RROCKEDINQS OK WASHINGTON ACADEMY OF SCIENCES VOL. V, PP. 189-229. [PLATES n-xx.] SEPTEMBER 12, 1903, PAPERS FROM THE HOPKINS STANFORD GALA- PAGOS EXPEDITION, 1898-1899. XV. NEW FISHES. BY EDMUND HELLER AND ROBERT EVANS SNODGRASS. INTRODUCTION. THE twenty-three new species here recorded are described from the material obtained by the authors in 1898 and 1899 at the Galapagos Archipelago, Cocos Island and in the neighbor- ing waters. The proportional measurements given are percen- tages of the length to the end of the vertebrae, except where otherwise stated. The writers are indebted to Dr. David Starr Jordan and to Dr. Charles Henry Gilbert, of Stanford Univer- sity, for suggestions and assistance while working on the collection. Evolantia, gen. nov. Characters. — Pectorals about one third of total length; ventrals very short, outer lobe three and three fourths in head, a little less than four in pectoral, inner lobe two in head, insertion midway between posterior border of opercle and base of caudal ; anal fin but little shorter than dorsal. A single species known, E. micropterus (Cuvier & Valenciennes) . According to the disposition by Jordan & Evermann l of the flying fishes with the ventrals inserted behind the middle of the body into \Fishes N. & M. A., HI, Addenda, pp. 2835, 2836. Proc. Wash. Acad. Sci., Sept., 1903. (189) HELLER AND SNODGRASS two genera, Exonautes and Cypsilurus, each with large ventrals, this species must be placed by itself in a third genus, for it differs from Exonatites and Cypsilurus, as thus defined, in having short ventrals and pectorals, but agrees with Exonautes in the length of the anal. It is probably allied to Exonautes rather than to Exoccetus, which has small ventrals, on account of the posterior position of these fins, the ventrals being anterior in Exoccetus. Evolantia, hence, repre- sents an Exonautes with unspecialized ventrals and with but slightly elongated pectorals. Specimens were secured in latitude 4° N., longitude 90° W. SPHYR^ENA IDIASTES sp. nov. pi. ii. Type. — Cat. No. 12331, Leland Stanford Jr. University Museum. Seymour Island. Diagnosis. — Differs from 61. argentea, its closest American ally, in the posterior insertion of the ventrals, the greater length of the head, the wider interval between the maxillary and eye and in the possession of smaller scales. It is apparently most closely related to S. heller 7*1 of the Hawaiian Islands from which species it differs in the scale formulae, in the greater number of vertical rows of scales on the opercle, in the extension of the scaled area beyond the posterior border of the eye and in the longer pectorals. Description of the Type. — Length 480 mm.; head 3; depth 8; eye 7; D. V, 10; A. 10 ; scales 20-145-12. General shape fusiform, dorsal and ventral outlines symmetrical ; head slender, acutely conical. Maxillary not reaching anterior border of orbit, separated by a space a little greater than diameter of eye ; suborbital one half of head ; posterior angle of opercle obtuse ; exserted portion of mandible slightly greater in length than one half diameter of eye. Scales on suborbital, extending forward to below center of pupil ; top of head, sides of snout and a crescent-shaped area behind and below eye naked. Front of each jaw toothless ; a series of small, flat, triangular teeth along sides of both jaws; those on mandible larger and fewer. Internal horizontal plate of each premaxillary with three large, flat, elongate teeth inclined backward ; in line with each of these series are a series of six similar, large, palatine teeth directed downward and in- ward followed by a long series of minute teeth. Anterior portion of mandible with two large, triangular teeth directed backward. ^Sphyrcena helleri Jenkins, Bull. U. S. Fish Comm., p. 387, 1899. PROG. WASH. ACAD. SCI. VOL. V PLATE GQ NEW FISHES First dorsal spine longest, four in head ; posterior spines decreas- ing regularly in length to last which is equal to diameter of eye ; spines depressible in a groove. Second ray of soft dorsal longest, exceeding slightly the first ray, three and one third in length of head ; posterior rays decreasing regularly in length to ninth which is three and one half in length of first; last ray longer, two and one half in first. Caudal fin deeply forked, lobes equal. Pectorals small, about three in head, slightly exceeding the ventrals, upper rays longest. Anal similar to soft dorsal in shape but lower, first ray three and three fourths in head. A young specimen, 50 mm. long — presumably belonging to this species — taken from the surf near Tagus Cove, Albemarle, has a series of eight wide black median dorsal spots. The first is the largest and is situated on the head posterior to the eyes, the second is fused in the median line with the third, and the last is situated on the base of the caudal peduncle. On each side is a black longitudinal line, best marked posteriorly. At the base of the anal is a large brown spot and there is a similar spot on the middle of the caudal peduncle, while at the base of the caudal fin is a smaller one. The snout and tip of the lower jaw are dusky. The rest of the body is pale. Another specimen, 40 mm. long, has the same characters except that the second dorsal spot is narrower and not fused with the third. A third specimen 97 mm. long has a faint indication of this color pattern, there being a fairly well marked granular lateral stripe and obscure traces of the dorsal spots. MEASUREMENTS OF Sp/iyrcena idiastes. Catalogue No. Iceland Stanford Jr. University Museum. (Type). "331- 12321. 