... 9 do | 1851 | 49. do .do
i | |

254 2803

“

2. ACOMUS GUZMANIENSIS, G r d.

Prare XXIII, Fras. 6—10.

Брес. Cuan.— The head forms the fifth of the total length; its shape is sub-quadrangular, sub-pyramidal. The eyes аге |
small and circular. Тһе lips аге well developed and covered with large рарШае, but the posterior one is less indented than in
Л. latipinnis. It has the general physiognomy of .4. latipinnis, owing to evelopment of its fins. It is, however,
very readily distinguished from the latter by the presence of much larger scales, especially upon the dorsal region. In shape,
the scales are similar to those of Л. latipinnis, being elliptical, somewhat longer than deep, but the radiating furrows are more
numerous.

Syx.— Catostomus (-lcomus) guzmaniensis, Ско. in Proc. Acad. Nat. Sc. Philad. УШ, 1856, 173. —

40 UNITED STATES AND MEXICAN BOUNDARY.

The anterior two rays, in both the dorsal and anal fins, are rudimentary ; so also the exterior
one in the ventrals. Тһе upper regions are purplish black, with an orange lateral band from
head to tail, the inferior regions being yellowish white.

DTI Алкар аз Y L p; PT.

Plate XXIII, fig. 6 represents Acomus guzmaniensis, size of life; fig. 7 exhibiting the mouth

and lips; fig. 8, a dorsal scale ; fig. 9, a scale from the lateral line; and, fig. 10, a scale from

the abdominal region.
List of specimens.

вв à зай
Catal. | Хо of | Age. . Locality. When col- Whence obtained. Nature оҒ| Collected by—
No. spec. | lected. specimens.
|
260 2 | Janos River, trib. of. 1854 Maj. Emory Alcoholie | Dr. C. B. Kennerly...
| Lake Guzman, Chih'a.

CATOSTOMUS BERNARDINI, Grd.
Prate XXIII, Fres. 1—5.

Брес. Снав.--А specimen of seven inches and a-half, slender and graceful; the head forming somewhat less than the fifth
of the total length. Тһе eye is large and sub-circular ; its horizontal diameter entering a little over four times in the length of
the side of the head. The upper margin of the dorsal is sub-convex, the tips of its posterior rays reaching a vertical line which
would intersect the anus. Тһе caudal is sub-crescentic posteriorly. The ventrals and pectorals are well developed.

Syn.— Catostomus bernardini, Grp. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 175.

The scales are elongated, somewhat irregular upon their anterior and posterior edges, and
exhibit radiating furrows upon both the anterior and posterior sections, and apparently more
numerous upon the former section than upon the latter.

D15; А 10; (5, 1,8, 8, 1,5; V 10; P 16.

The color is uniform purplish black above, and yellowish white beneath.

Plate XXIII, fig. 1 represents Catostomus bernardini, size of life; fig. 2 exhibiting the
mouth and lips ; fig. 3, a dorsal scale; fig. 4, a scale from the lateral line; and, fig. 5, a scale
from the abdominal region.

List of specimens.

Catal. | No. of | Age. Locality. When col-| Whence obtained. | Nature of | Collected by—
No. spec. lected. specimen.
174 1 San Bernandino, in an 1854 Maj. Emory. Alcoholic. Ог. C. B. Kennerly ...

affluent of the Rio
Huagui, west of the
Sierra Madre, Mex.

CAMPOSTOMA, Agass.

Сем. Cnan.—Head sub-conical; body ON: mm хэдээ Snout obtuse and protractile. Mouth inferior,
though its gape is horizontal. Lips very conspicu bels or cirrhi. Eyes of moderate development ; isthmus
very wide. Origin сЁ ventrals situated in ы of the ante:ior margin of the dorsal. Caudal furcated. Scales of dorsal
region deeper than long ; of the abdominal region longer than deep, with radiating furrows upon the posterior section or poste-
rior half. Pharyngeal bones strongly curved, with a small dilatation upon their convexity. Teeth of the cultriform kind, of
the grinding type, occasionally somewhat hooked. They are disposed upon a single row of four, or else upon a double row of
four and one, in the following manner : 4—4, or 1 | 4—4 | I.

Svw.—Campostoma, Acass. in Amer. Journ. of Sc. and Arts, 2d ser. XIX, 1855, 219.—Gnr. in Proc. Acad. Nat. Sc.
Philad. VIII, 1856, 176,

ERN

ICHTHYOLOGY. ; 41

1. CAMPOSTOMA ORNATUM, Grd.
PILATE XXV, Fras. 1-4.

Брес. Силв.— is larger, more elongated, and more fusiform than С. anomalum. Тһе head enters four times and а half in
the total length. Тһе diameter of the eye enters nearly six times in the length of the side of the head The scales are much
smaller than in C. anomalum ; they are sub-circular, rather deeper than long, with radiating furrows upon their posterior half.

SyN.—Campostoma ornatum, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 176.

The upper regions are purplish black; the inferior regions golden brown and yellow, with
black spots scattered over the flanks. A black patch at the base of all the fins, otherwise the
latter are orange or yellowish brown.

D2,8; А 2,8; СТ, 1, 9, 8, 1,6; V8; P 16.

Plate XXV, fig. 1, represents Campostoma ornatum, size of life; fig. 218 а scale from the
dorsal region ; fig. 3, a scale from the lateral line; and, fig. 4, a scale from the abdominal
region.

List of specimens.
Ы

*

{
Catal.| Cor. No. |No. of Age. Locality. When col-| Whence obtained. | Nature of Collected by—
No. | of teeth. | spec. lected. . specimen. |
7 | 2682 | 4 jJAdult.| Chihuahua river & trib's.| 1855 | Jno. Potts, Esq....| Alcoholic.) Jn». Potts, Еяд........

2. CAMPOSTOMA FORMOSULUM, Grd.
Pirate XXV, 1108. 5—8.

Брес. Снлв.--Тһе head is а little less than the fifth of the total length, and so also is the caudal fin. It resembles more С.
anomalum than C. ornatum ; the most conspicuous difference consists in the presence of larger scales, the posterior margin of
which being scalloped. The radiating furrows are very conspicuous, occupying the posterior section of the scale only.

Syn.—Campostoma formosulum, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 176.
The ground color of the dorsal region is dark purple, with scattered black irregular spots ;
beneath yellowish brown. The dorsal fin and the base of the caudal exhibiting a black patch.
Plate ХХУ, fig. 5, represents Campostoma formosulum, size of life; fig. 6, a scale from the
dorsal region ; fig. T, a Beats from the lateral line; and, fig. 8, a шин, from the abdominal
region.

List of specimens.
Catal.| Cor No. Ко. of| Age. Locality. When col- |Whence obtained Orig’! Nature of | | Collected by—
No. | of teeth. | spec. lected. | No. | specimen. |
| |
16] 2681 |15 |Adult. Rio Sabinal,trib.of Rio| 1854 | Major Emory... | ^ s Alcoholic.| Dr С.В. Kennel *
` 5 | San Antonio, Texas. | | us |
| e Е |

а mes

42 UNITED STATES AND MEXICAN BOUNDARY.

3. CAMPOSTOMA NASUTUM, Grd.
Рілте XXV, Fies.. 9—12.

Spec. Снав.-- It is a short and rather compact species, with the peduncle of the tail rather tapering. Its most prominent

character consists in its thick and protruding snout, which overlaps the lower jaw more than in the species above referred to.
` The head enters four times and a half in the total length. The scales are proportionally larger than in any ofthe known species

of this genus.

Зум.— Campostoma nasutum, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 176.

The ground color is greyish above, and whitish or yellowish beneath ; upper region of body
and flanks occasionally marmorated. А black patch at the base of the caudal and dorsal fins.

Plate XXV, fig. 9, represents Campostoma nasutum, size of life; fig. 10 is a scale from the
dorsal region ; fig. 11, a scale from the lateral line; and, fig. 12, a scale from the abdominal
region. |

List of specimens.

| | | қазанына”
Catal. | | Cor, No. | No. of | Locality. | When со1- Whence obtained. | Nature of Collected by—
No. | of teeth. | spec | lected. specimen.
| | ..
| |
75 | 2680 | 10 | Cadereita, New Leon ....... 1853 | Lt. D. N. Couch..| Alcoholic. Lt. D. N. Couch......
та | 869 4 | Acapulco, New Leon, Mex..| 1853 | Мине do dic] do

1. DIONDA SERENA, Grd.
Рілте XXVI, Fros. 9—12.

Еркс. Снав.--Пв form is slender and elongated, the dorsal outline being nearly straight ; the head enters five times and а
half in the total length. The eye is large and circular; its diameter entering only three times in the length of the side of the
head. The insertion of the ventrals takes place immediately opposite the anterior margin of the dorsal fin. The pectorals are
long and slender, even more so than in D. episcopa.

Syu.— Dionda serena, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 177.
The dorsal region islight brown, the flanks and abdomen being silvery, with the scales of the
lateral line dotted with black, imitating spots. А black spot at the base of the caudal fin.
р 1,8: A2,7; С4,1,9, 8, 1,3; V8; P 13.
Plate XXVI, fig: 9, represents Dionda serena, size of life; fig. 10 is a scale from the dorsal
region ; fig. 11, a scale from the lateral line ; and, fig. 12, a scale from the abdominal region.

List of specimens.

|
Catal, | Cor. No. | No. of Locality. When col- |Whence obtained. | Nature of | Collected by—
No. | of teeth. spec. lected. specimens. |
| дан
43 2656 10 | Rio Sabinal, Texas.....| 1854 Major Emory....| Alcoholic.) Dr. C. B. Kennerly....-

2. DIONDA TEXENSIS, Grd.
. Eu 22. Prate XXVI, Fres. 21—24.

Брес. Снав.- a very characteristic species. "The body is rather deep upon its middle, and the lateral line somewhat
deflexed. Тһе head is quite small and sub-conical, entering five times and a half in the total length. Тһе eye is large and
circular. Тһе insertion of the ventral fin is placed a little posteriorly to the anterior margin ‘of the dorsal. The dorsal region is
greyish brown ; the abdominal region greyish white ; a diffused greyish black band may be observed along the middle of the
flanks, embracing the lateral line beneath, and a black spot at the base of the caudal. The ventrals and pectorals are yellow.

Бум. Dionda terensis, GRD. in Proc. Acad. Nat. Бе. Philad. VIII, 1856, 177.

|
|

ICHTHYOLOGY. | 43

Plate XXVI, fig. 21, represents Dionda texensis, size of life; fig. 22 is a scale from the dorsal
region ; fig. 23, a scale from the lateral line; and, fig. 24, a scale from the abdominal region.

List оў specimens.

байыш cme No. No. of Locality. When col-| Whence obtained. | Nature of | Collected by—
No. ‘of teeth. spec. | lected. specimen. |
| | |
| | |
44 2657 30 | Rio Nueces, Texas..... 1851 | Col. J. D. Graham. Alcoholic. по. Н. Сатк....-- к
| | *

>

3. DIONDA ARGENTOSA, Grd.
Pram XXVI, Fires. 5—8.

БРЕС. Cuan.—Has a small head and an obtuse snout, a rather slend 1 Ї dbody. The head constitutes two-elevenths
of the total length. "Тһе insertion of the ventrals is situated opposite the anterior margin of the dorsal. Тһе scales being
quite large, the lateral line is slightly deflected upon the thoracic region. Color of the dorsal region reddish brown ; sides and
abdomen as if painted over with silver or quicksilver. Fins olivaceous.

Svx.— Dionda argentosa, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 178.
Plate ХХХІ, fig. 5, represents Dionda argentosa, size of life; fig. 6 is a scale from the dorsal
region; fig. 7, а scale from the lateral line; and, fig. 8, а scale from the abdominal region.

List of specimens.

Catal. Cor. No. | No. of ' Locality. When Whence obtained. | Nat f speci Collected by—
No. | of teetn. | spec. collected.
|
32 | 2646 10 | San Felipe creek, Tex. 1851 Col. J. D. Graham} Alcoholic..........| John H. Clark...
33 | 9647 4 Devil's river, Texas 1851 do

4. DIONDA CHRYSITIS, Grd.
Prate XXVI, Fres. 18—16.

Брес. Cnan.— Very slender and compressed; head very small and obtuse, contained six times in the total length. Eyes large
and circular. Origin of ventrals opposite the anterior margin of dorsal. Upper surface of head tuberculous. Scales large.
Dorsal region reddish brown ; sides and abdomen as if painted with gold. А black spot upon the base of the caudal fin Fins
themselves yellowish or olivaceous. :

Syn.—Dionda chrysitis, Сар. in Proc. Acad. Nat. Sc. Philad. УШ, 1856, 178. ;
Plate XXVI, fig. 13, represents Dionda chrysitis, size of life; fig. 14, a scale from the dorsal
region ; fig. 15, a scale from the lateral line; and, fig. 16, a scale from the abdominal region.

List of specimens.

Catal. | Cor. No. | No.of Locality. When | Whence obtained. | Nature of Collected by— 5
No. | of teeth. | spec. collected. | specimen,

ë

37| 9651 | 20 | Live Oak creek, Texas..| 1851 | Col. J. D. Graham. Alcoholic .. Јова Н.Сш............

*

44 UNITED STATES AND MEXICAN BOUNDARY.

5. DIONDA MELANOPS, Grd.
Prae XXVI, Fres. 17—20.

SPEC. Снав.--А rather short and deep body characterizes this species. The head is proportionally well developed, forming
less than the fifth of the total length. Тһе snout is conical and not abruptly truncated. Тһе insertion of the ventrals is situ-
ated somewhat posteriorly to the anterior margin of the dorsal. Scales large. The dorsal region is blackish ; the sides and
abdomen are dotted with black upon a bluish lead ground, giving the whole fish a dark appearance. А black spot upon the
base of the caudal fin.

Syn.—Dionda melanops, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 178.

Plate XXVI, fig. 17, represents Dionda melanops, size of life; fig. 18 is a scale from the
dorsal region ; fig. 19, a scale from the lateral line ; fig. 20, a scale from the abdominal region.

List of specimens.

Catal. |Cor. No. Хо. of Locality. When Whence obtained. Nature of Collected by—
No. |ofteeth.| spec. | collected. specimen.

Lieut. Couch......-

|
38 | 2652 5 | Buena Vista, Coahuila......| 1853 Lieut. D. N. Couch...| Alcoholic . |

. * 6. DIONDA COUCHI, Grd.
PLATE ХХХІ, Fries. 1—4.
Брес. Cnan.— Though closely allied to the preceding, it may readily be distinguished from it by a more elongated body and

more elongated head. Тһе snout is rounded. Тһе eye is circular and of medium size. Тһе ventrals are inserted posterior to
the anterior margin of the dorsal. Тһе scales are quite large. Upper regions greyish black , sides and abdomen yellowish or
whitish, either unicolor or maculated. А black spot upon the base of the caudal
Syn.—Dionda couchi, Скр. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 178.
Plate XXVI, fig. 1, represents Dionda couchi, size of life; fig. 2, а scale from the dorsal
region; fig. 3, a scale from the lateral line; and, fig. 4, a scale from the abdominal region.

List of specimens.

Catal. Cor. Мо. |Хо. of Locality. When Whence obtained. Nature of Collec'ed by—
No. | of teeth. spec. collected. à specimens.

+.
=
.
.
.
.
.
.
>

i Guajuco, New Leon........ 1853 Lieut. D. М. Couch...| Alcoholic ..| Lieut. Couch.......
41 | 9654 9 | Monterey, N. Lis С туз» | 1859 до до до
42 | 9655 4 | Qadereita, N. Бел ас 3 до до до

ALGOMA, Girard.

GEN. Cuar.—Partakes, in а measure, of the characters of Hyborhynchus and Pimephales. The teeth are of the cultriform
kind, of the grinding ii resale © рај а single row of four: 4—4. Тһе grinding surface is nearly linear, іп which respect
the teeth resemble more Pimephales than of Hyborhynchus. 'The pharyngeal bones do not differ materially in these
genera. Тһе head is ٢ 2 " the mouth small, with the lower jaw shortest, and overlapped by the upper, a
feature also noticed in ече. The isthmus is of a moderate size ; the eye well developed. The insertion of the ventrals
takes place posterior to the anterior margin of the dorsal The latter is higher than long, without a short and thick ray
anteriorly. The anal is shaped like the dorsal. Тһе caudalis furcated. The scales are large, and deeper than long, furrowed
upon the posterior section only ; the lateral line sub-median, is slightly deflexed upon the abdomen.

Бух.--Лівота, Gro. in Proc. Acad, Nat. Sc. Philad. уш, 1856, 180.
The large scales will serve to distinguish, upon a first glimpse, this genus from both
Пуботруасвиз and Pimephales. x тэг š

ж

.

ICHTHYOLOGY. 45

1. ALGOMA AMARA, Grd.
Рілте XXVII, Eres. 17—20.

SrEc. СнАв.--Неа4 constituting about the fifth of the total length. Теп rows of scales upon the line of greatest depth, five
above the lateral line and four beneath it. Тһе upper surface of the head and паре is flattened, as in Hydrargyra and Fundulus.
Syn.— Поста amara, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 180.
The dorsal region is of a pale red, the sides are silvery, whilst the abdomen is whitish.
D1,8;.4323,8; OCT, 1,9, B, 1; نا‎ V ELLE 31508186,
Plate XXVII, fig. 17, represents Algoma amara, size of life; fig. 18 is a scale from the
dorsal region; fig. 19, a scale from the lateral line; and, fig. 20, a scale from the abdominal

region.