480 4Q7 Head IT, 77 Depth .. . I? 12 Pectoral II IO Ventral IO 6 6 Kye • Head .. id. 14 Maxillary: Head 7.2 l6 Exsertion of mandible \ Head 38 8 41 4.O Interorbital : Head 1C 16 7 7 Dorsal Spines v v IO IO IO IO I4"> 14-1 Scales, transverse ... 20-12 18-12 192 HELLER AND SNODGRASS APOGON ATRADORSATUS sp. nov. pi. in. Type. — Cat. No. 6357, Leland Stanford Jr. University Museum. Charles Island. Diagnosis. — Almost identical with Apogon atricaudus of the Revillagigedo Archipelago, differing from it in having the distal half of the second dorsal black. We have examined numerous specimens of Apogon atricaudus in the Stanford University collection and not one of them shows any trace of black on the second dorsal. Our specimens, preserved in the same manner as the others, invariably have the black on this fin. If the Revillagigedo specimens had in life any black on the second dorsal fin it has, in all cases, faded from it, but not from the first dorsal nor from the caudal. In many Galapagos specimens the tail appears to be a little more deeply forked than in the Revillagigedo specimens, but it is not constantly so. Description of the Type. — Head two and two thirds ; depth three ; eye three; D. VI-I, 9; A. II, 8 ; scales minutely ctenoid, 3-25-11. Maxillary reaching a little back of posterior margin of pupil ; pectorals reaching base of anal ; ventrals reaching posterior margin of anus. Snout blunt ; profile of head straight, gently inclined from snout to front of dorsal, slightly concave from this point to front of second dorsal, descending then to base of caudal peduncle, where it forms an abrupt angle with the peduncle ; ventral profile with about same con- vexity as dorsal, but outline from front of anal to base of caudal fin evenly and roundly concave. Second dorsal higher than first; first dorsal spine short (variable in length, in largest specimens about equal to interorbital space, in younger ones shorter) ; second and third spines longest, two and one half in head ; succeeding spines rapidly shorter, so that posterior border of fin is receding ; seventh spine at- tached to second dorsal, as long as second and third ; second and third soft rays of dorsal longest, one half longer than last spine ; posterior rays very short so that dorsal margin of fin posteriorly turns downward and forward; soft anal similar to soft dorsal; tail emarginate (the depth of emargination greater in young specimens). Coloration in Alcohol. — Brownish, darker above, minutely punctate with black specks ; caudal and first dorsal dusky, second dorsal and anal pale basally, dusky terminally. In life the color was bright red, paler below, with the distal parts of the vertical fins black. PROC. WASH. ACAD. SCI. VOL. V PLATE fi 1 e a o g" PROG. WASH. ACAD. SCI. VOL. V PLATE IV NEW FISHES The collection contains a large number of specimens of this species from Cocos Island, and from Seymour, Chatham, Narboro, Albe- marle (Tagus Cove) Tower, James, Hood, Duncan, Barrington and Charles Islands of the Galapagos Archipelago. Galeagra gen. nov. Characters. — Head similar in shape to that of Apogon but the body somewhat more elongate. Subopercle, interopercle and opercle with their angles armed with more or less prominent spines ; preoper- cle with a double edge, the posterior edge serrated. Scales large, ctenoid, thirty three in the lateral line ; lateral line little curved, inter- rupted ; pectoral greatly elongate ; dorsal fins two, the spines VIII-I ; anal spines III ; soft parts of both dorsal and anal short ; teeth small, present in both jaws, and in a V-shaped patch on the vomer; gills four, with a slit behind the last ; gill-rakers long ; branchiostegals six. Affinities somewhat doubtful. The single specimen on which the genus is based is evidently a deep-sea form. GALEAGRA PAMMELAS sp. nov. pi. iv. Type. — Cat. No. 6355, Leland Stanford Jr. University Museum. Wenman Island. Diagnosis. — Subopercle armed with a large spine at the angle ; in- teropercle with a smaller spine ; opercle with several small spines at angle and with a deep notch above angle ; preopercle with a double edge, the anterior short, the posterior serrated ; scales large, 2-33-7, serrated; lateral line not following outline of back, broken. D. VIII— I, 10 ; A. Ill, 7 ; maxillary short, extending to the vertical from middle of pupil ; pectorals produced. Description of the Type. — Head two and seven ninths in length ; depth three and five sixths; eye two and two sevenths in head, maxil- lary two and two ninths ; interorbital four and one ninth. D. VIII— I, 10 ; A. Ill, 7 ; scales 2-33-7, pores 33. Body little elevated, vertical profile elliptical, with the greatest depth at front of dorsal fin ; body more or less compressed ; head flat above the oblique profile ; snout obtusely pointed, equaling the inter- orbital width in length; mouth rather small, oblique, with equal jaws; maxillary short, extending to vertical from middle of pupil, lower edge smooth ; both jaws armed with a single series of small teeth ; a V-shaped patch of eight or nine slightly enlarged teeth on vomer; palatines apparently toothless ; head spiny, with small pre- and post- 194 HELLER AND SNODGRASS ocular spines on the supraocular margin ; preopercle with a double edge, the anterior short and soon obsolete dorsally, the posterior rounded at angle, and armed with slender serrations on angle and on posterior edge ; subopercle with a stout spine at angle, bifid at tip, upper spine longest, slightly more than one half the interorbital width in length ; interopercle with a smaller, stouter spine at angle ; opercle smooth along lower edge, the angle armed with about twelve small spines, the one at the angle considerably enlarged, a deep rounded notch above angle with two small spines above it. Gills four, a slit behind last; pseudo-branchiae well developed. Gill-rakers long, more than one third of eye in length ; fourteen below the angle. Brachio- stegal rays six. Scales large, thirty-three in lateral line, armed with moderately long, slender serrations ; head scaled on cheeks and on occiput to between orbits ; entire body scaled, leaving only fin membranes naked. Lateral line begins above opercle and extends in a slight curve to between the dorsals, then goes obliquely downwards for a short distance, and then horizontally to caudal peduncle; broken between dorsals by a slight interval. (Some of the posterior scales of the lateral line are missing.) Dorsal fins two, separated in front of last dorsal spine by an interval equal to diameter of eye. Spinous part high, rounded ; third spine highest, slightly greater than one half the length of head ; first spine very short ; posterior spines slender. Soft dorsal joined to last dorsal spine, outline of the fin lunate, posterior rays somewhat produced and filamentous, about equaling anterior ones in length. Anal fin begin- ning behind origin of soft dorsal, spinous part much lower than spinous dorsal ; first spine very short, second longest but evidently shorter than third, which is stouter but broken at tip. Soft anal similar to soft dorsal, but scarcely lunate. Pectoral fin long and ribbon-shaped, rays filamentous at tip, reaching beyond posterior border of anal fin ; rays thirteen. Ventrals pointed, spine nearly equaling the filaments, rays I, 5. The caudal fin is missing, only a few of the basal rays remain on the ventral side. Coloration in Life. — Black with metallic-green iridescence ; snout and lower jaw somewhat paler ; fins dusky. NEW FISHES 195 MEASUREMENTS OF THE TYPE OF Galeagra -pammelas. c8 Head ~\6 Depth 26 Eye..., 13 Interorbital width . . . 8 Maxillary Height of spinous dorsal; • 18 Height of spinous anal • ii Height of soft dorsal , 12 Height of soft anal • 12 Pectoral 42 Ventral 17 Deoth of caudal peduncle..., 12 CORVULA EURYMESOPS sp. nov. Type. — Cat. No. 6361, Leland Stanford Jr. University Museum. Charles Island. Diagnosis. — Closely allied to Corvula macrops Steindachner, from Mazatlan and Panama. It differs most conspicuously from this species in being much more slender ; in having a greater number of dorsal spines — thirteen instead of twelve ; in having the tip of the lower jaw slightly included (in C. macrops it reaches as far forward as the tip of the snout) ; in having the interorbital space wider ; and in hav- ing a longer maxillary. Description of the Type. — Body slender and elongate, snout blunt, lower jaw included ; profile from tip of snout to nape about straight (very slightly concave), slightly rounded from here to front of spinous dorsal, straight and horizontal to front of soft dorsal, evenly descend- ing from here to caudal peduncle. Ventral profile about same as dorsal, straight and horizontal from ventrals to anal. Mouth oblique, at an angle of 45°. Maxillary a little greater than one half of head, about equal to second anal spine. Eye four in head. Anterior nostril oval, the posterior the larger. Angle of preopercle rounded, ascending limb inclined somewhat forward, space between its upper end and eye a little less than eye. Fifteen gill-rakers on ceratobranchial, upper ones long and slender, decreasing gradually to the lowest. Teeth all small, in a single series in lower jaw ; in upper jaw a band of small teeth, the outer ones enlarged. Fourth