List of specimens.

Catal. Cor. No Хо. of Locality. When Whence obtained. | Nature of Collected by—
No. |оЁ teeth.| spec. collected. specimen.
| | |
1494 75 1 Laguna, near Fort Brown, Тех. 1853 Maj. Emory | Mente Jno: Н. Clark. ;....

2. ALGOMA FLUVIATILIS, Grd.
PLATE XXVII, Fres. 18—16.

SPEC. CHan.— This species has the general aspect of a young Campostoma, and might easily be taken as such. Its mouth
and eye are smaller than іп the preceding species. Тһе upper lobe of the caudalis longer than the lower lobe. There are
also ten longitudinal rows of scales upon the line of greatest depth. Тһе upper surface of the head exhibiting numerous small |
spiny tubercles, as fishes sometimes have during the breeding season.

Syv.— Algoma fluviatilis, GRD. in Proc. Acad. Nat. Зе Philad. VIII, 1856, 180.
Color reddish brown above; yellowish brown beneath.
РАС АВ لع ق یا‎ 075 114 VB: P ТІ.

Plate XXVII, fig. 13, represents Algoma fluviatilis, size of life; fig. 14 isa scale бею the
dorsal region; fig. 15, a scale from the lateralline; and, fig. 16, a scale from the abdominal

region.
г ж
List of specimens.
| | |
Catal. |Cor. No. No. of | Age. Locality. When Whence obtained. | Natureof | Collected by—
No collected. | specimen.

< (of teeth. spec.
|

| - |
9196 | 1 | Adult| Near Monterey, New Leon. 1853 | Lt. D. N. Couch.... Alcoholic. Lt. D. N. Couch....

COCHLOGNATIIUs, B. +

Gen. Снав.—Опдег the external aspect of Pimephales, it presents that unique peculiarity in the cyprinoid family, of having
spoon-shaped bony expansions of the jaws. There is one on each side on the upper as well as on the lower jaw, exactly as in
the genus Tetraodon; their edge being sharp and cutting. Тһе head is short and the snout very blunt. Тһе dorsal fin has the
structure of that of Pimephales; the insertion of the ventrals is situated under the anterior те сені the dorsal, the caudal

46 UNITED STATES AND MEXICAN BOUNDARY.

being furcated. The scales are large, deeper than long, the lateral line following the middle of the flanks. The isthmus із
rather wide. The pharyngeals have the same shape and form as in Pimephales; the teeth, however, are more slender and
concave upon the grinding surface, giving them the appearance of being bent backwards. They are cultriform, of the grinding
type, a little more conspicuously hooked, and disposed upon a single row of four : 4—4.
Syn.—Cochlognathus, B. б С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 150.—Gap. in Proc. Acad. Nat. Sc. Philad.
VIII, 1856, 181.

We are acquainted so far with but one species of this genus, referred to hereon.
COCHLOGNATHUS ORNATUS, B. & G.

Рілте XXXV, Fras. 12—17.

Брес. Снак.—Неад forming two-ninths of the entire length; snout abruptly rounded off. Mouth proportionally small,
. terminal; its gape somewhat oblique. Eyes rather above the medium size ; their diameter being contained four times in the
length of the side of the head. Body much compressed, covered with large scales disposed upon twelve longitudinal series across
the line of greatest depth. Lateral line deflexed downwards upon the abdomen. Anterior margin of dorsal nearly equidistant
between the snout and the rudimentary rays of the caudal. Anal situated entirely backwards of the dorsal. Caudal furcated.
Insertion of ventrals situated opposite the anterior margin of dorsal ; tip of pectoral not reaching them.

Бум.-- Cochlognathus ornatus, B. & G. in Proc. Acad. Nat, Sc. Philad. УП, 1854, 158.--Сво. in Proc. Acad. Nat. Sc.

Philad. VIII, 1856, 181.

The outline of the scales is quite irregular; they are very much deeper than long, with rather
short radiating furrows on their posterior margin only.

р 1,8: Аб; С4, 1, 9, 8, 1,3; V8; P 12.

The colors, as preserved in alcohol, present а reddish brown ground, and а dark lateral band
or stripe. The dorsal fin exhibits two elongated dark spots—one anteriorly and basal, the other
posteriorly and nearer to its tip. The posterior half of the caudal has likewise a darker hue
than its anterior and basal half, which is of a dull orange, as is also its extreme margin.

Plate XXXV, fig. 12, represents Cochlognathus ornatus, size of life; fig. 13 exhibits the jaws
in profile, whilst fig. 14 is a front view of the same, the mouth being open ; fig. 15 is a dorsal
scale; fig. 16, a scale from the lateral line; and, fig. 17, а scale from the abdominal region.

List of specimens.

| |
Catal. No. | Сог. No. | No. of Age. | Locality. When со!- Whence obtained, Nature of
of teeth. spec. | lected. specimen.
|
!
|

| Brownsville, Texas.....#| 1859 | Captain Van Vliet........| Alcoholic.

150 9198 6 Adult ...

ALGANSEA TINCELLA, Grd.
Pram XXVII, Fras. 1—4.

Брес. Cuan.— The scales in this species are next in size to those of Л. obesa. There are about twelve rows beneath, and four-
teen above, the lateral line. І say about, because the specime үрэл

‚ аз most market specimens аге. The
insertion of the ventrals is situated a little posteriorly to the anterior margin of the бар. The eye is smaller than in any of
the other known species of this genus.

+

Бум. — Leuciscus tincella, VALENC. in Cuv. & Val. Hist. nat. des Poiss. XVII, 1854, 393.
Algansea tincella, Ско. in Proc. Acad, Nat. Sc. Philad. VIII, 1856, 183.
Тһе scales are elongated, su sh ровы with radiating furrows upon their entire
periphery.

تس ام Uo‏

و و بب

ПРЕ
Leer

<<

ICHTHYOLOGY. 47

D19;A18;085 9/8 Бе тор
The color is reddish brown above, silvery on the sides, and whitish beneath.
Plate XXVII, fig. 1, represents Algansea tincella, size of life ; fig. 2 is a scale from the
dorsal region ; fig. 3, a scale from the lateral line; and, fig. 4, a scale from the abdominal

region.
List of specimens.
| | | |
Catal. Cor'g No. | No.of| Age. | Locality. Whencol- Whence obtained. | Nature of Collected by—
No. | of teeth. | врес. | lected. | specimen.
| |
195 2153 | 6 | Adult..| Near the City of 1852 | Major Wm. Rich.....| Alcoholic.| Major Wm. Rich...
| | Мехїсө. | | :

1, ARGYREUS OSCULUS, Grd.
Рілте XXVII, Fies. 9—12.

Spec. Снав.- Наз more the fascies of Л. atronasus than of any other of Из congeners, both by the outline of its body and
head, and the shape and position of the mouth. "The head is comparatively small, forming the fifth of the length, with the
exception of the fork of the caudal. Тһе eye is rather large and sub-circular, its diameter entering about four times in the
length of the side of the head. Тһе dorsal and anal fins are well developed, the former being convex superiorly, and the latter
sub-convex exteriorly. The posterior margin of the caudal is crescentic. "The posterior extremity of the ventrals extend as far
as the vent, which is not the case in 4. dulcis and А. nubilis. ;

Syn .—Атрутеиз osculus, GRD. іп Proc. Acad. Nat. Sc. Philad. VIII, 1856, 186.
The anterior two rays of both the dorsal and anal fins are mere rudiments, as elsewhere stated.
D23,8; A2, 7; СРЕ R ҮЗ 32185

The color is reddish brown above ; olivaceous on the sides, with numerous dark blotches and
dots. Beneath uniform yellowish white, or silvery white.

Plate XXVII, fig. 9, represents 4rgyreus osculus, size of life; fig. 10 is a scale from tho
dorsal region ; fig. 11, a scale from the lateral line ; and, fig. 12, а scale from the abdominal
region.

List of specimens.

Catal. Сога No. | No.of '* Locality. Whencol-| Whence obtained. | Nature of Collected by—
No. | of teeth. | spec. lected. specimen.
50 2663 10 | Babocomori river, trib. of San} 1851 Col. J. D. Graham..,.| Alcoholic. | Jno. Н. Clark..... “
Pedro river: Gila. à

3 2 -8. ARGYREUS NOTABILIS, Grd.
Рілате XXVII, Fras. 5—8.

This species resembles А. osculus in many respects, but will always be easily Кылы
from it by a more truncated snout, and, consequently, by a mouth not so deeply cleft. The dorsal
fin is situated more anteriorly also. The scales are sub-elliptical, о ө, exhibiting some-

48 UNITED STATES AND MEXICAN BOUNDARY.

times radiating furrows upon the anterior as well as upon the posterior sections; they are
proportionally smaller than in A. osculus, and somewhat more elongated. The ground color is
yellowish brown above, golden or orange beneath, covered all over, the abdominal region
excepted, with small black spots.

Syn.—Argyreus notabilis, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 186.

Plate XXVII, fig. 5, represents Argyreus notabilis, size of life; fig. 6 is a scale from the
dorsal region ; fig. 7, à scale from the lateral line; and, fig. 8, a scale from the abdomina

region.
List of specimens.
Catal.| Cor'g No. |No. of Locality. When coll Whence obtained Nature of | Collected by—
No. | ofteeth. |spec. lected. specimen. |
49 9669 4 | Rio Santa Cruz, Sonora.| 1851 Col. J. D. Graham .. Aleoholie. John H. Clark
|

AGOSIA, Girard.

Gen. Cuar.—Snout rounded, slightly protruding beyond the lower jaw, though the mouth opens horizontally. Тһе mouth
is of medium size, surrounded with narrow and smooth lips, and provided upon its angle with a very small barbel. Тһе isthmus
is of moderate width. Тһе insertion of ventrals issituated opposite the anterior margin of dorsal fin, which is higher than long.
The caudal is furcated. The scales are minute, somewhat longer than deep, with radiating furrowsallaround. The pharyngeal
bones are expanded upon their curvature. "The teeth are ef the prehensile kind, of the hooked type, provided with a grinding
surface, strongly hooked, and disposed thus: 4—4, that is, upon one single row of four.

Syn.—fgosia, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 186.

Now, comparing the above with the characters assigned elsewhere to Argyreus, we find that the
most prominent difference resides in the pharyngeal teeth. The isthmus is narrower also, and the
insertion of the ventrals placed further backwards. *

1. AGOSIA CHRYSOGASTER, Grd.
PLATE XXVIII, Fras. 5—8.

Брес. Снав.--Неад forming a little more than the fifth of the total length. The posterior extremity of the maxillary extends
to the vertical line of the anterior rim of the orbit. The eye is large and circular ; its diameter being contained about four times
in the length of the side of the head. The anterior margin of the dorsal is somewhat nearer the extremity of the snout than the
insertion of the caudal fin.

SvN.—.gosia chrysogaster, GRD. in Proc. Acad. Nat. бе. Philad. VIII, 1856, 187.

А minute rudimentary ray at the anterior margin of both the dorsal and the anal fins is not

included in the following numbers.
D10; تا وو که‎ 51,9 5,15: VO ^ P 16.

"Тһе scales are obscurely sub-quadrangular, conspicuously longer than deep, with a proclivity
of being deeper posteriorly than anteriorly.

The region above the middle of the flanks is reddish brown, spotted or dotted with black,
especially upon the head ; a black streak separates this region from that beneath, which is
unicolor, of a golden hue.

€

E] ICHTHYOLCGY 49

Plate XXVIII, fig. 5, represents Agosia chrysogaster, size of life; fig. 6 being a scale from
the dorsal region ; fig. 7, a scale from the lateral line ; and, fig. 8, a scale from the abdominal

f region,
! List of specimens.
2 1 1
б | Catal. Сог'о №. No.of | Age. Locality. When Whence obtained. | Natureof | Collected by—
No. | of teeth. | spec. collected. specimen.
|
81 2684 8 маш. Rio Santa Cruz, Sonora..| 1851 Col. J. D. Graham.... Alcoholic. Јао. Н. Clark...,
ie i “p pes қысыла ыы

И | 2, AGOSIA METALLICA, Grd.
PrarE XXVIII, Fres. 1—4.

Брес. Cuar.—This species is somewhat shorter than the preceding one. It is very characteristic, and easily distinguished
from its congener. The head is shorter and the snout more abruptly rounded. The eye is smaller also. The body is more
gracefully sub-fusiform and compressed. The dorsal is higher and narrower, rounded superiorly. The posterior margin of the
caudal is crescentic, less furcated than in 4. chrysogaster.

Syn.—Agosi га са, бер. in Proe. Acad. Nat. Sc. Philad. VIII, 1856, 187.

The formula of the fins’ rays present also some differences :
19: ВАРА 1 5 8125; Ү8- rb.

The same is true with regard to the rudiment at the anterior nee of the dorsal and anal
fins, and which must be sought for under the skin.

The scales are but slightly longer than deep, rather tapering posteriorly, giving to their
outlines a somewhat ovoid appearance. e"

Upper regions greyish brown, dotted with black; ; inferiorly silvery and unicolor; a black
streak on the sides separating the two tints.

Plate XXVIII, fig. 1, represents Agosia metallica, size of life; fig. 2 is a dorsal scale; fig.
3, a scale from the lateral line ; and, fig. 4, a scale from the abdominal region.

List of specimens.

Catal. Cor. No. Мо. of} Age. Locality. When col-| Whence obtained. | Nature of | Collected by—

«Хо. of teeth.) spec. lected. specimen. |
| .

Adult. Rio San Pedro, trib, of Gila.
| |

85 | 9686 18511 Col. 3. D. бийип... Alcoholic. duo. Н. Син...

со

а
; GOBIO AESTIVALIS, Grd. -
U. 8. P. В. В. Expl. & Surveys—Fishes.—Prare ШҮП, Firas. 17—99.

Брес. Cuan.—Head contained about four times and a half in the total length. Differs from 6. gelidus and. С. vernalis, Из

: American Se by a rm er ape ner mip — ed arched upon its middle region and tapering rapid. ‘towards the
peduncle of the tail. 1 I g т eye larger, and the ventral fins inserte: | hat more
forwar |

Qu in Proc, Acad. Nat. Se. Phila. уш, n р. Да‏ د چیا

чармай
б

50 UNITED STATES AND MEXICAN BOUNDARY.

The scales are also larger, deeper than long, anteriorly sub-truncated and posteriorly

rounded, with radiating furrows upon the latter section only.
ет быт P П.

Тһе coloris yellowish brown, somewhat lighter beneath than above, with a silvery streak
along the middle of the flanks.

Plate LVII, (U. S. P. В. В. Expl. & Surveys) fig. 17, represents, size of life, Gobio aestivalis;
fig. 18 is the head seen from beneath, exhibiting the outline of the mouth ; fig. 19, a dorsal
scale; fig. 20, a scale from the lateral line; and, fig. 21, a scale from the abdominal region.

List of specimens.

Catal. No. |No. of spec.

|
Locality. |When collected. Whence obtained. | Nat f specimen

79 1 | Rio San Juan, near Cadereita, New Leon.. 1853 | Lt. D. М. Conch....| Alcoholic
|

MEDA, Girard

%

Сех. Снак.—Воду elongated, slender, compressed, T in its profile, and scaleless. The lateral line may be traced
along the middle of the flanks, slightly deflexed upon the abdomen. The head is elongated, sub-conical, rounded upon the
snout, without being truncated. The mouth is ымы large, sub-terminal, its gape slightly oblique upwards, the lower
jaw fitting into the upper. No barbels. Тһе eye large and circular. Тһе isthmus narrow. Dorsal fin higher than long,
provided anteriorly with a stout, articulated, but simple and osseous ray, grooved posteriorly, and nearly as high as the second
ray, which is slightly higher, and the highest of all. Тһе ventrals are inserted in advance of the anterior margin of the dorsal,
and adherent to the ventral line for more than the half of their total length. The caudal is deeply furcated. The pharyngeal
bones are slender, especially upon their inferior limbs, which are: longer than the upper ones. The latter are flattened or
expanded, and curved inwardly downwards. The teeth are very slender, sub-conical, compressed at their base, of the prehensile
kind, of the hooked type, without grinding surface. They аге disposed upon a double series of one and four: 1 | 4—4 | 1.
Thus equally distinct from both Phoxinus and Phozinellvs, to which this genus bears an external resemblance.

Бум.— Леда, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 191.

The genus here referred to differs widely from all other American cyprinoids by the presence,
upon the anterior margin of the dorsal, of a stout undivided (but articulated) ray, resembling
in its general appearance that which is observed in Barbus, Luciobarbus, Scaphiodon, and
Systomus, differing, however, from all of these in the structure of its posterior edge, which is
grooved instead of being serrated. The absence of buccal barbels in Meda is another feature to
warrant its claims as a genus, differing from Cyprinus, Carassius, Carpio, &c., by characters
equally obvious.