and fifth dorsal spines longest, about two and one half in head ; first very small, almost rudimentary ; second a little longer than half the length of the third; third only a little shorter than the fourth ; sixth to tenth rapidly decreasing in size so that tip of tenth projects 196 HELLER AND SNODGRASS but little back of tip of fifth in elevated fin ; in closed fin fifth spine reaches beyond ninth ; eleventh spine shortest ; twelfth and thirteenth successively a little longer, apparently a part of the soft dorsal. Rays of soft dorsal abruptly longer than the last dorsal spines, the fourth and fifth longest, equal to the sixth spine ; fin decreases slightly in height posteriorly, last ray one half of fifth. Depth of caudal peduncle a little less than one third of head ; caudal fin gently rounded, middle rays two in head. First anal spines short ; second slightly longer than maxillary, not specially thickened ; first and second soft rays of anal longer than second spine ; distal border of elevated fin perpendicular ; last ray less than one half of first in length. Ventrals and pectorals same length, equal to length of head behind eye. Dis- tance between insertion of ventrals and first anal spine one third greater than depth of body. Entire body scaled except jaws and region between rami of lower mandible. Soft dorsal and anal with scaly sheaths along their bases. Scales on snout minute. Lateral line straight anteriorly, over tip of pectoral bent somewhat downward, from here to caudal peduncle slightly convex downward ; beyond this straight, continuous to edge of caudal fin. Snout with a large slit-like pore on each side, about four very small pores above and below each of these. Three pores at symphysis of lower jaw. Coloration in Life. — Above uniform dark brown, below paler silvery-brown; center of each scale on sides of body dusky -brown, forming conspicuous narrow, dark longitudinal stripes ; stripes below lateral line undulatingly horizontal, wider than those above, the upper ones cut off at middle of body by deflexure of lateral line; stripes above lateral line anteriorly running backward and upward, posteriorly horizontal, extending to end of caudal peduncle; fins plain brown. Taken at Charles and Seymour Islands. The following table gives comparative measurements of Corvula eurymesops, and of one specimen of C. macrops in the Stanford University collection from Mazatlan. NEW FISHES 197 MEASUREMENTS OF Corvula eurymesofs AND Corvula macrops. Catalogue No. Leland Stanford Jr. University Museum. Corvula eurymesops. c. ma- crops. «3°5- (^C) 12306. 12307. Length in mm 156 31 31 22 23 53 27 29 XIV 24 9 46 148 29 32 22 23 52 26 29 XIII 23 9 50 137 27 32 22 23 48 26 27 XIII 24 8 46 131 28 32 23 23 11 27 XIII 24 9 47 161 35 30 22 22 49 3i 25 XII 25 9 48 Depth Head Ventral Maxillary: Head Eye: Head Interorbital : Head Second Anal Rays . Scales on Lateral Line. SCI^ENA PERISSA sp. nov. Type. — Cat. No. 6360 Leland Stanford Jr. University Museum. Tagus Cove, Albemarle Island. Diagnosis. — Distinguishable from any other member of the genus by the weakly serrated preopercle, enlarged anal spine and the small number of spines in the dorsal. Description of the Type. — Length 183 mm. ; depth two and three fifths; head about three; upper profile of body strongly convex, greatest depth at front of soft dorsal ; ventral profile much less con- vex, evenly rounded ; snout blunt, rounded ; lower jaw included, sym- physis nearer vertical from anterior nostril than from point midway between anterior nostril and snout. Tip of snout slightly lower than anterior nostril, strongly receding to mouth; mouth nearly horizontal; profile from snout to nape almost straight. Snout below tip with eight pores, a large slit-like pore on each side, three just above mouth, three very small ones just above these; symphysis with five pores, one small, slit-like, median one, two on each side, of which the posterior is the larger. Teeth small, in bands along sides of jaws, the outer ones, especially in upper jaw, enlarged ; bands in lower jaw wide in front, tapering posteriorly ; no vomerine teeth. Anterior nostril lower and smaller than posterior. Suborbital a little narrower than vertical diameter of eye. Ascending limb of preopercle very weakly serrated, inclined forward ; space between its upper end and orbit equal to vertical diameter of eye. Opercle with wide membranous flap on posterior border above angle. 