MEDA FULGIDA, Grd.
Pirate XXVIII, Fries. 9 & 10.
Брес. Cnan.—Head constituting a little more than the fifth of the total length. The angle of the mouth corresponds to а

vertical line drawn in advance of the orbit. The broad insertion of the ventrals is equally characteristic.
Syn.—Meda fulgida, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 192.

. The dorsal region is reddish yellow, the middle of the flanks appearing as though painted
with silver, whilst the inferior region is of a pale yellow,

D9; A1,11; 05,1, 9,8, 1,4; УТ; P 15.

г

асары л тысу‏ در ې سه

|

ICHTHYOLOGY. 51

Plate XXVIII, fig. 9,is a mere outline of Meda fulgida, double the natural size, whilst fig. 10
represents it size of life.

List of specimens.

| | oe Таб
Catal. | Сог. No ко. of | Locality. | When collected. | Whence obtained. | Nature of | Collected by—
No. of teeth 6 specimen. |
aeaa |
154 9130 | 10 | | Rio San Pedro, trib of Gila.. 1851 Col. J. D. Graham .| Alcoholic . | Jno. Н. Clark...
|

OLIOLA VELOX, Grd.
Рілте XXXI, Fres. 21—24.

Брес. Cuar.—A very slender and elegant species, differing from C. vigilar by a more conical head, much lgrger eyes, and
larger scales. The latter are much deeper than long, with radiating furrows upon the posterior section alone. А black spot

may be observed upon the anterior margin of the dorsal fin.

Syn.—Cliola veloz, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 192.

The ground color is olivaceous, with the middle of the flanks silvery ; а black streak follows
the course of the lateral line. A black spot exists also upon the base of the caudal fin.

Plate XXXI, fig. 21, represents Cliola veloz, size of life; fig. 22 is a scale from the dorsal
region; fig. 23 a scale from the lateral line; and, fig. 24, a scale from the abdominal region.

List of specimens.

|
Catal. Cor. Хо | No. of. | Locality. ‘When col Whence obtained. | Nature of| Collected by—
No. of teeth.) spec. | | lected. specimen.

| | | ;
29 9643 9 | San Pedro сгеек, tributary of Rio 1854 2 Major Emury.......| Alcoholic. Dr. C. B. Kennerly.
| San Antonio, Texas. | |

| |

1. ALBURNELLUS AMABILIS, Grd.
ig ХХІХ, Fras, 10—13.

This ів a very slender and айна species, about two inches and a half in total length. The

head constitutes the fifth of the length, and the greatest depth, the sixth.
ръз: АЛ, ЧУ 0355552; VS; Е ЈЕ

There are nine longitudinal rows of scales upon the flanks, between the insertion of the
ventral fins and the dorsal fin. Тһе lateral line, as usual, follows the fourth row above the |
ventrals. "The color is dark reddish ичи, silvery upon the flanks. A black patch upon the |
base of the tail. =

Syn.—Alburnus emabilis, Genin Boos. And. Nat. Se. Philad. УШ, 1856, 193. | Í bo

Plate XXIX, fig. 10, represents Alburnellus amabilis, size of life; fig. 11 is a sca e from the
dorsal region ; fig. 12, a scale from Ме lateral line; and, fig. m а le from t 4 2 ominal
region. се

52 UNITED STATES AND MEXICAN BOUNDARY.

List of specimens.

Catal. |Сог, Мо, No. of Locality. When Whence obtained. | Natureof| Collected ђу—
No. of teeth. spec. collected. specimen.
79 9677 15 | Rio Leona,trib. of Rio Nueces, Tex..| 1851 Col. J. D. Graham. .| Alcoholic.| John H. Clark..

2. ALBURNELLUS MEGALOPS, Grd.
Prate XXIX, Fres. 1—4.

Resembles А. amabilis in general traits, being slender and graceful, but easily distinguished
from it by a shorter and more rounded snout and a larger eye. The coloration is the same, with
the exception of the black caudal patch, which does not exist here. The average size of the
specimens before us is about two inches in total length. š

Syn.—Alburnus megalops, GRD. іп Proc, Acad. Nat. Sc. Philad. VIII, 1856, 193.

Plate XXIX, fig. 1, represents Alburnellus megalops, size of life; fig. 2 is a dorsal scale; fig.
3, a scale from the lateral line; and, fig. 4, a scale from the abdominal region.

List of specimens.

Catal. | No. of Locality. When Whence obtained. Nature of Collected by—
No. | spec collected. specimen.

69 90 | San Felipe creek, Texas.........| 1851 Col. J. D. Graham .....| Alcoholic.| John H. Clark

3. ALBURNELLUS 500105, Grd.
PHATE XXIX, Fras. 14—17.
Resembles 4. megalops by its snout and eye. Тһе total length is two inches and three-
quarters, the head forming the fifth part of it. The greatest depth is a little less than the

length of the head. The dorsal region is olivaceous, the flanks silvery, and the belly yellowish.
Opercular apparatus golden.
SvN.—Alburnus socius, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 193.
Plate XXIX, fig. 14, represents Alburnellus socius, size of life; fig. 15 is a dorsal scale; fig.

16, a scale from the lateral line; and, fig. 17, a scale from the abdominal region.

_ Last of specimens.

| | гая 1
Catal. Cor. Хо. No. of | Locality. When Whence obtained. | Nature of Collected by—

No. lof teeth. spec. collected.
| |

specimen.

70 | 2676 | 30 | Live Oak creek, Техав.. 1851 | Col. J. D. Сліва... Aleobolie, John Н. د کل‎

—

PI a s БС еса а. адо ык э ас аа 7٢ - а ا‎ ЖЫ,

ICHTHYOLOGY. 53

CODOMA, Girard.

Gen. Снав.--Неад short, snout rounded, terminated by a small mouth, the gape of which does not reach a vertical line
drawn in front of the orbit; there being no barbels а Из angle, and both jaws even. The isthmus is of moderate width. The
body is more or less elongated, compressed. The insertion of the ventrals is situated in advance of the anterior margin of the
dcrsal. "Тһе caudal is furcated, and, like the rest of the fins, rather small. The scales are of modium size, higher than long,
with radiating furrows upon their posterior section only, and the lateral line is but slightly deflexed upon the thoracic region.
The pharyngeals are moderately expanded upon their convexity. The teeth are of the raptatorial kind, of the hooked type,
compressed, without grinding surface, instead of which, a sharp but not serrated ridge. They are arranged upon one single
row of four, thus: 4—4

Syn.—Codoma, Gro. Proc. in Acad. Nat. Sc. Philad. VIII, 1856, 194.

The general physiognomy of the genus reminds us of those of Pimephales and Cochlognathus,
with which genera it has no intimate affinities, when the pharyngeal dentition is taken into
consideration. Indeed, its affinities with Cyprinella and Moniana are of a more close character,
for, the teeth are constructed upon the same general pattern; from Cyprinella, however, it
differs by the presence of one single row of teeth, and from Moniana by the absence of serratures
upon the cutting edge of the teeth, and finally from both Cyprinella and Moniana by smaller
scales, the course of the lateral line, and the short and rounded head.

1. CODOMA ORNATA, Grd.
Рілте XXIX, Fros. 22—25.

Брес. Снав.--Тһе head, which is short and rounded off, forms the fifth of the total length, whilst the greatest depth enterg
in the latter but three times and а half. Тһе eye is circular and well developed ; its diameter entering somewhat more than
three times in the length of the side of the head. "The anterior margin of the dorsal is a little nearer the extremity of the
snout than the insertion of the caudal fin.

Syn.—Codoma ornata, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 195.

The coloration is rich and profuse, the upper regions are purplish black, with transverse
bands of the same hue from the head to the base of the caudal fin; the space not occupied by
these, on the back as well as on the abdomen, is of a golden orange red. Тһе fins are purplish
black, edged or tipped with golden yellow or pure white.

21:85 A1,7;00,1, 9,5,1 6; V V; Р 12.

Plate XXIX, fig. 22, represents Codoma ornata, size of life; fig. 23 is a scale from the
dorsal region ; fig. 24, a scale from the lateral line; and, fig. 25, a scale from the abdomina]
region. 4

List of specimens.

Хо. of teeth. collected. specimen.

Catal. Сог. No. нь. of| Age. | Locality. | When 66 سن‎ Nature of | Collected by—
| spec. |

—

4 Adult. Chihuahua river and tributaries.....| 1855 Jno. Potts, Esq .| Alcoholic.| Jno. Potts, Esq .

|
91 | 9691 |

2. CODOMA VITTATA, Grd.

Pram XXIX, Fres. 18—21.

Брес. Снав.--Нав a more elongated body and sub-fusiform outline than the preceding species. Тһе head. ii Title
less than the fifth of the entire length, whilst the depth enters in it about four times and a half. Тһе eye is much smaller than
in C. ornata ; the fins and scales are smaller also.

Syn.— Codoma vilatta, Ско. in Proc. Асай. Nat. Se. Philad, VIII, 1856, 195.

51 UNITED STATES AND MEXICAN BOUNDARY.

The upper regions are purplish brown; & silvery band along the middle of the flank ;
inferiorly yellowish orange. Fins unicolor ; the superior ones greyish, the inferior yellowish.
ръзс 43.15; 011, 9%; 8 196; УТ, Р 14.

Plate XXIX, fig. 18, represents Codoma vittata, size of life; fig. 19 is a dorsal scale; fig:

20, a scale from the lateral line; and, fig. 21, a scale from the abdominal region.

List of specimens.

Catal. | Cor. Хо. No.of| А e. | Locality. When collected. Whence obtained. | Nature of | Collected by—
No. lof teeth. spec. | | specimen.
| :

|
|
|
|

92

| | | |
9603 | 10 | Adult, Valley of Mexico. .... 1855 Ло. Potts, Esq ..| Alcoholic ...| Jno. Potts, Esq ..
| | |

!

1. CYPRINELLA МАСБОБТОМА, Grd.
PLATE ХХХІ, Fres. 5—8.
This species is very characteristic. Тһе body is deep upon its middle, tapering posteriorly.
The head is sub-conical, with a prominent snout and a very large mouth. Тһе eyeis well
developed. Тһе ventrals are inserted somewhat in advance of the anterior margin of the

dorsalfin. Тһе ground color is reddish, with a silvery streak along the middle of the flank,
extending likewise over the opercular apparatus.

Syn.—Cyprinella macrostoma, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 198.
Plate XXXI, fig. 5, represents Cyprinella macrostoma, size of life; fig. 6 is a scale from the

dorsal region; fig. 7, a scale from the lateral line; and, fig. 8, a scale from the abdominal region.

List of specimens.

|
Catal. Cor. No. N o.of Age. Locality. | When Whence obtained. Nature of Collected by—
No. of teeth. spec. | collected. specimens.
| | | | Š ЖАСЫ;
АЯЗ Lis Fog | Adult.| Devil's river, Texas.. Ч 1851 Col. J. D. Graham....|Alcoholic. | John Н. СізгЕ........
130 | 9211 | Oh le ee wey | China, New Leon..... | 1853 Lt. D. N. Couch do Lt. D. N. Couch. ....-

2. CYPRINELLA VENUSTA, Grd.
PLATE XXXI, Fres. 1—4.

Gracefully compressed and fusiform in profile. The snout protruding and sub-conical. The
species is related to C. macrostoma, from which it chiefly differs by the relative size of its
mouth and shape of the body. Тһе ventrals are likewise inserted somewhat in advance of the
anterior margin of the dorsal. Greyish red above, pale beneath; sides silvery. А black
patch at the base of the caudal fin.

Syn.—Cyprinella venusta, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 198.

Plate ХХХІ, fig. 1, represents Cyprinella venusta, size of life ; fig. 2 is a dorsal scale; fig. 3,
a scale from the dorsal region ; and, fig. 4, a scale from the abdominal region,

m ^ Tu —

ICHTHYOLOGY. 55

List of specimens.

| |
Catal. Сог. Мо. Хо. of | Age. _ Locality. When col-| Whence obtained. |Orig’l| Nature of Collected by—
No. jof teeth. spec. | lected. No. proce
| Ч
140 | 9719 15 Adult. Rio Sabinal, Texas | 1854 | Major Emory ...... 119 Alcoholic. Dr. C. B. Kennerly.

3. CYPRINELLA TEXANA, Grd.
PLATE ХХХІ, 1105 9—12.

Body very slender and fusiform; head small and sub-conical ; mouth small; eye large.
Ventrals inserted under the anterior margin of the dorsal. Color reddish brown, sides silvery ;
black dots along the lateral line, terminating into a black spot at the base of the caudal fin.

Вух.— Cyprinella texana, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 198.

Plate XXXI, fig. 9, represents Cyprinella texana, size of life; fig. 10 is a dorsal scale;

fig. 11, a scale from the lateral line; and, fig. 12, a scale from the abdominal region.

List of specimens.

| Whence obtained. | Nature of `` Collected by—

| specimen.

Catal. | Cor. No. No. of Locality. When
No. of teeth. spec. | collected.

| -
1281! 9710 9 | Rio Salado, Техав...... 1851 | Col. J. D. Graham.....- Aleoholic.| Зора Н. Clark .........
197 |........| 1 | Turkey creek, Texas.... 1851 | d i

|

|
|
!
|
|
|

4. CYPRINELLA LUXILOIDES, Grd.
Prate XXXI, Fres. 18—16.

At firstsight this species, in its general aspect, remind us of certain species of Lucilus:

Тһе body being deep, gradually tapering away forwards and backwards. Тһе head is well

developed and the mouth also. Ventrals inserted slightly in advance of the dorsal. The
scales are quite narrow and deep. Reddish brown above ; silvery beneath.
Svx.— Cyprinella luxiloides, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 198.
Plate XXXI, fig. 13, represents Cyprinella luxiloides, size of life; fig. 14 is a dorsal scale;
fig. 15, a scale from the lateral line; and, fig. 16, a scale from the abdominal region.

° List of specimens.
Catal. | Хо. of| Age. Locality. When ` Whence obtained. Orig. Nature of
No. | spec. 5 . | collected. No. |specimen.

‚ San Pedro creek, trib. of
|- Rio San Antonio, Тек. ....—-

Major Emory ........| 108 Alcoholic. D

56 UNITED STATES AND MEXICAN BOUNDARY.

1. MONIANA AURATA, Grd.
Pram XXX, 166. 13—16.

A most handsome species, with a rather deep body gradually tapering posteriorly, and a
rounded and sub-truncated head bearing minute spines upon its upper surface. The eye is pro-
portionally small, and the mouth of medium size. Chestnut brown above; a diffused blackish
streak along the middle of the flanks ; golden beneath.

Syn.—Moniana aurata, Grp. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 200.

Plate ХХХ, fig. 13, represents Moniana aurata, size of life; fig. 14 is a scale from the

dorsal region ; fig. 15, a scale from the lateral line; and, fig. 16, a scale from the abdomina]

region.
List of specimens.
Catal. Corresponding No. of | Age. Locality. When Whence obtained. | Nature of Collected by—
No. | No. of teeth. | spec. collected. specimen.
118 2703 20 | Adult, Piedra Painte,N.M 1851 Col. J. D. Graham..| Alcoholic -| John Н. Clark... -- --
|

2. MONIANA COMPLANATA, Grd.
Pram XXXI, Fras. 17—20.

The most compressed of all the species so far known. Тһе profile is regular; the peduncle
ofthe tail rather slender. Тһе total length is two inches and a half, the head entering in it
five times and a half. The mouth and eye are of but moderate size. Scales large and very
deciduous. Pale red above, silvery on the sides, and yellowish beneath.

Syn.—Moniana complanata, Gro. in Proc. Acad. Nat. Sc. Philad. УШ, 1856, 200.

Plate XXXI, fig. 17, represents Moniana complanata, size of life; fig. 18 is a dorsal scale ;

fig. 19, a scale from the lateral line; and, fig. 20, a scale from the abdominal region.

List of specimens. М
Catal. | Cor. No. | No. of Locality. When col- | Whence obtained. Nature of Collected by—
No. |ofteeth.| spec. lected. specimen.
94 2694 3 | Brownsville, Texas... .....| 1859 Capt. Van Vliet.... | Aleoholic....| Capt. Van Vliet....

3. MONIANA FRIGIDA, Grd.
Ріате ХХХ, Frase 17—20.

This species is a little more than three inches in total length, and stands next to the largest
of the hitherto known species. Тһе head forms about the fifth of the length. Тһе body is

*

ICHTHYOLOGY. 51

rather deep and very much compressed ; the caudal Яп deeply furcated. The eye is circular,
and its diameter contained four times in the length of the side of the head.

The rays of the fins are:

о I AP

The color is of a reddish brown tint above; silvery white beneath. The middle of the flanks

exhibits an indistinct or rather diffused silvery, sometimes blackish band.
SyN.—.Moniana frigida, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 200.

Plate ХХХ, fig. 17, represents Moniana frigida, size of life; fig. 18, a dorsal scale; fig. 19,

a scale from the lateral line ; fig. 20, a scale from the abdominal region.

List of specimens.