198 HELLER AND SNODGRASS D. X, 33. First dorsal spine very short; second abruptly much longer ; the fourth longest, two and one half in head ; posterior bor- der of fin almost vertical, last spine longer than ninth. Second dorsal fin low in front, gradually rising toward posterior end where border curves abruptly downward ; the longest ray, the twenty-sixth, three in head, about equal to second dorsal spine. Anal short, II, 8 ; second spine two and one half in head ; first and second soft rays longest, two in head, longer than fourth dorsal spine. Depth of caudal peduncle a little less than three in head. Caudal fin gently rounded, middle rays almost two in head. Upper rays of pectoral longest, one and two fifths in head. Snout, subopercle, jaws and chin bare, rest of body covered with small ctenoid scales ; small, irregularly arranged scales along lateral line. Specimens of this species were secured at Tagus Cove and Eliza- beth Bay, Albemarle Island and at Seymour Island. Coloration in Life. — Above dusky-brown ; belly grayish ; lips flesh-color ; fins dusky ; iris golden-brown. MEASUREMENTS OF Scicena perissa. Catalogue No. Leland Stanford Jr. University Museum. 12301. (§B? 12302. 12303. 12304. 210 187 18* 178 167 147 Depth 70 ^6 3Q 38 28 78 Head V7 •1C 36 -1C 77 Pectoral: Head 67 CO 62 67 65 58 Ventral : Head 54 58 64 5Q 6? • <55 Snout : Head 28 24 24 22 27 25 Eye: Head 2O 26 24 25 21 2A Dorsal Spines x x x x s x Second Dorsal Rays M •3-1 •17 7T 72 7T Second Anal Rays 7 •R °8 °8 °8 7 AZURINA EUPALAMA sp. nov. pi. v. Type. — Cat. No. 6352, Leland Stanford Jr. University Museum. Hood Island. Diagnosis. — Differs from A. hirundo in being more slender, in having the lateral line more nearly straight, the tip of the snout blunter, the interorbital space wider, the nape less elevated, the ven- tral profile of the body more convex, it being more convex than the upper, and in having the color olive and gray instead of blue. PROC. WASH. ACAD. SCI. VOL. V NEW FISHES 199 Description of the Type. — Length 92 mm., depth three and four sevenths ; head three and four sevenths ; pectoral four and one third ; ventral five and four fifths; D. XIII, n ; A. II, 12. Upper profile of head and body very gently and evenly curved from tip of snout to a little in front of base of caudal. Posterior end of caudal peduncle a little deeper than median part. Ventral profile of head and body also evenly curved, but more convex than the dorsal. Mouth oblique, on level with middle of caudal peduncle. Eye irreg- ularly elliptical, longest diameter vertical. Preorbital narrow, least width about two and one half in vertical diameter of eye. Interorbital space equal to vertical diameter of eye. Upper limb of posterior mar- gin of preopercle almost vertical, angle prominent, whole margin entire. First dorsal spine short, considerably shorter than the others, equal- ing horizontal diameter of eye ; third, fourth and fifth spines longest, two in head ; second a little shorter than the third ; spines back of fifth gradually decreasing in length ; the last shorter than the first. Pro- file of soft dorsal rounded, median rays longest, about three fourths of longest spine. Anal longer than soft dorsal, not symmetrical with it, anterior rays longest, a little longer than second anal spine which is equal to length of longest soft dorsal ray ; first anal spine very short. Caudal deeply forked, upper lobe very slightly longer than lower, outer edge of each gently convex posteriorly. Pectoral equal to great- est depth of body below lateral line, upper rays longest. Ventral one and three fourths in head, tip not prolonged into a filament. All parts except lips, fins, and space about nostrils scaled. Scales of body large, in thirty-two oblique series. Lateral line continuous, extending entire length of body, very gently convex dorsally. Coloration in Alcohol. — Brown, paler beneath, with longitudinal pale area on middle of each scale forming indistinct, pale, longitudinal stripes along the sides of body ; a prominent black area on axil, cov- ering also both sides of the base of the pectoral ; caudal dusky with both margins of the lobes pale; soft dorsal and anal dusky along bases ; otherwise fins plain brown like body. Coloration in Life. — Above dusky olive with bluish iridescence, sides lighter dusky-gray, belly silvery, snout pure dusky ; dorsal dusky, base of soft dorsal black ; axil and base of pectoral black ; pectorals, ventrals and anal pale ; caudal pale with a dusky oblique streak through each lobe. Variations. — The eight specimens secured present scarcely any departures from the characters of the type as described above. Taken at Charles and Hood Islands. 200 HELLER AND SNODGRASS MEASUREMENTS OF Azurina eupalama. Catalogue No. Iceland Stanford Jr. Universit3r Museum. (Type) 6352. 12299. 12300. Length in mm. . .. . .. Q2 86 8«> 8l 80 Depth 08 2Q 3$ <* 2Q Head 28 78 2Q 2Q IO Pectoral 21 23 24 22 24. Ventral 17 18 18 18 18 Vertical Diameter of E ye : Head 7Q •?o 2Q 10 11 Interorbital : Head 7-1 12 IO 10 11 Preorbital * Head . IO Q IO IO IO Dorsal Spines XIII XIII XIII XIII XIII Second Dorsal Rays II II II ii ii Second Anal Rays.. . . 12 12 12 12 12 Scale Rows .. 