Catal. | Corres. Хо. No. of | Age. Locality. When col Whence obtained. | Nature of | Collected by—
No. | ofteeth. | spec. lected. specimen.
100 2696 | 3 jAdult.| Rio Salado, Техаз-------- 1851 | Col. J. D. Graham...) Alcoholic.| John Н, Clark.
тт een es АРЫ 100 do do 1851 do do do
ЖАСЫ 10 |..40-.| Rio Sabinal, Техаз-.----- 1851 40 40 40
124 | 2707 | 20 |..40.. Rio Medina, Texas....... | 1851 do do do

4. MONIANA COUCHI, Grd.
Рілте ХХХ, Fires. 21—24.

Resembles М. gracilis most ; is, however, distinguished from it by a less fusiform body and a
much shorter head. This feature may be traced upon series of specimens of both species with
an unfailing constancy. Тһе eye is also smaller, and so is the mouth, as might be deduced
from the traits just alluded to.

Syn.—Moniana couchi, Gro. in Proc. Acad. Nat. Sc. Philad., VIII, 1856, 201.

Plate XXX, fig. 21, represents Moniana couchi, size of life; fig. 22, a dorsal scale; fig. 23,
a scale from the lateral line; fig. 24, a scale from the abdominal region.

List of specimens.

Catal. | Cor. No. | No. of | Age. Locality. When col- | Whence obtained.| Nature of | Collected by—
No. | of teeth. | spec. | lected. specimen.

103 2699 20 | Adult. China, New Leon, Мехісо.] 1853 Lt. D. N. Сопей.. Alcoholie..| Lt. D. N. Couch...

5. MONIANA RUTILA, Grd.
Pram ХХХ, Fras. 1—4.
Has the general physiognomy of М. gracilis, from which it differs by a more advanced position

of the dorsal fin, and by larger scales. Dorsal region greyish ; sides and abdomen golden.

Зтм. — Мотапа rutila, Gav. in Proc. Acad. Nat. Se. Philad. VITI, 1856, 201.
i

8

58 UNITED STATES AND MEXICAN BOUNDARY.

Plate XXX, fig. 1, represents Moniana rutila, size of life; fig. 2, a dorsal scale; fig. 3, a
scale from the lateral line; fig. 4, a scale from the abdominal region.
List of specimens.
| |

Catal. | Cor. No. | No. of | Age. Locality. When col-
No. |ofteeth.| spec. | lected.

Whence obtained. Nature of | Collected by—
specimen.
|

95 2698 10

Mexieo. |

|
|
| |
ana Cadereita, New Leon, 1853 | Lieut. D. М. Couch... Alcoholic -| Lieut. D. N. Couch.
| | |

6. MONIANA NITIDA, Grd.

'This species differs from М. couchi by а more elongated and fusiform body, more elongated
head, and much larger eye. From M. rutila it differs by the same characters of the body, but
the head differs by the flattening of its upper surface. "There are eleven longitudinal rows of
scales upon the line of greatest depth of the body, five above and five below the lateral line.
The latter, therefore, is nearly median, forming but a slight curve upon the middle of the
abdomen. Color pale red; sides of head and middle of the flanks silvery.

Syw.—Moniana nitida, Grp. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 201.

List of specimens.

| |
Catal. Cor. No. | No. of Locality. When

No. of teeth. spec.

Whence obtained. Nature of Collected by—

collected. specimen.

|
96 | 2695 | 2 Cadereita, New Leon, Мех. 1853 LE D: 24:10 oiii Alcoholic. | Lieut. Couch...---
| |

7. MONIANA FORMOSA, Grd.
Рілте XXX, Fras. 5—8. j

The prettiest species of the genus; the body is fusiform in profile and the tail very much
tapering. "The region above the lateral line is blackish brown in the adult, and reddish brown
in the young, occasionally also dotted with black; the inferior regions are reddish yellow
anteriorly and yellowish red posteriorly.

Syx.—Moniana formosa, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 201.

Plate XXX, fig. 5, represents Moniana formosa, size of life; fig. 6 is a dorsal scale; fig. 7,
a scale from the lateral line ; fig. 8, a scale from the abdominal region.

List of specimens.
Catal. | Cor. No. | Мо. of Locality. When col- Whence obtained. | Nature of СоПесей by—
No. of teeth. | spec. | lected. | specimen.
113 4 |
7 | | 2700 i p | Rio Mimbres, Mexico ....| 1854 | MajorEmory........ Alcoholic.| Dr. C. B. Kennerly --
| | |
Ч |

1
E ICHTHYOLOGY. 53
8 8. MONIANA GRACILIS, Grd.
А very graceful and slender species, resembling most М. lutrensis, from which it, however,
differs by а much smaller head and a more arched back ; the body itself being more compact. Ash
| grey above, yellowish white beneath ; flanks silvery.
Syn.—Moniana gracilis, Ско. in Proc. Acad. Nat. Sc. Philad. УШ, 1856, 201.
List of specimens.
Catal. |No. of Locality. When Whence obtained. Nature of Collected by—
No. | spec. collected. | specimen.
| | КІ
| 116 $ Acapulco, near Monterey, New Leon..| 1853 14. D. N. Couch..... Alcoholic.| Lieut. Couch...... -
Џ

9. MONIANA GIBBOSA, Grd.
Рглте XXX, Fras. 9—12.

May readily be distinguished from all its congeners by a short and arched body, resembling a
Cyprinodon as much as any fish we might compare it to. Pale reddish above; whitish beneath;

sides silvery.

SvN.—JMoniana gibbosa, Ско. in Proc. Acad. Nat, Sc. Philad. VIII, 1856, 201.

Plate XXX, fig. 9, represents Moniana gibbosa, size of life; fig. 10 is a dorsal scale; fig. 11,
a scale from the lateralline; and, fig. 12, a scale from the abdominal region.

дээ gini apr dioe

List of specimens.

| |
Catal. Хо. Хо. of spec. Locality. When | Whence obtained. Nature of Collected by—
: collected. | specimen.
105 3 Brownsville, Texas......| 1852 | Captain Van Vliet......| Alcoholie. Captain Van Vliet.......
| |

10. MONIANA РВОЗЕВРІХА, Grd.

Is remarkable for its slender body, sub-conical head, and very small mouth. Тһе eye is of
moderate development. The total length is two inches and a quarter, the head constituting
the fifth part of it. Eleven rows of scales may be counted upon the line of greatest depth of
the body. Greyish brown above; metallic greyish white upon the sides and beneath.

Syn.—Moniana proserpina, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 200.
List of specimens.

Catal. | Сог. No. | No.of Age. Locality. | When Whence obtained. petu of | Collected by—

No. |ofteeth.| spec. | collected. | specimen.

| |
1851 Col. J. D. Graham.... Зе

Joba Í Ситк........

114 2108 10 | Adult| Devil's river, Texas.. |

ж

60 UNITED STATES AND MEXICAN BOUNDARY.

LUXILUS LEPTOSOMUS, Grd.
Pra ХІХ, Fres. 9—12.

Spec. Cnan.—Outline regularly sub-fusiform ; the depth forming a little more than the fifth of the entire length. The head
enters five times and a half in the latter dimension. The anal fin is a great deal larger than the dorsal.

Syn.—Luzilus leptosomus, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 203.

The scales are larger than in any other species of the same genus ; they are about as deep as
long, anteriorly uneven, posteriorly rounded, with radiating furrows upon their posterior section
alone.

ПА ба 1,5; V 9; P 15.

Color greyish brown above ; light reddish beneath ; sides silvery. Edge of the furcated por-
tion of the caudal, blackish grey.

Plate XIX, fig. 9, represents Тл ив leptosomus, size of life; fig. 10 is a scale from the
dorsal region; fig. 11, a scale from the lateral line; and, fig. 12, a scale from the abdominal
region. (The scales are represented in a reversed position.)

List of specimens.
Catal.| No. of| Age. Locality. When Whence obtained. Nature of Collected by—
No. | spec. collected. specimen.
| | |
61 1 jAdult.| Dry creek, near Victoria, Тех. 1854 | Мау Emory... | Alcoholic. | D. C B. Kennetly...-
|

TIAROGA, Girard.

Gen. Снав.--Неай small, sub-conical, depressed. Mouth obliquely terminal, of moderate size, and without barbels of any
kind. Upper jaw slightly longer than the lower. Eye of medium size. Isthmus very wide. Body slender, sub-fusiform,
compressed. Fins are well developed ; dorsal and anal narrow and high; caudal fureated. "The insertion of the ventrals
takes place in advance the anterior margin of the dorsal. Тһе scales are small, deeper than long, with radiating furrows all
around ; the lateral line is median. The pharyngeals are similar to those іп Gobio. Тһе teeth are likewise of the same
character: slender, sub-cylindrical upon their base, compressed upwards, of the raptatorial kind, of the hooked type, without
grinding surface, and disposed upon a double row of one and three, thus: 1 | 3—3 | 1

SxN.— Tiaroga, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 204.

This genus bears some analogy to the Gudgeons (Gobio), differing from them by the absence
of barbels, either maxillar or buccal, and by а less prominent snout. .

TIAROGA COBITIS, Grd.
Prate XXVIII, Fras. 11—14.
Брес. Cuan.—Two inches and a half in total length, the head forming about the fifth part of it. Eyes approximating the
upper surface of the head, which is rounded.
SxN.— Tiaroga cobitis, Ско. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 204.

The scales are deeper than long, elliptical, with wide radiating pericentrical furrows.
” 2,8--1; A1, 7-1; 06, 1;9, 8, 1,5; V8; P 15.
The upper regions are brownish, with small blackish spots; the inferior regions are unicolor
of a yellowish tint. А black spot upon the base of the caudal fin.

ICHTHYOLOGY. 61

Plate XXVIII, fig. 11, represents Tiaroga cobitis, size of life; fig. 12 is a scale from the
dorsal region ; fig. 13, a scale from the lateral line; fig. 14, a scale from the abdominal region

List of specimens.

Catal. 2 No. | No. of Locality. When Whence obtained. Nature Collected by—
No. teeth. | spec. ы collected. of spec.
155 2731 10 | Rio San Pedro, trib. of ба... 1851 Col. J. D. Graham ...| Alcoholic.| Jno. Н. Clark...

1. GILA ELEGANS, В. & б.

Spec. Cnan.— Body very slender and caudal region very much attenuated. Head very much depressed, constituting about
the fifth of the total length ; eyes elliptical, their diameter entering seven times in the length of the side of the head. Posterior
extremity of maxillar bone extending to a vertical line drawn in advance of the orbit. Isthmus very small. Fins very much
developed. Scales sub-elliptical, narrower posteriorly than anteriorly ; radiating furrows few and obsoletely developed, Color
uniform reddish brown above, yellowish silver beneath ; fins dull yellow.

Syn.—Gila elegans, В. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 369; and, in Sitgr. Rep. Exped. Хай and Color.
Riv. 1853, 149; Fishes, pl. ii.—Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 205.

List of specimens.

Catal.| No. of Locality. | When Whence obtained. Nature of Collected by—
No. spec | collected. specimen.
250 1 Colorado river, Cal | 1854 Major Ешогу-------- Alcoholic.| Arthur Schott......-

2. GILA GRAHAMI, B. & G.
Prate XXIV, Fres. 7—12.
Spec. CHAR —Body sub-fusiform, compressed ; head entering about four times and a half in the total length. Posterior
extremity of maxillar bone extending to a vertical line drawn across the anterior rim of the orbit. Anterior margin of dorsal fin

somewhat nearer the insertion of the caudal than the extremity of the snout ; anterior margin of anal situated posteriorly to the
dorsal. Caudal strong and deeply furcated.

Syn.—Gila grahamii, В. &. С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 389.—Grp. in Proc. Acad. Nat. Sc. Philad.
УШ, 1856, 205.
The disposition and structure of the scales will be better understood by comparing the figure
of this species with those of the following one. The rays of the fins аге:
Ба, 10; A 2,105 СЮ 9,85; 510; Y 1,10; ЕМ.

The upper surface of the head and the dorsal region are reddish brown ; the upper half of the
flanks greyish brown, and the lower half greyish yellow. The abdomen is dull yellowish. A
metallic reflect prevailing all over the body. The fins being unicolor, of the tint of the see ю
which each of them belongs.
Plate XXIV, fig. 7, represents Gila grahami, somewhat reduced in size ; fig. 8 is the Заа
seen from beneath, showing the outline of the mouth ; fig. 9, the head seen from above ; fig. 10,
a scale from the dorsal region ; fig. 11, a scale from the lateral line ; and, ~ Lo a scale from
the abdominal region.

B

62 UNITED STATES AND MEXICAN BOUNDARY.

List of specimens.

|
Ca,al.| Cor. No. No.of} Age. Locality. When col-| Whence obtained. | Nature of Collected by—
No. | of teeth. | spec. lected. specimen. |
252 2801 6 |Ада!. Rio San Pedro, trib. of 185i Col. 7. D. Graham....| Alcoholic. Jno. Н. Clark....
| Rio Gila €
953 | 2802 | 1 |..4.. do 1851 ёй ds do
\ . Е

3. GILA EMORII, В. 4 с.
Prate X XXIII, Fres. 5—10.

Брес. Снак.—Воду elongated, compressed. Profile of head continuous with that of Ше body, and gradually tapering from
the паре to the snout. Head forming the fifth of the entire length. Mouth nearly terminal, though inferior still: the upper
jaw overlapping the lower one of the thickness of the lip ; the posterior extremity of the maxillar bone not extending as far as
the anterior rim of the orbit. Eyes circular, of medium size. Anterior margin of dorsal fin nearer the extremity of the snout
than the insertion of the caudal ; anterior margin of anal fin nearly opposite the posterior margin of the dorsal. Caudal fin
deeply furcated and slender. Тһе extremity ofthe ventrals not extending to the anterior edge of the anal. Тһе pectorals are
lanceolated, their extremity not reaching the insertion of the ventrals.

* Syn.— Gila emorii, В. & С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 388.--Ско. in Proc. Acad. Nat. Sc. Philad. VIII,

1856, 205.

The scales are small, elongated, sub-elliptical or sub-quadrangular, longer than deep, affecting
a curious arrangement (вее fig. 5). The lateral line undergoes a slight deflection along the middle
of the flanks.

Color uniform silvery, with a rather greyish tint along the upper regions.

Plate XXXIII, fig. 5, represents Gila emorii, size of life; fig. 6 is the head from beneath,
showing the outline of the mouth ; fig. 7, the head seen from above ; fig. 8, a dorsal scale; fig.
9, a scale from the lateral line; and, fig. 10, a scale from the abdominal region.

List of specimens.

Catal.| No. o Locality. When Whence obtained. | Nature of | Collected by—
No. | spec. collected. specimen.
247 1 Near the mouth of Gila river....| 1849 Major Emory...... Alcoholic. Dr. Jno. L. Leconte-..-

1. TIGOMA PULCHELLA, Grd.
Pirate XXXIV, Fres. 5—8.

Брес. Cuan.— The head is contained four times and a half in the total length. 'The mouth is small; the posterior extremity
of the maxillar bone not extending as far as {һе anterior rim of the orbit. Diameter of the eye entering five times and a half in
the length of the side of the head. "Тһе greatest depth of the body is contained about five times in the total length, of which
the caudal fin forms the sixth part. Two rudimentary rays at the anterior margin of the dorsal fin instead of one.

Srx.— Gila pulchella, B. & G. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 99
Tigoma pulchella, Gn». in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 206.
The scales are sub-elliptical, sometimes irregularly so, with radiating furrows upon their
posterior section alone; the lateral line being very much deflexed upon the middle of the flanks.
D2,9; А1,9; 04 1, 9,8, 1,8; V9; PIL

| ICHTHYOLOGY. 68

The color is greyish brown above and laterally ; dingy yellow beneath.
| Plate XXXIV, fig. 5, represents Tigoma pulchella, size of life; fig. 6 іва scale from the
dorsal region ; fig. 7, а scale from the lateral line ; fig. 8, a scale from the abdominal region

List оў specimens.

| | |
| Catal. | Cor. No. Мо. of Locality . | When со!- | Whence obtained. | Nature of | Collected by—

No. | of teeth. | spec. | * lected. | specimen. |
!
|

233 8181 | 2 | Rio Mimbres, tributary of Lake | 1851 Col. J. D. ووه‎ Alcoholic ..| John H. Clark ...

| Guzman, Mexico. | | | |

| | |

2. TIGOMA PURPUREA, Grd.

This is a much stouter fish than 7. pulchella, which it resembles in other respects ; but its
head is larger and its body shorter. The anterior margin of the dorsal is nearer the extremity
of the caudal than the tip of the snout, whilst in 7. pulchella it is nearer to the snout than the
extremity of the caudal. The scales are also larger than in Т. pulchella. The color is of
purplish black on the dorsal region and laterally ; beneath yellowish.

ورن -

Syn.—Tigoma purpurea, Gro. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 206.

List of specimens.

|
Catal.| Cor. No. |No.of| . Locality. Whencol-| Whence obtained. Nature of Collected by—
No. spec. lected. | specimen.
|
994 9718 15 | San Bernardino, Rio Huagui, 1854 Major Emory | Aleoholic.| Dr. C. В. Кеппегіу....
west ofthe Sierra Madre. |

3. TIGOMA INTERMEDIA, Grd.

Intermediate between T. pulchella and T. purpurea, more closely related, however, to the
| former than to the latter. Тһе fins are much less developed, the inferior fins especially are

quite small.

Svx.— Tigoma intermedia, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 206.

List of specimens.

Catal. Сот. No.|No. of Locality. When | Whence obtained. | Nature of | Collected by—

o. |of teeth.| spec. collected. | specimen.

232 | 9786 20 | Rio San Pedro, tributary of the Gila..

1851 | Col. 7. D. Graham. .| Alcoholic.| Жо. H. Clark..

64 UNITED STATES AND MEXICAN BOUNDARY,

4. TIGOMA GIBBOSA, Grd.
Prae XXXIII, Fras. 1—4.

Брес. Cnan.— Body rather thick ; dorsal region between dorsal fin and occiput more arched than generally observed in this
genus. Head forming a little less than the fourth of the entire length; greatest depth nearly equal to the length of head.
Eyes quite large ; their diameter contained five times in the length of the side of head. Anterior margin and dorsal fin nearer
the base of caudal than the tip of snout. Ventrals, as usual, in advance of the dorsal, and anal behind the latter. Greatest
length of caudal fin constituti g nearly the seventh of the entire length.

Зтм.— Gila gibbosa, В. & С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 28.
; Tigoma gibbosa, Ско. in Prec. Acad. Nat. Sc. Philad. VIII, 1856, 207.

Тһе scales, irregularly sub-elliptical, are longer than deep, and exhibit radiating furrows
upon their entire periphery.
АТ Cort, لول‎ 1,45 V9, PIT.
Color in alcohol, dark reddish brown above and laterally ; dull yellow beneath.
Plate XX XIII, fig. 1, represents Tigoma gibbosa, size of life; fig. 2 being a scale from the
dorsal region; fig. 3, a scale from the lateral line; and, fig. 4, а scale from the abdominal
region.

List of specimens.

Catal.|Cor. №. | No. of Locality.

| When Whence obtained. | Nature of Collected by—
Ко. |of teeth.| spec. collected.

specimen.

га

SI 2010 15 | Rio Santa Cruz, Мех ...........| 1851 Col. J. D. Graham. . | Alcoholic.| Jno. Н. Clark......
O S3 10 | Tascon, Sonora Lt. J. С. Parke do Dr. A. L. Heermann.

5. TIGOMA NIGRESCENS, Grd.
Prats ХХХІІ, Fres. 1—4.

This is quite an elegant species, being elongated and slender, like 7. pulchella and T. gracilis.
It differs from T. gibbosa by a more conical head and snout. Тһе ground color is yellowish,
the middle of the scales being covered with crowded black dots, the back and sides appearing
almost black. Тһе belly is unicolor. In the young the upper regions are lighter than in the
adult,

Syn.—Tigoma nigrescens, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 207.

Plate XXXII, fig. 1, represents Tigoma nigrescens, size of life; fig. 2, a dorsal scale; fig. 3,
a scale from the lateral line; fig. 4, a scale from the abdominal region.

List of specimens.
Catal. | Cor. №. | No. of | Locality. When col- | Whence obtained. | Nature of Collected by—
No. | of teeth. | spec. lected. specimen,
220 2774 10 | Boca Grande ------ ا‎ E AA 1854 Maj. Emory..-.. Alcoholic.| Dr. C. B. Kennerly---
دم‎ J... l | Janos river 1854 do do. do ke

ICHTHYOLOGY. 65

6. TIGOMA PULCHRA, Grd.
Рілте ХХХІІ, Fres. 5—8.

The body is gracefully elongated, in which respect it resembles T. nigrescens, from which it
may be distinguished by its smaller head and larger scales. The color, moreover, is of a far
more brilliant type: the dorsal region is reddish or blackish brown, the sides and belly, of a
uniform golden yellow ; a diffused black streak may occasionally be seen along the upper
portion of the flanks, very likely more predominant in the male than in the female.

Syn.—Tigoma pulchra, GRD. in Proc. Acad. Nat. Sc. Philad. ҮШІ, 1856, 207.

Plate ХХХІІ, fig. 5, represents Tigoma pulchra, size of life; fig. 6, a dorsal scale; fig. 7,
a scale from the lateralline; fig. 8, a scale from the abdominal region.

List оў specimens.

| |
Catal. | Сог. No. | Хо. of | Locality. When col- Wh btained.| Nature of | Collected by—
No. of teeth. spec. | lected. | specimens.
| | |
227 | 2181 3 | Chihuahua river and tributaries.-.| 1855 | John Potts, Esq..| Alcoholic.| John Potts, Esq. -
228 | 2782 4 | 40 40 | 1855 | 4о | do | 4о
| | | |

PTYCHOCHEILUS LUCIUS, Grd.
Pram XXXIV, Fies. 1—4.

A very characteristic species. Тһе body is compressed, but the head is flattened or depressed
and very much developed, constituting nearly the fourth of the entire length. Тһе dorsal and
ventrals are situated quite posteriorly. The scales are below the medium size, and the lateral
line is deflexed upon the abdomen: The pharyngeal bones are very slender; the inferior limb
is almost exiguous and proportionally as long as in P. grandis. There are, however, but four
teeth upon the main row, instead of five, as in the case of P. grandis. Color bluish grey
above ; silvery golden beneath.

Syn.—Ptychocheilus lucius, GRD. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 209.

Plate XXXIV, fig. 1, represents Ptychocheilus lucius, size of life ; fig. 2 is a scale from the
dorsal region ; fig. 3, a scale from the lateral line; fig. 4, a scale from the abdominal region.

List of specimens.
Catal. | Cor. No. | No. of Locality. When col-| Whence obtained. Nature of Collected by—
No. | of teeth. | spec. . specimen.
203 2757 1 | Rio Colorado, Cal.......- 1854 Major Emory. ..-.... Alcoholic | Arthur Schott. ------

9-і

66 UNITED STATES AND MEXICAN BOUNDARY.

Family CYPRINODONTIDAE.
CYPRINODON, Lacép.

The genus Cyprinodon is composed of small fishes, more or less sub-elliptical in their general
appearance, with no other differences between the sexes, except that in the female the body is
occasionally more elongated than in the male, and approaching to a sub-fusiform shape. Тһе
position and shape of the fins are nearly alike, the dorsal alone being somewhat higher in the
male than in the female, without, however, approaching to anything like that of Poecilia.
The caudal із sub-truncated upon its posterior margin. Тһе ventrals are small. The head is
rather well developed and anteriorly rounded off. Тһе teeth are elongated, broadest at the
crown, which is trilobed. Тһе gill apertures are continuous under the throat.

These fishes inhabit the brackish waters, and are especially numerous in the warm region of
the temperate zone. |

1. CYPRINODON ELEGANS, B. & G.
Prarg XXXVII, Fras. 1—7.

Spec. Cuan.— The general form differs according to the sexes; it being sub-fusiform in the female and sub-elliptical in the
male. Тһе head constitutes about the fourth of the total length. "The diameter of the eye enters about four times in the sides
of the head. "The dorsal fin is longer than high ; its anterior margin being equidistant between the extremity of the snout and
the азе of the caudal; its upper margin rounded off. The caudal, which forms about the seventh of the total length, is
posteriorly sub-truncated. Тһе origin of the ventrals is situated opposite the anterior margin of the dorsal fin.

Syn.— Cyprinodon elegans, В. & С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 389.

The dorsal region is deep bluish black, the sides of the body being variegated with bluish
black and olive. Тһе posterior edge of the caudal fin is black in the male. А black spot,
more conspicuous in the female than in the male, may be observed at the posterior margin of
the dorsal fin.

ӘЛІ; 410; 0:3 1,6: 8 154; V6; РЫ

Plate XXXVII, fig. 1, represents the female sex of Cyprinodon elegans, size of life. Fig. 2
is an outline from above. Fig. 3, a section across the region of greatest depth. Fig. 4, the
male sex of the same species, also size of life. Fig. 5, its teeth. Кіе. 6, an outline from
above. Fig. 7, a transverse section.

List of specimens.

Catal, | No. of| Sex. Locality. When Whence obtained. | Nature of Collected by—
No. | spec. collected. specimen,

686 | 21 d | Camanche Springs, Rio Grande 1851 Col. J. D. Graham...| Alcoholic.| John Н. Clark. .----
del Norte (Rio Bravo).
687 11 9 do 1851 do do do... -

__

|
|
|

ICHTHYOLOGY. 61

2. CYPRINODON GIBBOSUS, В. & С.
Prate XXXVIII, Fras. 1-+.

Брес. Снав.--Сепега! form sub-elliptical, the dorsal region arched in both sexes. The nape often depressed or sub-concave.
Тһе head is rather small, entering four times and a half in the total length. Тһе eye is large; its diameter is a little more than
the third of the side of the head. Тһе dorsal fin of the male is higher than long, that of the female somewhat longer than
high. The caudal is sub-truncated posteriorly, and enters about six times and a half in the total length. Тһе anal fin is less
deep and more rounded exteriorly than in C. elegans. Тһе origin of the ventrals is likewise placed somewhat more posteriorly
with reference to the anterior margin of the corsal. The pectorals are more elongated also than in the latter species.

Syn.—Cyprinodon gibbosus, B. & С. in Proc. Acad. Nat. Sc. Ри ад. VI, 1853, 390.

The dorsal region, the head, and dorsal fin are of a uniform bluish black in the male; the
ventral region is golden yellow. The caudal fin is posteriorly margined with black; the anal,
ventrals, and pectorals being yellow. The female exhibits vertical bars of black on the side of
the body. Тһе fins are unicolor, except the dorsal, which is provided Роканов with а black
patch.

D 10; A11 О Јово 1,8, 5; PAG.

Plate XXXVIII, fig. 1, represents the male sex of Cyprinodon gibbosus, size of life. Fig. 2
exhibits its teeth. Fig. 3, an outline from above. Fig. 4, a section of the body. Fig. 5 is
the female sex, also size of life. Fig. 6, an outline from above. Fig. 7, a section of the body.

List of specimens.

Catal. No. of | Sex. Locality. When Whence obtained. Nature of Collected by—

No. | spec. collected. specimen.

Indianola, Техав...... 1851 бо), J; D-Graham..... Alcoholic.| John Н. Clark .........
685 | 10 Q do 1851 do do do

с
со
=
M
[^]
о

3. CYPRINODON BOVINUS, В. « а.
Prae XXXVII, Fras. 12—18.

SPEC. Снав.--Сепета! form sub-elliptical ; dorsal region arched in both sexes. Head rather large, constituting the third of
the length, the caudal fin excluded. The eye is moderate sized ; its diameter entering four times in the length of the side of
` the head. Тһе anterior margin of the dorsal fin is equidistant between the extremity of the snout and the insertion of the
caudal Яп; it is higher than long in the male, and longer than high in the female. The caudal, which enters seven times in
the total length, is sub-truncated posteriorly. Тһе anal is shorter than in C. elegans, and inserted somewhat more poackwards.
The origin of the ventrals is placed opposite the anterior margin of the dorsal fin.

Syn.—Cyprinodon bovinus, B. & С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 389.

The male is uniform blackish brown above, olivaceous beneath; the fins being unicolor,
except the caudal, which has its posterior margin black. Тһе female has the lower portion of
the flank irregularly maculated ; the fins being unicolor also, except the dorsal, which exhibits
& black spot at its posterior margin.

ши 15; во, VO, E14

Plate XXXVII, fig. 12, артабан the male sex of C; ур авай bovinus, size of life. Fig. 13,
its teeth. Fig. 14, an outline from above. Fig. 15, a section of the body. Fig. 16, the female
sex of the same species, Fig. 17, a section of the body. Fig. 18, an outline from above.

68 UNITED STATES AND MEXICAN BOUNDARY,

List of specimens.

Catal. | No. оѓ | Sex. Locality. When Whence obtained. Nature of Collected by—
No. | spec. collected. specimen.
| |
682 10 d Leon's Spring, Texas- -| 1851 Col. J. D: Graham.....| | Alcoholic.| John H. Clark
683 6 Q 1 до | 1851 до до до

4. CYPRINODON MACULARIUS, В. & С.
Pratt XXXVII, Fras. 8—11.

Spec. Снав.--Тһе head constitutes one-fourth of the entire length. The eye is moderate ; its diameter entering four times
in the length of the side of the head. Тһе dorsal fin in the female is as long as high, its anterior margin being somewhat nearer
the insertion of the caudal than the extremity of the snout; its base enters six times in the total length. The caudal is poste-
riorly sub-convex, and is contained nearly six times and a half in the total length. "The anal is narrower, though deeper, than
the dorsal. Тһе ventrals being very small, and inserted somewhat anteriorly to the dorsal fin.

Syn.—Cyprinodon macularius, B. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 389.

The color above is reddish brown, yellowish beneath, maculated with black ; the spots on the
sides having a tendency to arrange themselves into vertical bands. Dorsal blackish ; the other
fins dull yellow, greyish at their base. |

Ст РІ.

Plate XXXVII, fig. 8, represents the female sex of Cyprinodon macularius, size of life. Fig.

9, its teeth. Fig. 10, an outline from above. Fig. 11, a section of the body.

List of specimens.

| | |
Catal. Хо, of | Sex. | Locality. | When Whence obtained. Nature of| Collected by—
No. | врес. | | collected specimen:
| | | | |
992 | 8 | Q | Rio San Pedro (Rio qu: ЕЕ 1851 | Col. J. D. Graham Alcoholic | Jno. Н. Clark. `-
|

HYDRARGYRA SIMILIS, В. & 6.
Рште XXXV, Fros. 1—8.

Брес. Сндв.— Воду elongated and sub-fusiform. Head sub-conical in profile, constituting somewhat more than the fourth
ofthe total length. Diameter of the eye entering five times in the side of the head. Dorsal fin higher than long, its base being
contained about nine times in the total length. The caudal fin, posteriorly sub-truncated, constitutes about the seventh of the
total length. Anal narrow ўмя deep, its central rays, іп the male, more elongated than in the female. Ventrals rather small.

Pectorals of moderat t. Scales about as deep as long, anteriorly sub-concave, posteriorly convex, with a few radia-
ting furrows upon their ан section alone.

Бүм.--Нубғатдуға similis, B. & С. in Proc, Acad. Nat. Sc. Philad VI, 1853, 389.
The back is bluish grey, the sides and abdomen yellowish. Transverse black bars in both
sexes. Fins unicolor in the female; the dorsal fin of the male exhibiting a black Spot. at its
posterior margin.

0 11; А8; 03,1,8, 7, 1,2; У 5; P 18.

ICHTHYOLOGY. | 69

Plate XXXV, fig. 1, represents Hydrargyra similis, size of life. Fig. 2, an outline from
above. Fig. З, а dorsal scale. Еіс. 4, an abdominal scale. Fig. 5, із Ше male sex of the
same species, also size of life. Fig. 6, an outline from above. Fig. Т, a dorsal scale. Fig. 8,
a scale from the abdominal region.

List of specimens.

Catal. | No of | Age & Sex. Locality. When Whence obtained. | Nature of | Collected by—
No. spec. collected. specimen.
651 | 12 |Adult d & Q | Indianola, Texas. ....... 1851 Col. J. D. Graham....| Alcoholic.| Ло. Н. Clark...
|

FUNDULUS GRANDIS, B. & G.
Piate XXXVI.

Брес. Cuar.—The body is rather plump, its greatest thickness being somewhat more in the male and somewhat less in the
female than the fourth of the total length, in which the head enters about four times. Scales on the occiput and opercular
apparatus very large. Diameter of the eye entering about five times in the side of the head. Caudal posteriorly rounded. Anal
inserted under the posterior portion of the base of the dorsal, the tips of the rays of both these fins being nearly even: they are
more elongated in the male than in the female.

Syn.—Fundulus grandis, В. & б. in Proc. Acad. Nat. Sc. Philad. УІ, 1853, 389.

The dorsal region is bluish black ; the sides greyish, with yellow spots. Beneath dull yellow.
Dorsal and caudal fins in the male deep metallic black, yellow spotted, external margin yellow;
other fins yellowish ; base of anal also spotted. Body and fins in the female unicolor,

17 11 А во ЛЕ ظ ۹ واو ولوا‎ ву бы

Plate XXXVI, fig. 1, represents the female sex of Fundulus grandis, size of life. Fig. 2,an
outline from above. Fig. 3, a dorsal scale. Fig. 4, an abdominal scale. Fig. 5 is the male
sex of the same species, also size of life. Fig. 6, an outline from above. Fig. 7, а dorsal scale.
Fig. 8, an abdominal scale.

List of specimens.

Catal. | No. of | Sex and age. Locality. When | Whence obtained. Nature of | Collected by—
No. spec. collected. | | specimen.
| | 3
650 5 Adult 280 Indianola, Texas....... | 1851 | Col. J. D. Graham.... Alcoholic.| Jno. Н Clark...

POECILIA, Schn.

‘It having been ascertained that Mollinesia is the female sex of Poecilia, the species hitherto
described under these two heads must necessarily come under that of Poecilia alone, which has
priority. Much is yet left undone as to the natural history of these fishes.

The genus Poecilia is closely related to Limia of Poey, from which it differs by a more back-
ward position of the anal and ventral fins as compared to the dorsal. The latter, in the male
sex, acquiring likewise a development which it never reaches in Limia. The anal fin, moreover,
has the same structure in both sexes, and which is not the case іп Јата.

10 UNITED STATES AND MEXICAN BOUNDARY.

POECILIA LINEOLATA, Grd.
Рілте XXXV, Fries. 9—11.