12 12 12 12 12 POMACENTRUS REDEMPTUS sp. nov. pi. vi. Eupomacentrus rectifranum, JORDAN & MCGREGOR, Rep. U. S. Fish Com- mission, for 1898, p. 282, 1899 (Clarion and Socorro Islands). Eupomacentrus flavilatus, JORDAN & MCGREGOR, Rep. U. S. Fish Com- mission for 1898, p. 282, 1899 (Socorro, Clarion and San Benedicto Islands). Type. — Cat. No. 6358, Leland Stanford Jr. University Museum. Clarion Island, Revillagigedo Archipelago. (Collector : R. C. Mc- Gregor.) Diagnosis. — Forehead very evenly retreating from snout to front of dorsal ; preopercle narrow, about two thirds of eye in adult ; inter- orbital space about equal to eye ; preopercle more strongly serrated than in P. leucorus ; lips dark ; young with posterior part of the body, caudal peduncle and posterior half of soft dorsal orange ; color other- wise brown, with diffusion of orange posteriorly in adults. Description of the Type. — Length no mm. Profile from snout to first dorsal straight, inclined backward at angle of about 45° with longitudinal axis of body. Dorsal spines gradually increasing in length posteriorly. Median rays of soft dorsal longest, reaching a little past base of caudal fin ; last rays very short ; profile of dorsal fin straight and horizontal from fourth spine to longest soft ray, so that both spines and soft rays successively more inclined backward pos- teriorly, the posterior longer ones being no higher than the anterior shorter ones in unelevated fin. Last soft rays horizontal. Anal similar to soft dorsal. Lobes of caudal rounded, upper lobe the larger. Upper rays of pectoral longest. Depth two; head a little less than three; D. XII, 15 ; A. II, 12; eye three and four sevenths in head ; least depth of preorbital one and one half in eye. PROG. WASH. ACAD. SCI. VO.L. V PLATE VI NEW FISHES 2OI Interorbital space a little wider than diameter of eye. Suborbital gradually decreasing in width as it curves upward and backward below eye ; inferior margin with irregular serrations. Upper limb of pre- opercle a little inclined backward from angle ; serrature well developed, obsolete at angle. Several conspicuously enlarged scales on the opercle, one very large one above base of pectoral ; twenty-five oblique scale rows on body. Lateral line continuous, crossing the first nineteen rows of scales, ends below middle of soft dorsal. Color in Alcohol. — Brown, paler on caudal fin and peduncle ; lips dark like rest of head; posterior borders of scales of body darker, forming dusky vertical stripes ; a distinct black spot on upper edge of base of pectoral, not in axil. Variations. — The preceding description of the type applies almost without change to the other adult specimens. In some, the upper limb of the posterior preopercular margin is inclined backward more than in the type, while in others it is less so, being in some almost vertical. Young Specimens. — One immature specimen 72 mm. long has the anterior upper profile somewhat rounded, resembling in this respect E. arcifrons. Another 60 mm. long, however, has the profile the same as in the adults. These specimens, especially the smaller one, have the caudal peduncle, basal part of caudal fin, posterior part of body back of middle of soft dorsal, and posterior half of soft dorsal pale orange. In all ages the spot on the base of the pectoral is very distinct. In the specimen which is 60 mm. in length one scale on the back of the caudal peduncle is dusky posteriorly, forming a rather prominent mark on the prevailing yellow color. There is no trace of spots on the scales of any of the specimens. The species is known only from Clarion, Socorro and San Benedicto Islands of the Revillagigedo Archipelago. MEASUREMENTS OF Pomcicentrus redemptus. Length in mm no IO7 IO7 106 106 72 60 Depth 52 C2 CO 52 CO CO Head •TO •71 7Q us part of dorsal with scaly sheath almost concealing the spines. Lateral line on twenty-two scales, ending below posterior part of soft dorsal. Coloration in Life — Sides bluish-brown, back with scales hazel in center, dark brown peripherally ; a broad light-rusty vertical bar on sides above anus, tapering above and below, snout light brownish-red ; fins dusky ; lips dusky-bluish ; belly and sides of head light brown ; iris blue. The different specimens present but little variation. The crescent- shaped notch which is present in all specimens on the posterior border -of the opercle above the spine is covered with membrane. Some specimens have two small spines in the notch, as in the type, while in Proc. Wash. Acad. Sci., Sept., 1903. 2O6 HELLER AND SNODGRASS others these are lacking. The second dorsal is proportionally lower in specimens smaller than the type. Young (40-62 mm. long). — General shape same as that of adults. Teeth entire ; preorbital and suborbital scaleless ; preorbital a little less in depth than in adults (in adults almost equal to eye, five in head), in young two in eye, seven in head, but eye much larger in young, three in head (in adults four and one fourth in head) . Color, above black with bluish iridescence ; head and base of anal and dorsal with bright blue spots. This species was taken at Tagus and Iguana Coves and Elizabeth Bay, Albemarle Island. MEASUREMENTS OF Nexilosus albemarhus. Catalogue No. Iceland Stanford Jr. University Museum. (Type) 6359- 12290. 