SPEC. Снав.--Неай rather small and acute, entering four times and а half in the total length. The diameter of the eye
is contained about four times in the side of the head : once in advance of the anterior rim of the orbit. Dorsal fin in the female
longer than high, its anterior margin nearer the extremity of the snout than the insertion of the caudal, and its base equal to the
length of the head. Тһе caudal, which is posteriorly rounded off, enters four times and a half in the total length. Тһе anal is
small, inserted opposite the posterior third of the base of the dorsal. Тһе insertion of the small ventrals takes place in advance
of the anterior margin of the dorsal Яп. The scales are much deeper than long.

The color is olivaceous or reddish brown, with seven longitudinal series of black spots occu-
pying the centre of the scales. Dorsal and anal fins with transverse black filets ; other fins
unicolor. |
D14; Ат; С5,1,8, 8, 1,4; У 6; P 12.

Plate XXXV, fig. 9, represents the female sex of Poecilia lineolata, size of life. Fig. 10, а
dorsal scale. Fig. 11, a scale from the abdominal region.

List of specimens.

Catal. | No. of | Sex and Locality. When Whence obtained. | Nature of Collected by—
No. spec. Age. collected. specimen.
667 3 |QAdult | Brownsville, Texas.....| 1853 Capt. Van Vliet....... Alcoholic. | Capt. Van Vliet.....
668 4 Ф Fort Brown, Texas...... | 1853 Major Emory.........]... do ....| Jno. Н. Clark......

LIMIA, Poey.

The external row of acerated and incurved teeth, and the narrow band of velvet-like ones
which may be observed upon the jaws, are characters common to Poecilia as well as to Limia.
The caudal fin is likewise rounded off posteriorly in both the genera just alluded to. But
whilst the male sex of Poecilia differs from its female by an extraordinary development of the
dorsal fin, the male sex of Limia is distinguishable from its female by a narrower and much
more elongated ага] fin. The ventral fins, in Limia, are inserted in advance of the anterior
margin of the dorsal, whilst the anal remains in a more backward position, with its posterior
margin projecting beyond that of the dorsal fin.

1. LIMIA POECILOIDES, Grd.
Рілте XXXVIII, Fras. 8—14.

Брес. Cuan.—Body very much compressed, rather deep upon its middle ; the head constituting about the fourth of the total
length, the proportions varying somewhat, according to the sexes. Тһе teeth of the external row are very slender and exiguous.
The dorsal fin is larger in the male than in the-female; its anterior margin is nearer the extremity of the snout than the
posterior edge of the eaudal, which is convex. Тһе anal fin, in the female, is larger than the dorsal, and inserted posteriorly
to the latter ; whilst in the male the same is situated opposite the middle region of the dorsal. The ventrals are very small in
both sexes, and inserted in advance of the anterior margin of the dorsal. 'The pectorals are rather short and broad.

The color is reddish brown, apparently uniform in the female, whilst the male exhibits
transverse fascia of a darker hue, and a small blackish spot at the base of each scale,

ICHTHYOLOGY. 71

constituting about seven longitudinal series on either side of the body. The dorsal fin is
likewise transversely black spotted.
D:13 A 65048, 1, hs 151,2; У 5; Р13. (Маје)
8; 12; ; до; do. (Female.)

Plate XXXVIII, fig. 8, represents ГЕ: Жы sex of Limia poeciloides, size of life. Fig. 9,
an enlarged front view of the mouth, showing the teeth. Fig. 10, an outline from above.
Fig. 11, ideal transverse section across the greatest depth and width. Fig. 12, female sex of
the same species, size of life. Fig. 13, an outline from above. Fig. 14, a transverse section.

List of specimens.

Catal. No. of | Sex. Locality. When со]- | Whence obtained. | Nature of Collected by—
No. | spec. lected. specimen.
670 2 149 | Indianola, Texas 1851 Col. J. D. Graham...| Alcoholic.) John Н. Clark.......

2. LIMIA VENUSTA, Grd.
Prate XXXIX, Frias. 20—23.

Spec. Снав.--Тһе body is gracefully fusiform, elongated, and compressed ; the head forming somewhat less than the fourth
of the total length. The teeth of the external row are slender and acute, a good deal larger than in the preceding species,
and the snout is thicker and less depressed. The dorsal fin is larger than the anal, and situated more in advance than in the
species just alluded to, the same sexes being compared. The shape and position of the other fins do not differ materially in
both species, except the pectorals, which are more slender in the present one. The posterior margin of the caudal fin is, as
usual, rounded off.

The color is reddish brown, apparently uniform, although traces of black spots or dots seem
to have existed at the base of the scales ; but the epidermis being partly removed from the
specimens гара іп alcohol, the living ones may exhibit distinct spots.

Р 13; АП; 68; 1,8, В, 1, 2; V5; Е 10. (Female)

Plate XXXIX, fig. 20, represents the female sex of Limia venusta, size of life. Fig. 21 is
а front view of the mouth, considerably enlarged in order to show the teeth. Fig. 22, an
outline from above. Fig. 23, an ideal section across the line of greatest depth and width.

List of specimens.
аж i
Catal. | No.of Sex. °` Locality. When col-| Whence obtained. | Nature of Colleeted by—
No. | spec. | lected. | specimen.
кеў Breed
669 1 | Q | Indianola, Texas............ | 1851 | Col. J. D. Graham....| Alcoholic -| John H. Clark.......

1. GAMBUSIA NOBILIS, Grd.
Prat XXXIX, Fres. 8—11.

Spec. Cuar.—Body rather short and stoutish ; head large, forming about the fourth of the total length. Anterior margin
of dorsal fin situated midway between the extremity of the snout and the posterior margin of the caudal. Anal much smaller
than the dorsal; both being comparatively broad and exteriorly rounded. Ventral fins very small ; pectorals moderate sized
and rather short. |

Syn,—Heterandria nobilis, B. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 390.

(2 UNITED STATES AND MEXICAN BOUNDARY.

Тһе ground color is dark reddish brown above; lighter beneath: the edge of the scales
being margined with black.
ПРВА ТУ ОЧЕ 1,51: 3; Y 6; Р10. (Кети)
Plate XXXIX, ће. 8, represents the female sex of Gambusia nobilis, size of life. Fig. 9, а
front view of its mouth to show the dentition. Fig. 10, outline from above. Fig. 11, an
ideal section across the line of greatest depth and width

List of specimens.

Catal. | No. of Locality. Whencol-| Whence obtained. | Nature of Collected by—
No. | spec lected. | specimen.
679 6 | Leon’s Spring, Texas 1851 Col. J. D. Graham .... Alcoholic .| John Н. Clark.......
680 | 1 | Camanche Spring, Техав........... 1851 4о „== до до
681 | 2 Zoquito, Texas 1851 do ханд i do

2. GAMBUSIA AFFINIS, Grd.

Рілте XXXIX, Fres. 12—15.
і -
Spec. Снав.--Воду elongated, sub-fusiform, and slender. Head rather small, constituting the fifth of the entire length.
The dorsal fin is narrow, its anterior margin somewhat nearer the extremity of the snout than the margin of the caudal fin.
Anal like the dorsal in size and shape. Ventrals slender and elongated ; pectorals moderate sized and elongated
Syn.—Heterandria affinis, В. & С. in Proc. Acad. Nat, Sc. Philad. VI, 1853, 0

Color yellowish brown above; orange beneath. Fins unicolor, except the dorsal, which
exhibits narrow dark cross bands. Тһе caudal is occasionally maculated with black
25: АВ; 0911, 6,1, 2; УБ: Р treme)
Plate XXXIX, fig. 12, represents the female sex of Gambusia affinis, size of life. Fig. 13,
а front view of its mouth, exhibiting the dentition. Fig. 14, an outline from above. Fig. 15,
an ideal section across the line of greatest depth and width

List of specimens.

Catal. | No. of Locality. When со!- | Whence obtained. Nature of Collected by—
No. | spec. lected. | specimen.

677 | 3 |Rio Medina, Texas 1861 د‎ D. Graham......| Alooholic..{ John Й. Clark ...-...
678 | 1 | Rio Salado, Техаг........... Е до „фә do 4

3. GAMBUSIA PATRUELIS, Grd.
PEATE XXXIX, Fras. 1—7.

Брес. Снлв.— Body elongated, sub-fusiform, compressed. Head constituting the fifth of the entire length, although larger
than in б. affinis. The dorsal fin is somewhat smaller than the anal, and its anterior margin nearer the posterior edge of the
caudal than the extremity of the snout. Тһе origin of the anal is placed further in advance of the dorsal than in any of the
species of the genus figured on the accompanying дэ The ventrals are rather small, whilst the pectorals are broad and
considerably more developed than in the other species.

Syn.—Heterandria patruelis, B. & С. in Proc. Асай. Nat. Sc. Philad. VI, 1853, 390.

ICHTHYOLOGY. 73

The color is dark reddish brown above; yellowish beneath, with an oblique dark streak

across the cheek beneath the orbit. The caudal fin is occasionally barred.
DATO e V6; Р ІІ. (Female.)
По.; т; - ibus do. (Ма1е.)

Plate XXXIX, fig. 1, жилээ T S: sex of Gambusia patruelis, size of life. Fig. 2,
an outline from above. Fig. З, an ideal section of the body. Fig. 4, the male sex of the
same species, size of life. Fig. 5, an enlarged view of its mouth, showing its dentition. Fig.
6, an outline from above. Fig. 7, a cross section of its body.

List of specimens.

Catal. | No. of Locality. | When eol-| Whence obtained. Nature of Collected by—

No. | spec. | lect - specimen. |

6/2 | 12 | Rio Babinal, Texas. هددد‎ | 1851 Col. J.D. Graham....| Alcoholic -| Jobn.H. Olark.........
673 4 Rio Leona, Texas | 1851 | 4 LIO nus qon RERO Sap qus
674 6 | Rio Nueces, Техав.............. | 1851 | do grew: ccs do

675 3 Elm creek, Гехав | 1851 | 40 | 40 do

676 | 1 Turkey creek, Texas | 1851 | 40 | 40 40

|
GIRARDINUS OCCIDENTALIS, Grd.
Pram XXXIX, 1106. 16—19. ;

Spec. Снак.—Воду slender and elongated, dorsal region sub-convex. Head rather small and conical, tituting somewhat

more than the fifth of the entire length. Тһе dorsalfin is small and narrow ; its anterior margin being a little nearer the
extremity of the snout than the posterior edge of the caudal fin. ‘The anal resembles the dorsal in size and shape. The ventral
fins are very small and short, and the pectorals rather broad and moderate sized.

SxN.—Heterandria occidentalis, В. & С. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 390.

The color above is reddish brown ; beneath reddish yellow. A black streak may be observed
along the ventral line and under the peduncle of the tail. The fins being unicolor, of a light
yellowish tint.

D6; АТ; C4,1,7,6,1,3; V6; P 10, (Female.)

Plate XXXIX, fig. 16, represents the female sex of Girardinus occidentalis, size of life.
Fig. 17, a front view of its mouth, magnified, showing the teeth. Fig. 18, an outline from
above. Fig. 19, a cross section of the body.

List of specimens.

Catal. | No. of Locality. When со!- Whence obtained. Nature of Collected by—
No. | spec. lected. specimen.
671 5 | Rio Santa Cruz, Мехісо........) 1851 Col. 7. D. Graham ..... Alcoholic -| John Н. Clark .....----

Family CHARACINIDAE.

The body is scaly, and the majority of the fishes of this family have, in addition to the dorsal
fin, an adipose finlet. The upper arcade of the mouth is formed anteriorly by the permaxillars,
10 i

14 UNITED STATES AND MEXICAN BOUNDARY.

and sideways by the maxillar bones. Тһе dentition varies greatly according to the genera ; the
teeth may even be wanting. Тһе pharyngeal bones do not exhibit those large teeth which we
have observed amongst Cyprinoids. Тһе air-bladder is divided into an anterior and a posterior
partition, as is the case in the Cyprinoids, and there is, in addition, а connecting chain of small
bones between the same air-bladder and the organ of audition such as may be observed in both
Cyprinoid and Siluroid families. Тһе pseudobranchia are not visibly developed, an organie
trait by which these fishes may easily be distinguished from the Salmonidae. Іп such as are
provided with an adipose finlet, an oviduct leads the eggs out, not allowing them to fall
into the abdominal cavity. Тһе intestine is provided with numerous ceca.

ASTYANAX, B. & G.

GEN. Снав.- Воду compressed ; abdomen not serrated. Scales large. Adipose fin present. А double row of teeth on the
premaxillaries and anterior portion of the maxillaries. Neither canine nor palatine teeth. Gill apertures continuous under
the throat; branchiostegal rays three on either side. Pharyngeal teeth absent, else so minute as not to be perceptible. Dorsal
fin situated above the ventrals.

Зум. — Изуитах, В. & G. in Proc. Acad. Nat. Sc. Philad. УП, 1854, 26. °

The premaxillar teeth have the same structure as those on the lower jaw: Plate VIII, fig. 6,
giving a very good idea of what that structure is. Тһе teeth observed at the upper portion of
the anterior edge of the maxillar bones are very small, simple, conical, imperceptible to the
naked eye.

The species described below, the only one so far known of its genus, is the northernmost
representative of the family Characinidae, which is thus added to the fauna of the United States of
North America.

ASTYANAX ARGENTATUS, В. Ф С.
Puate VIII, Fras. 5—9.

SPEC. Снак.—Воду rather short, deep, and very much compressed, the head forming about the fifth of the total length. The
snout is abbreviated and rounded off; the mouth of medium size, its angles not extending so far back as a vertical line drawn in
advance of the pupil. The eye is large and circular; its diameter entering about three times and a half in the length of the
side of the head. Opercular apparatus quite narrow. Dorsal fin higher than long, somewhat concave upon its upper margin ;
its anterior edge being placed midway between the extremity of the snout and the insertion of the caudal fin. Adipose fin
quite slender, situated opposite the posterior portion of the anal. Caudal fin deeply furcated and longer than the head. Anal ба
longer than deep, exteriorly concave, much deeper anteriorly than posteriorly, and inserted backwards ef the dorsal. Тһе
ventrals, rather slender, are inserted nearly under the middle of the dorsal. The pectorals, larger than the ventrals, are
also slender ; their tips, however, do not reach the insertion of the ventrals when stretched in that direction.

бүх.—Лзїуатах argentatus, В. & С. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 27.

The scales are deeper than long, somewhat truncated anteriorly. "There are no radiating
furrows, but some very well marked stria may be observed upon their posterior section. "The
lateral line is very conspicuous, and slightly bent downwards upon the middle of the abdomen.

Br. III: 111; D1,10; А1, 21; (5, 1,9, 8, 1,4; V 8; P 13. |

The dorsal region is of а deep reddish brown, whilst the sides of the abdomen are of a bright
silvery hue; the fins being reddish yellow. An elongated black spot exists at the base of the
caudal fin, extending along the central rays to near the posterior edge of that fin.

Plate УШТ, fig. 5, represents Astyanax argentatus, size of life. Fig. 6 is an enlarged view
of the open mouth, in order to show the peculiar shape of the teeth, some of which being

ICHTHYOLOGY. 15

represented isolated іп а, b, c, and d. Fig. 7 is a scale from the dorsal region. Fig. 8, a scale
from the lateral line; and, fig. 9, a scale from the abdominal region.

List of specimens.

3
Catal. Хо. Хо. of spec. Age. Locality. When Whence obtained. | Nature of
collected. | Specimen.
|
869 24 Adt.& y'g.| Rio Nueces, Texas 1851 Col. J. D; Granani. г... | Alcoholic. .
870 | مه‎ ы Rio Leona, Texas 1851 do do
871 vo) soe ава Zoquito, Texas 1851 do | йо
872 LO ЕЗЕРА: Camanche Springs, Texas 1851 do |. cil EE ET
873 р мамам Elm creek, Texas 1851 do | do
j 874 4 и. катани эн Turkey creek, Texas 1851 do | 4о
875 San Felipe, Texas 1851 do 12:40
876 pr ee Devil's river, Texas 1851 do gir Же
8TT 36 luz ers Brownsville, Texas 1852 Captain Van Vliet ....... Дат
878 ll E E Mouth of Rio Grande (Rio Bravo). 1853 Major Emory шабы сы
879 £ .. Ееее Rio Sabinal, Texas 1854 do do

= зай

Family SCOPELIDAE.
One specimen of Saurus MEXICANUS was collected by Gustavus Würdemann, along the coast
of Texas. It is the only species, so far known, representing this family in the Gulf of Mexico.
Family CLUPEIDAE.

Five species of this family have been gathered at various places along the Gulf of Mexico.
Amongst them аге two Engraulis (anchovies), one Meletta, one Chatoessus, and one Clupeonia.
They are chiefly due to the exertions of Captain Van Vliet, John H. Clark, under Major Emory,

and Gustavus Würdemann.

Family MURAENIDAE.

These are eel-like fishes, characterized by the absence of ventral fins, and sometimes also by
the want of the pectorals themselves. Тһе air-bladder has a communication with the throat
through an air-duct, as is the case іп the sub-order of Malacoterygii abdominales. Pseudobranchia
do not exist in this family. Тһе pyloric appendages are wanting. Ав far as anatomic obser-
vations have been traced upon representatives of this family, there seems to be no ovi-
duct: the eggs falling in the abdominal cavity, whence expelled through a postanal aperture.

ANGUILLA TYRANNUS, Grd.
PLATE XL.

Spec. Cuan.---Head quite depressed ; anterior third of body sub-cylindrical, somewhat deeper than wide, -- проп `
the rest of its length. The cephalic region measured from the extremity of the lower jaw to the insertion of the pectoral fins,
enters about seven times and a half in the total length. The lower jaw is longer than the upper ; the gape of the mouth is
nearly horizontal ; is angle, corresponding to a vertical line drawn inwardly of the — rim of the orbit. The eye is well
developed and sub-circular ; its diameter entering twice upon the distance bet rim and the tip of the lower jaw.

E

(6 UNITED STATES AND MEXICAN BOUNDARY.

The posterior nostril is large and placed near the eye; the anterior nostril, on the other hand,
is very small, situated near the apex of the snout, and exteriorly of which may be seen a short
membranous expansion just in advance of the upper lip. The teeth are small, conical, disposed
upon a narrow longitudinal band on both jaws and along the vomer also; wider anteriorly than
posteriorly where it tapers away. The branchial apertures are small, vertical, situated in advance
of the insertion of the pectoral fins. The origin of the dorsal fin corresponds to the anterior third
of the total length ; the origin of the anal fin is placed somewhat anteriorly to the middle of the
entirelength. The scales are narrow, elongated, and cellular in structure; and, although imbedded
in the skin, they are quite apparent to the naked eye. They are disposed upon small group with
their longitudinal diameter in every possible directions, giving the surface of the animal a check-
ered aspect. They extend over the base of the fins. The upper region is dark olive green; the
inferior region being dull yellow or light olive. The periphery of the caudal fin is black.

Plate XL, fig. 1, represents Anguilla tyrannus, reduced from a specimen over two feet long.
Fig. 2 is a scale from the dorsal region ; fig. 3, a scale from the abdominal region.

List of specimens.

Catal. | No. of Sex and Locality. When eol- Whence obtained. Nature of
No. | spec. | age. lected. specimen.
|
857 1 Adult. | Mouth of Rio Grande del Norte (В. Bravo)..| 1853 Major Emory Alcoholie..
858 4 |... .....|] Matumoras, OOO ы | s 2 5 Lieutenant D. N. Couch......|.... до ==
59 5 Young | до 40 40

NEOMURAENA, Girard,

Gen. Cuan.—Neither pectoral nor ventral fins ; dorsal and anal fins low, uniting into a point posteriorly. Anterior maxillar
teeth largest. Опе series of vomerine teeth. Gill apertures lateral and sub-circular.

NEOMURAENA NIGROMARGINATA, Grd.
Prams XLI.

Spec. Cuar.—Head rather slender and sub-conical ; body compressed and tapering into a point. The mouth is deeply cleft,
the jaws being equal, its gape nearly horizontal, and its angle extending considerably beyond the orbit. The maxillar teeth are
slender and acute, canine-like, larger anteriorly than posteriorly ; a series of short sub-conical ones may be observed upon the
middle of the vomer. The eyes are sub-elliptical and of moderate development.

The posterior nostrils, which are also the largest, are situated above the orbits on a line
drawn in advance of the pupil ; the anterior nostrils being tubular, situated near the apex of
ihe snout and directed forwards. Small mucous pores may be observed on the upper surface as
well as on the sides of the head. Тһе dorsal fin commences anterior to the branchial apertures,
which are sub-circular and rather small. The vent is placed anterior to the middle of the total
length, where the anal fin is reduced to a mere membranous ridge. The scales are so minute
and imperceptible that the body appears as though perfectly smooth. The lateral line is like-
wise inconspicuous,

The ground color is reddish brown, darker above than below, with whitish dots scattered all
over the body and fins; the dorsal fin is black, margined with a series of black spots; the anal
being entirely black or purplish black.

ICHTHYOLOGY. 17

Plate XLI represents Neomuraena nigromarginata, size of life. The outlines beneath the
main figure are transverse sections of the body and tail.

List of specimens.

Catal. | No. of Locality. When Whence obtained. Nature of Collected by—
No. | spec. collected. specimen.
860 1 St. Joseph’s island, Texas... 1853 Gust. Wiirdemann Alcoholic.| Gust. Würdemann.....

NEOCONGER, Girard.

Gen. Cuar.—Pectoral fins present ; dorsal and anal fins mostly reduced to a membranous ridge, uniting with the caudal, where
they are better developed. Snout tapering ; lower jaw shorter than the upper; maxillar teeth exiguous, disposed upon multiple
series. А patch of similar teeth оп the front of the vomer, and one series along its median line. Gill apertures lateral, rather

large and vertical.

NEOCONGER MUCRONATUS, Grd.

Брес Онан.--Тһе largest specimens observed are about twelve inches in total length. The head is small, slender, narrow,
and pointed ; the upper jaw projecting beyond the lower. Тһе таре of the mouth is horizontal, its angles extending beyond
the orbits. Тһе eyes are very small, sub-elliptical.

Тһе posterior nasal aperture is placed near the anterior rim of the orbit, whilst the anterior
one is situated on the side and near the apex of the rostrum. Тһе vent is situated somewhat
nearer the extremity of the snout than the posterior edge of the caudal fin. The dorsal fin
commences a little way in advance of the vent, and, like the anal fin, it constitutes a mere
membranous ridge until about an inch and a half from the posterior extremity of the body, where
it expands, fin-like, and unites with the anal. Тһе pectorals are small, sub-elliptical in their
outline, and broad at their base.

The color is dark reddish brown above; light reddish or dull white beneath.

List of specimens.

Catal. | No. of Locality. When Whence obtained. Nature of Collected by—
No. spec. collected. specimen.
861 5 St. Joseph’s island, Texas... 1853 Gust. Wiirdemann...... | Aleoholic.| Gust. Wiirdemann.....

LIST OF THE PLATES. Ч

Prep 1. Dioplites nuecensis, Grd.—p. 3.
Рілте П.----Гівв. 1—4.— Pomotis heros, В. & G.—p. 6.
Fras. 5—8.—Pomotis fallax, В. & G.—p. 8.
Ріате ПТ.—-Етоз. 1—4.— Pomotis aquilensis, s. nefastus, В. б G.—p. 7.
Fras. 5—8.—Pomotis aquilensis, В. & G.—p. 7.
Fics. 9—12.—Pomotis fallax, в. convexifrons, В. & G.—p. 8. Ч
Рілте IV.——F':as. 1--4.--СаШагив longulus, Grd.—p. 5.
Fras. 5—8.—Pomotis speciosus, D. & G.—p. 5.
Fries. 9—12.—Herichthys cyanoguttatus, В. & G.—p. 30.
Fries. 1—5.—Umbrina phalaena, Grd.—p. 13.
Fies. 6—10.—Amblodon neglectus, Grd.—p. 12.
Рілте VI.—-Otolithus drummondii, Richards. —p. 12.
Рілте УП.— Micropogon undulatus, Cuv. & Val.—p. 13.
Prate VIIT.-—Fros. 1—4.—Johnius ocelatus, Grd.—p. 14. |
Етаз. 5—9.—Astyanax argentatus, D. & G.—p. 74. |
Fies. 10—13.—Pileoma carbonaria, В. & G.— р. 10.
Fries. 14—17.—Poecilichthys lepidus, Grd.—p. 11.
PrarE 1X.—-Fies. 1- 4.- Orthopristis duplex, Grd.—p. 15.
Fries. 5—8.—Neomaenis emarginatus, Grd.—p. 18.
Fras. 9—12.—Eucinostomus argenteus, В. & G.—p.17.
Figs. 13—16.—Lagodon rhomboides, Holbr.—p. 16.
PrATE X.——-Fres. 1—4.—Mugil berlandieri, Grd.—p. 20.
Fies. 5—9.—Polynemus octonemus, Grd.—p. 19.
Pra XI.—-Fics. 1—3.—Carangus esculentus, Grd.—p. 23. |
Fie. 4.—Doliodon carolinus, Grd.—p. 22. | 1

PLATE V.

Fie. 5.—Chorinemus lanceolatus, Grd.—-p. 21.

Fie. 6.—Chloroscombrus caribbaeus, Grd.—p. 21. |

Fie. 7.—Argyreiosus capillaris, ПеКау.--р. 23. |

Ета. 8.—Vomer setapinnis, Grd.—p. 24. |
Prate ХП.- Еіаз. 1—3.— Eleotris sumnulentus, Grd.—p. 28.

Етөз. 4 & 5.- бов lyricus, Grd.—p. 25. 1

Ета. 6.—Blennius multifilis, Grd.—p. 27. 4

Fies. 7 & 8.—Gobionellus hastatus, Grd.—p. 25.

Fries. 9 & 10.—Gobius catulus, Grd.—p. 26.

Fries. 11 & 12.—Eleotris gyrinus, Cuv. & Val.—p. 28.

Fie. 13.—Philipnus dormitator, Cuv. تا‎ Val.—p. 29.

Ета. 14.—Gobiosoma molestum, Grd.—p. 27. | |

LIST OF PLATES,

Prate XIII.—— -—Belone scrutator, Grd.—p. 30.

Prate XIV.———-Ailurichthys marinus, В. & G.—p. 31.
PLATE XV.———— Arius equestris, В. & G.—p. 32.
PLATE X VI.—— Pimelodus affinis, B. & G.—p. 32.

Ртлте XVIT.———Pimelodus affinis, В. & G.—p. 32.
Рглтк ХУПТ.——Рипејодив vulpes, Grd.—p. 33.

Prate XIX.———-Fros.
Figs.

Fas.

PLAPE ХХ. —— —Fros.
Firas.

Fras.

Prate XXI.——-Ftros.
Fras.

Prate XXI.. Fros.
FIGs.

PrATE XXIII.—- Eras.
Fias.

Prats XXIV.——Fros.
Figs.

Pram XX V.—F as.
Fras.

Fres.
PEATE XX VI.—-—Fros.
Fras.

Figs.

Fras.

Fras.

Fres.

- Ріате XX VII.— Е168.
Fires.

Fras.

Fres.

Fras.

Ртлте X X VIII.—Figs.
Figs.

Tas.

Firas.

Prats XXIX.—-Ftas.
Fras.

Fres.

Егвв.

Fras.

1—4.—Ictiobus tumidus, Grd.—p. 34.
5—8.—Ptychostomus albidus, Grd.—p. 36. *
9—12.—Luxilus leptosomus, Grd.—p. 60.
1—3.—Moxostoma victoriae, Grd.—p. 35.
4—6.—Moxostoma campbelli, Grd.—p. 35.
1--9.--Моховіота kennerlii, Grd.—p. 34.
1—4.—Minomus insignis, Grd.—p. 37.

5—8.—Ptychostomus congestus, Grd.—p. 36.

1—4.—Minomus plebeius, Grd.—p. 38.
5—8.—Minomus clarki, Grd.—p. 38.
1—5.—Catostomus bernardini, Grd.—p, 40.
6—10.—Acomus guzmaniensis, Grd.—p. 39.
1—6.—Acomus latipinnis, Grd.—p. 39.
7—12.—Gila grahami, В. & G.—p. 61.
1—4,—Campostoma ornatum, Grd.—p. 41.

5—8.—Campostoma formosulum, Grd.—p. 41.

9—12.—Campostoma nasutum, Grd.—p. 42.
1—4.—Dionda couchi, Grd.—p. 44.

5—8 —Dionda argentosa, Grd.—p. 43.
9—12.—Dionda serena, Grd.—p. 42.
13—16.—Dionda chrysitis, Grd.—p. 43.
17—20.—Dionda melanops, Grd.—p. 44.
21—24. — Пюпда texensis, Grd.—p. 42.
1—4.—Algansea tincella, Grd.—p. 46.
5—8.—Argyreus notabilis, Grd.—p. 47.
9—12.—Argyreus osculus, Grd.—p. 47.
13—16,.—Algoma fluviatilis, Grd.—p. 45.
17—20.—Algoma amara, Grd.—p. 45. |
1—4.—Agosia metallica, Grd.—p. 49.
5—8.—Agosia chrysogaster, Grd.—p. 48.
9 4 10.—Meda fulgida, Grd.—p. 50.
11—14.—Tiaroga cobitis, Grd.—p. 60.
1—4,—Alburnellus megalops, Grd.—p. 52.
5—9.—Gobio gelidus, Grd.—p. 49.
10—13.—Alburnellus amabilis, Grd.—p. 51.
14—17.—Alburnellus socius, Grd.—p. 52.
18—21.—Codoma vittata, Grd.—p. 53.

80

LIST OF PLATES,

Prate XIX.— —-Fras. 22—25.—Codoma ornata, Grd.—p. 53.

Prate XX X.-—— Fres. 1—4.—Moniana rutila, Grd.—p. 57.
Fres. 5—8.—Moniana formosa, Grd.—p. 58.
Fres. 9—12.—Moniana gibbosa, Grd.—p. 59.
Fres. 13—-16.—Moniana aurata, Grd.—p. 56.
Fras. 11—20. —Мошапа frigida, Grd.—p. 56.
Frias. 21—24.— Мопіапа couchi, Grd.—p. 57.

Рілте XX XI.—--Fies. 1--4.-- Cyprinella venusta, Grd.—p. 54.
Fres. 5—8.—Cyprinella macrostoma, Grd.—p. 54.
Fries. 9—12.—Cyprinella texana, Grd.—p. 55.
Fries. 13--16.- СургіпеПа luxiloides, Grd.—p. 55.
Fres. 17—20.—Moniana complanata, Grd.—p. 56.
Fras. 21—24.—Cliola velox, Grd.—p. 51.

PLATE XXXII.—-Fies. 1—4.—Tigoma nigrescens, Grd.—p. 64.
Fies. 5—8.—Tigoma pulchra, Grd.—p. 65.

Prate XXXITI.—Fias. 1—4.—Tigoma gibbosa, Grd.—p. 64.
Fras. 5—10.—Gila emorii, Grd.—p. 62.

Prate XXXIV.—Fies, 1—4.—Ptychocheilus lucius, Grd.—p. 65.
Fies. 5—8.—Tigoma pulchella, Grd.—p. 62.

Prate XX XV.—-Fros. 1—8.—Hydrargyra similis, В. & G.—p. 68.
Fres. 9—11.—Poecilia lineolata, Grd.—p. 70.
Fries. 12—17.—Cochlognathus ornatus, В. & G.—p. 46.

Prate XXX VI.—Fundulus grandis, В. & G.—p. 69.

Ртлте XX XVII.-Fras. 1—7.—Cyprinodon elegans, В. & G.—p. 66.
Fras. 8—11.—Cyprinodon macularius, В. & G.—p. 68.
Fias. 12—18.—Cyprinodon bovinus, B. & G.—p. 67.

Pirate ХХХУПТ.-Е1вз. 1—7.—Cyprinodon gibbosus, В. & G.—p. 67.
Fras. 8—14.—Limia poeciloides, Grd. —p. 70.

Pirate XX XIX.— Fros. 1—7.—Gambusia patruelis, Grd.—p. 72.
Ев. 8—11.—Gambusia nobilis, Grd.—p. 71.
1168. 12—15.—Gambusia affinis, Grd.—p. 72.
Fras. 16—19.— Girardinus occidentalis, Grd.—p. 73.
Fres. 20—23.—Limia venusta, Grd.-—p. ТІ.

Pra XL. Anguilla tyrannus, Grd.—p. 75.

Ртлте XLI.—-Neomuraena nigromarginata, Grd.—p. 77.

p" 7

һә» WA ng а улла z сик аа

ALPHABETICAL INDEX.

(Synonyms are in italics.) Р
Page, Page.
А; Atherinidae 19
سه‎ зә | Atherinopsis <:
د‎ atipinnis е Mt а
sestivalis, Gobio 49
affinis, Gambusia 72 ; В.
affinis, Heterandria 72 bacalaus, Gobionellus 24
affinis, Pimelodus 32 | маш, Gobius 94
Agosia 48 аа Carangus = 23
"s ehrysogaster 48 bartholomaei, НЫ ырак вара цыйна مو وون‎ 93
* metallica 49 Batrachidae 11
Ailurichthys Ces 1ه‎ at: us tau 11
D blochii ; 3l | Belone scrutator 30
3 mene 7! | berlandieri, Mugil 20
У атопоуй............................... | | bernardini, Catostomus 40
“ arinus ود دغه‎ eas ا‎ 31 Нрашайа = а ре а ووه‎ 97
albidus, Ptychostomus 36 | Blennius, multifilis swe М
Alburnellus amabilis 51 blochii, Ailurichthys 31
“ - megalops 5% ٢ Galeichthys وه‎
~ і 52 16080128 76 -. 11
коа дийн 51 хө буран. 27
2 megal Ops 52 Bothrolaemus .. 22
w зосшв 92 | bovinus, Cyprinodo: Е А رس‎ CAE
alepidotum, Gobiosoma ?7 | brasiliensis, Gobionellus - 00M
alepidotus, Gobius 27 iensis, Gobius 24
Algansea tincella UE 46 й, Vomer --. 24
goma 44 | Bryttus longulus wee 5
“ amara 45 "
* fluviatilis е 45 С.
amabilis, Alburnellus 5
amabilis, Alburnus 51 Calli | гд :
amara, Algoma 45 “ 4 10
Amblodon concinnus 13 camp belli, (oim Ps
grunniens 19 | Campostoms...... s-s- دمه‎ = gy rr m
“ Задна 2 13 | ~ formosulum ...........--.-----------.- 4
е neglectus. я 19. м nasutum e 42
іа — 75 27 ornatum .....- поето .................... 41
anillanis, болойн 11 | capillaris, Argyreiosus .........................-... 93
aquilensis, Pomotis...... 7 | capillaris, Zeus 1 4 =
argentatus, Astvanax 74 Carangus bartholomaei ... йт 5
“ет п | “ муше... B
argentosa, Dionda 43 “ ' defensor ,-------.... арени зя
rgyreiosus сарШагі 93 “ esculentus : 205
Argyrens notabilis 47 ^ faleatus =
osculus AT гд . 5 à
Arius equestris 32 ні pisquetus abies cous aas soi sleet с а на
styanax 74 7 richardi % |
ve. رد‎ 5 5 07755 о وم | ی‎ ішіне Саша n M

سوه

82

ALPHABETICAL INDEX.