12291. 12292. 12293. Length in mm 2OO IQ7 IQ? 1 70 1 66 Depth 54 C2 CC C2 S7 Head 2Q 28 TO 2Q -IQ Eye: Head 24 24 24 21 21 84 7Q 75 7O 80 63 60 61 60 63 Pectoral • Head Q2 80 82 QO Ventral • Head «1 § 86 77 8-5 Dorsal Spines • XIII XIII XIII XIII XIII Second Dorsal Rays . 17 18 18 18 18 Second Anal Rays 17 JC *3 14 14 Scale Rows ... 28 28 28 28 27 SCARUS NOYESI sp. nov. pi. ix. Type. — Cat. No. 12332, Leland Stanford Jr. University Museum. Tagus Cove, Albemarle Island. Description of the Type. — Length 428 mm. Depth two and one half; head two and two thirds; D. IX, 10; A. Ill, 9. Dorsal and ventral outlines evenly rounded, the dorsal a little more convex than the ventral. Snout blunt, thick, rounded symmetrically with lower jaw ; profile before eye very slightly concave. Upper lip leaving marginal space of jaw exposed for about one third the width of eye ; lower jaw with a somewhat wider exposed space ; margin of upper lip horizontal, of lower oblique, forming an angle of 30° with margin of upper. Dental plates white, upper with two small, conical, outwardly directed posterior canines at angle of lips. Nostrils very small, anterior circular, posterior a longitudinal slit. Eye, eight in head. Six vertical rows of scales on cheek below eye ; first, second and fourth of two scales each ; third of three scales, fifth of four scales PROC. WASH. ACAD. SCI. VOL. V PLATE IX NEW FISHES 2O7 and sixth of two scales placed high so that the upper overlaps the lower anterior scale of scaly area behind eye ; opercles with large scales. Snout, lower jaw, top of head before eyes and circum-ocular region naked. Dorsal fin begins at vertical from base of pectoral, of uniform height throughout except posterior end which is a little ele- vated. Caudal peduncle deep, outlines concave, depth two and two fifths in head ; upper and lower outlines of caudal fin convex, angles produced, median posterior margin straight ; middle rays two in head, upper rays two thirds longer, lower about one half longer than median rays, upper and lower rays thickened. Anal similar to soft dorsal, highest posteriorly ; spines three, the first very small, hidden beneath the skin close to the second. Second and third of equal size, same length as anterior soft rays of anal ; pectoral of fourteen rays, the upper the longest, one and one third in head. Ventrals simple, short, two in head. Scales large, twenty-two oblique series along lateral line. Lateral line beginning on fourth scale from ridge of back, and running back- ward over sixteen scales of third row below dorsal fin, then inter- rupted, beginning again on second scale below in same oblique series, and running backward over five more scales on middle of side of caudal peduncle. Coloration in Alcohol. — Plain green, dorsal and anal with green base and margin, yellow mesially ; dorsal with a small, median series of dark spots posteriorly. Coloration in Life. — Above light brownish-gray, with bluish-green iridescence, pinkish below, brightest on throat, chin and lips; dorsal with light blue-green margin and base; pectorals light yellow, first ray blue ; ventrals pinkish ; anal pinkish-brown with light-blue spots ; caudal light brownish like body with first upper and first lower rays blue-green ; blue spot above eye ; snout dark olive above ; iris golden. Another specimen was light olive-brown above, greenish on sides with pink margined scales. Variations. — The number of scales in the different rows on the cheek varies somewhat, but there are always six in the arc formed be- neath the eye by the uppermost scales of each vertical series. The smaller specimens have the angles of the caudal less produced than the larger ones such as the type. The tubes of the lateral line are irregularly branched on each scale. The two parts of the lateral line generally overlap on one scale row only, but occasionally on two. Our specimens are from Albemarle, Narboro, Duncan and Seymour Islands. 208 HELLER AND SNODGRASS Named for Captain Wm. P. Noyes, the sailing master of the ex- pedition. MEASUREMENTS OF Scarus noyesi. Catalogue No. Iceland Stanford Jr. University Museum. 12273. 12274. 12275. 12276. 12277. (Type) 12332- 12278. Length in mm •200 342 •55:7 36s 380 428 4CC Head 28 •5£ oo/ 28 ouo 31 31 34 32 Depth ^6 •17 77 38 37 3Q 38 Pectoral: Head 7O 71 82 76 78 78 83 Ventral : Head 64 C2 6s cc SO S3 Eye : Head 1C 14 16 14 14 13 13 IX IX IX VIII VIII TX TX 10 10 10 IO II IO IO Second Anal Rays. Scale Rows ... 