D. bartholomaet

carangus
“ chrysos
о ЧЕ а
* falcatus
“ fallax Q
* | pisqueus 2245
“ richardi dels
тан сана
earibbae Zo
earolina, цан Бу: E сырық»
carolinus, Doliodon...... ......
8 tumidus
— € bernardini
clarkii
ын congestus ا‎
“ guzmaniensis pd
“ insignis
i latipinnis
“ plebeius

catulus, Gobius

ntropomus undecimalis

-...-...

Characinidae
Chatoessus

Chloroscombrus
5 caribbaeus

Chorinemus

“ lanceolatus

ehrysitis, Dionda

cobitis, Tiaroga

٨ ornatus

Codoma

М ornata

“ vittata

coerulescens, Pimelodus

complanata, Moniana s

сопешпиз, Amblodon

tus, Ptychostomus

Conodon antillanus

convenyfron, Pomotia

eyano-guttatus, Herichthys

Cyprinella Inxiloides

“ maerostoma

“

* 7 venusta

бурам oorr مه‎

Page.

БЕБЕРБЕЗЕЕО

Cvprinodon
JP

“ bovinus

-ү............... вэ... === += е

e-- ^" a» << <<< <<< с ви... ст == +

defensor, Carangus
defensor, Caranx

Dionda argentosa.... .
“ у sitis

ehrv&ati

* — eouchi

.-........

===. ===> ===

٤ melanops
ЭР

Dioplites fasciatus

+ nobilis .....

“ nuecensis

« salmoides

Doliodon

...--«------ ووو واو و

“ carolinus

“ spinosus

dormitator, Philipnus
drummondi, Otolithus

duplex, Orthopristis

Echeneidae

Echeneis

elegans, Cyprinodon

elegans. Gila
gans,

Eleotris sumnulentus
аў gyrinus

emarginatus, Neomaeni

emarginatus, Lobotes

Engraulis

equestris, Arius

esculentus, Carangus

Etheostomidae
Eucinostomus

“

eydouxi Ailurichthys
, J

argenteus `

eydouxii, Galeichthys ............

ка Algoma

rmosa, Moniana

батын CARN аа са مور‎ ВЕ

ма

ёс»

frigida, Moniana

ALPHABETICAL INDEX.

fulgida, Meda.......

Fundulus grandis...

тея blochii ...
eydo

ouxii .

x: gronovit .

marinus .

ағае

----т-----.-..-......»--...... ......-

1 Р
Gambusia affinis

patruelis .

Яах Gobio

=<... поети ..................

Gerres

Ярова, Gila

grahami
ёо pulchella e oe au

Girardinus occidentalis

Gobida

-----

Gobio aestivalis

“

8
е brasiliensis .

= hastatus

ка lanceolatus

geli
Gobionellus ........
“

«-.....

* E алын 252222222

Gobiosoma

ы alepidotum

ч molestum

Gobius alepidotus. . . . _

эж د اې يې يې ې یي‎ ээжээ” шата тата мамаша

..........

sasons маша د ې‎ .......... ........

grandis, Fundulus

gronovii, Ailurichthys............... PE а арты AD D 5

gronovii, Galeichthys

grunniens, Amblodon
(t + FJ هس‎

Ч ЗОНЫ. مه‎

ne пивсепаз

gulosus, Gobius

Page.

ПН linca alid

guzmaniensis, Ácomus Persi
guzmaniensis, Catostomus ...............-.

gyrinus, Eleotris
or з

H
Haemulon -
hastatus, Gobionellus
Herichthys
5 cyano-guttatus
Heros
heros, Pomotis 4

MUN affinis
nobili 8

“ occidentalis

v patruelis.
Homoprion lanceolatus

xanthurus

Hydrargyra similis

Ictiobus tumidus
imberbis, Sciaena
insignis, Catostomus
insignis, Minomus

intermedia, Tigoma

t

Johnius осеПайів
josephi, Ophidion TI

kennerlii, Moxostoma

Labridae

Lagodon rhomboides
lanceolatus, Chorinemus ...--..---.-....----..---..
lanceolatus, Gobionellus

lanceol. 148 Gobius
lanceolatus, Ношортіоп.........-..--....-..-..--..
latipionis, Acomus 4

еовоша......--..-.-------«----»--------.
өрді. РоесШісінһув....2.......-.................
leptosomus, Luxilus

lepturus, Trichiurus ge
Lichia carolina....-- Я
1 1 ү 1 1
най. г.
ги atom И та RE E

Poecilia Ee. i‏ ا
Lobotes emarginatus ....... Е Ша‏
longulus, Calliurus . s са‏

longulus, Bryttus, Ротойів................-.-..-----

--—---

дэ Ptychochei lu

223 хоо

oe ....

Бега сан іп

84

Раде,
М.

macrostoms, Cyprinella .......-----------------<-- 54
arius, Cyprinodon 68
уо уе Nos is cedo E E иас Бах انعم‎ scours 17
тн МИНИ... e ee e cuan enn I auo Mm 31
farmi Galetebilys. с o бае іца 31
Meda 50
“ fulgida 50
Megalops, Albürhollik еее. 52
megalops, alburnus-.s 59
melanops, Dionda 44
melanops, Calliurus 10
Mots с 75
metallica, Agosia 49
mexicanus, Saurus 75
Micropogon инт сеооа ماو مه ووا‎ ase ее 13, 14
inomus 37
+ insignis 37
5572) plebe د د‎ 38
“ elarki 38
molestum, Gobiosoma 97
Mollinesia 69
Moniana aurata 56
2 complanata 56
hs 0013028 оса соса 57
" ЮҮШОЁВ С 222222... 58
* — frigida 56
e gibbosa 59
“ gracilis 59
“ pmitida 58
“оо рговегрша 22522... %.. vous 59
v GIS аи: 57
— campbelli 35
ennerlii 3: 34
5 1186-22-24: газыб 35
109001038030 Моовол от, wines موو‎ 55554255 77
Mugil berlandieri 90
Mugilidae ас, 19
multifilis, Blennius ы о?
NNNM EA AEE еа е зы ае من‎ 75

N. 4
nasutum, Campostoma ............ о; 49
nefastus, Масан дысы ыр a a 7
neglectus, Amblodon 19
Neocon 77
л ucronatus....... is 77
Neomaenis 18
ын ЗОХИЖ ыы а а “18
Neomuraena. | as 76
“ nigro ы 76
nigrescens, ТОША е. №
D MIR, Neomuraena SD
nitida, Monia Us EM U
nobilis, еріне 2 3
nobilis, Gambusia ооо
nobilis, 0990668 ыы. да у 3
nobilis, Jie 71

ALPHABETICAL INDEX.

notabilis, Argyreus

а
по ив, Otolithus

nuecensis, свн

uecensis, Gryste

obliquus, Leiostomus

кезде түсе Girardinus
occidentalis, Heterandria

وو وور ее.‏

ocellata, ند و‎ Регса
ocellatus, Johnius

octonemus, Polynemus
Ophididae

Ophidion josephi

“-. edm

ornata, Codoma

ornatum, Campostoma

Ға!

ornatus,

о

Orth opri istis

“ duplex
а

osculus, Argyreus

Otolithus drummondi ...........

" nothus

ovis, Sargus
3 з

рагае, Galeichthys

eigen ndi kiotärolsemus

#8
Perca undulata

* ocellata

phalaena, Umbrina

Philipnus dormitator

Pileoma carbonaria
ТЕ y UAM | ٢ >

“ coerulescens

[11

vulpes
pisquetus, Carangus
pisquetus, Caranx .

Poecilichthys lepidus

pooellodos, асаре P وودد‎ 0522-202 23 1254

Pomotis aquilensis
e 7

жр fallax
я heros
3 lon. ииз
“ n efastus
8 speciosus
Polynemidae н
А —

ALPHABETICAL INDEX.

Pristipoma

proserpina, Мопіяпа..

Ptychocheilus lucius

Ptychostomus congestus /.
“ M

МАН cro
purpurea, Tigoma.

R.

rhomboides, Lagodon...... ны
ides, Sparus, Sargus

rutila, Moniana ...

==“... "e

salmoides, Dioplites

Sciaena imberbis....... сс ил
5

pelinidae .
scrutator, Belone ...__
serena, Dionda ........
setapinnis, Уотег...............

29 ава свете Cues ээ sove

MUNG, 2608 наа а аа aped
urid

Sil Вега denas du i VR UR ووس د‎ dis

Silurus marinus ....

similis, Hydrargyra ..............
smaragdus, Gobionellus...... .... .... vds uus Seek da 5

из, Gobius....
socius, Alburnellus
socius, alburnus ............... سو‎ es өө CURA Vua ld
Әр Lau naL ағзасы o Bud
speciosus, Pomotis

spinosus, Doliodon ...............

--..

Page.

59
65

4.

Tastee 2 2 leq

tau, Batrachu

texana, Cyprinella ...... өзект

Tigoma gibbosa....... ......
" intermedia .... ...

“ риг

“ pulchra =
purea . .

tincella, Alganséa ................. дае

lincella, Leuciscus ....... каў

Trachinotus pampanus. „= s

Trichiurus lepturus............
tumidus, Carpiodes

tumidus, Ictiobus . ......

tyrannus, Anguilla ..

TImhri hal

"n

undecimalis, Centropomus
undulata, Perca

undulatu 8, Micropogon

velox, Cliola

venusta, Cyprinella

venusta, Limia

viridi-pallidus, Gobius

vittata. Codoma

vulpes, Pimelodus

wurdemanni, Gobius

xanthurus. Ноторгіоп
‚+ 1

Тола rom
T

“ seapinnis.

13, 14

CONTENTS.

FAMILY PERCIDAE

ГЛОРШТЕВ NUECENSIS

CALLIURUS LONGULUS
1 т
9. Ромоті5 HEROS

3. Ромотів AQUILENSIS
4 D
FAMILY ETHEOSTOMIDAE

PILEOMA CARBONARIA

Рокспаснтнү8 LEPIDUS

FAMILY BATRACHIDAE

FAMILY SCIAENIDAE

OTOLITHUS DRUMMONDI

AMBLODON NEGLECTUS

UMBRINA PHALAENA

MICROPOGON UNDULATUS

loHWNIUS OCELLATTS

ORTHOPRISTIS

Ға”

FAMILY SPARIDAE

LAGODON RHOMROIDES
FAMILY MAENIDAE

EUCINOSTOMUS

EUCINOSTOMUS ARGENTEUS ووو د ووو موم ده‎
NEOMAENIS
NEOMAENIS EMARGINATUS

FAMILY POLYNEMIDAE

Рогухюмга остохтағ

FAMILY ATHERINIDAE

FAMILY MUGILIDAE

Мост, BERLANDIERI

FAMILY SCOMBRIDAE seess.

Сновткемоз

8

г

Га!

Рошморох

ПРошорох CAROLINUS

CARANGUS

CARANGUS ESCULENTUS
А

VoOMER SETAPINNIS

FAMILY TAENIOIDAE

FAMILY GoBIDAE

GoBIONELLUS

ГА!

1. Совшв LYRICUS
9 Ға!

95001108 05101008, ео پوه دوه‎
4 Ға!

Goni080MA

СовговомА МОЬБКВТОМ.......өөөөөгөөөөсөөөөөө
FaMiLY BLENNIDAE

BLENNIUS MULTIFILIS

9. E

тэ.

FAMILY PLEURONECTIDAE

FAMILY ECHENEIDAE
FAMILY ОРИФШАЕ

FAMILY SCOMBERESOCIDAE .

т»

FAMILY LABRIDAE

HERICHTHYS

FAMILY SrLURIDAE

AILURIGHTHYS

ARIUS EQUESTRIS

1. PIMELODUS AFFINIS,.......................

9 P ЖА
FAMILY CYPRINIDAE

ICTIOBUS TUMIDUS
1. MOXOSTOMA KENNERLII.,...................
9, MOXOSTOMA VICTORIAE .
3. МоховтомА CAMPBELLI .

LP NGESTUS Қа

2. PTYCHOSTOMUS ALBIDUS. 0 ssc. ند‎

Мтхомтз ....

هوو هوه وو РРА‏ و و و و ډوو د دای E Міхомсз ІКЕІСХІЕ,,‏

9. MINOMUS PLEBEIUS , .......
3. MINOMUS CLARKI ..

9, Acomus GUZMANIENSIS

gssssscssbHSBUESENSSNEEEEETE

5989992427559 اغ څ ۵ څ‎ š 2 ë Š

п

CONTENTS.

FAMILY CvprnINIDAE— Continued,

CAMPOSTOMA

1. CAMPOSTOMA ORNATUM

9. CAMPOSTOMA FORMOSULUM

3. CAMPOSTOMA NASUTUM

1. Di0NDA SERENA

9. 11089 ۸ 58

3; DO ABOENTONA, осо even doce сово
4. DIONDA CHRYSITIS

5. DIONDA MELANOPS

6. DroNDA COUCHI

ALGOMA

1. ALGOMA AMARA

2. ALGOMA FLUVIATILIS

Га?

CocHLOGNATHUS ORNATUS

1. AnaYnEUS

9. ARGYREUS NOTABILIS

AGOSIA

1. AGOSIA СНВҮ5ОСАВТЕВ....»»»...»..4...2...

9. AGOSIA METALLICA

Совто AESTIVALIS
Мера

Мера FULGIDA

Слога VELOX аса

1. ALBURNELLUS AMAS UO
9. А à
د د‎

..

Сопома
1. СоромА ORNATA
9. Сорома VITTATA

3. СТРИИ ТЕКЛИК. осоне ссе обоа
4. CYPRINELLA LUXILOIDES.

1. MoNIANA AURATA

9. MONWILNA COMPLAXATA, саво ёе is осе rostis
3. MONIANA FRIGIDA
4. МОИХ COUGH с со оста хаан vb vv e Oy oe
5. MONIANA RUTILA
6.. MONIANA NITIDA
7. MONTANA ковмозл........................
8. МОН ваб... е аў а
9. MONTANA GIBBOSA.

à 10. Montani Нада... مهود‎ с соса осе Бе хь

š

555 Е58558ЕҮЄ ЕЕББЄЕЄЕЕЕ855555155858521:Е46888855

FAMILY Cyprinipar—Continued.

AA

FAMILY CYPRINODONTIDAE.

LUXILUS LEPTOSOMUS

TIAROGA

TIAROGA COBITIS

„ 1. GILA ELEGANS

- 9. GILA GRAHAMI

3. Gina EMORII

1. TIGOMA PULCHELLA
LE CORRAL са ماما موو هووا‎ a

8: TIGOMA INTERMEDIA eee .... o... .........

4. ТіаомА GIBBOSA

5. Тісома NIGRESCENS

6. TIGOMA PULCHRA

D,

CYPRINODON

“1. CvPRINODON ELEGANS..
` 9. CYPRINODON GIBBOSUS
3. CYPRINODON 8
4. C /
HYDRARGYRA БІМІШЕ.........................

FUNDULUS GRANDIS бо с осе сөөг өг өө өсөдвөгө
` POECILIA

POECILIA LINEOLATA

LIMIA

` 1. LIMIA POECILOIDES

9. LIMIA VENUSTA

1 С.Хлгрттат А wanta
.

9. GAMBUSIA AFFINIS

3. QCawrreta РАТРТТЕТ ТО

Arini‏ هه “Die‏ یپ

FAMILY CHARACINIDAE

ASTYANAX.. 2

` ASTYANAX ARGENTATUS

Бампт ЧсорРРТЛПАР.
Кампу CLUPEIDAE. eed ae oc

Famity MURAENIDAE š $
` ANGUILLA TYRANNUS 5
INNEOMURAENA.

` NEOMURAENA NIGRO-MARGINATA ...............

NEOCONGER

NEOCONGER MUCRONATUS. осо о во ово ово вох

.

List оғ Pr

” T * “ Р
ALPHARETICAL INDEX
“алан Р

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! Wu: ры
يغه‎ = Да
! E ^.
e med meg Сы بي‎ ки
ее a ٩ . Ё »
\ М со 4

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UNITED STATES & MEXICAN BOUNDARY

туы CON. eye

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FISHES

UNITED STATES & MEXICAN BOUNDARY

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