24 23 23 23 23 24 23 PONTINUS STRIGATUS sp. nov. Type. — Cat. No. 6343, Leland Stanford Jr. University Museum. Wenman Island. Diagnosis. — Snout and maxillary scaled ; tentacles short or want- ing on head ; preopercle with four spines, upper with a supplemental spine at base, humeral spine single; last dorsal spine much longer than the eleventh ; pectoral rays eighteen, extending past beginning of anal ; lateral line with twenty-four pores ; head two and five eighths ; eye three and one sixth. Color bright red, streaked and spotted with olive-brown. Description of the Type. — Head two and five eighths in length ; depth three and one fourth ; eye three and one sixth in head ; inter- orbital nine and one half ; maxillary two ; snout three and one sixth. D. XII, 10 ; A. Ill, 5; P. 18. Eye large, three and one sixth times in length of head. Snout short, equaling diameter of eye in length ; interorbital region deeply concave, narrow, width three times in eye ; occipital flat, bordered by low spines ; nape rising obliquely from occiput. Paired nasal, pre- ocular, supraocular, postocular, tympanic and parietal spines present ; nape with two pairs of nuchal spines ; humeral and paroccipital spines single ; suborbital carina with three spines ; preopercle border armed with four spines below angle, the first largest and with a supple- mental spine at its base, the third spine larger than second ; opercle with two broad flat spines, one situated at the angle. Head with short filaments at the bases of some of the spines, other filaments wanting. Maxillary extending to the vertical from middle of pupil, length one NEW FISHES 209 half of head. Gill-rakers free, short, length at angle one third the eye. Lateral line beginning at humeral spine and extending horizontally to the tail ; pores twenty-four. Scales small, finely ctenoid \ cov- ering the body, snout posteriorly, the occiput, cheeks, opercles and maxillary ; fin membranes, tip of snout, interorbital, premaxillary and lower jaw naked. Spinous dorsal high, third spine highest, equaling one half head ; eleventh spine much shorter than the twelfth ; first spine shorter still. Soft dorsal lower, rounded, height three and one fourth in head. Anal fin high, second spine much larger and heavier than third, its height slightly less than one half the head. Soft anal higher than the spinous, rays more or less free at tip. Ventrals long and pointed, extending to first anal spine. Pectorals broad and fan-shaped, median rays longest, reaching third anal spine. Coloration in Life. — Above bright red, the belly lighter, pinkish, dorsum and head above the level of the preopercular spine spotted or indistinctly streaked with dark olive-brown, spotted heaviest about the base of the dorsal fin ; sides below the dorsal fin streaked obliquely with olive-brown ; fins, spines and rays red, the membranes whitish, yellowish in the dorsal ; the soft dorsal and caudal fins spotted with olive-brown; upper half of pectorals olive spotted; the soft anal with a dusky central streak. In general form and coloration this species approaches P. sierra Gilbert, from the Gulf of California, but differs in the scaled maxil- lary, the higher and differently proportioned spinous dorsal and in the greater number and streaked character of the dark markings. The type was taken from the stomach, of a shark (Carcharhinus platyrkynckus) near Wenman Island. MEASUREMENTS OF THE TYPE OF PontinUS StrigdtllS. Catalogue No. 6343 Leland Stanford Jr. University Museum. 75 Head 1.8 Depth •IT Eye 12 Interorbital Width A 10 Snout 12 Height of Spinous Dorsal .... IQ Height of Spinous Anal ... 2O Pectoral •IO Ventral 26 Depth of Caudal Peduncle 10 2IO HELLER AND SNODGRASS ELEOTRIS TUBULARIS sp. nov. pi. x. Type. — Cat. No. 6348, Leland Stanford Jr. University Museum. Cocos Island. Diagnosis. — Scales 46, 16; eye greater than interorbital width; anterior nostril tubes extending beyond mouth ; maxillary reaching to below middle of eye. Head long, two and sixth sevenths in length. Description of the Type. — Head two and sixth sevenths in length ; depth four and three fourths ; width of head four and one sixth ; eye four and one half in head ; maxillary two and three fifths ; interorbital five; D. VI-I, 8; A. I, 8; scales 46, 16. Body short and compressed posteriorly. Dorsal profile low, highest at the beginning of the dorsal fin, descending obliquely to tip of snout. Head broad and depressed ; interorbital region flat or slightly concave ; mouth large, oblique, with lower jaw projecting. Teeth in both jaws small and subequal. Maxillary long, extending to vertical from middle of pupil. Anterior nostril with long tubes extending considerably be- yond the snout. Preopercular spine blunt, concealed and turned for- ward. Scales large, ctenoid, forty-six in a line from angle of opercle to end of vertebrae ; sixteen longitudinal series between dorsal fin and ven- trals. Dorsal fins separated by a slight interspace, spinous portion rounded and slightly lower than soft portion ; soft dorsal attached to seventh spine, angular in outline, all the rays being of nearly equal length. Anal fin similar to soft dorsal but more rounded, beginning posterior to origin of soft dorsal. Caudal fin long, three and one fourth in length, rounded. Pectorals obtusely pointed, reaching beyond origin of anal fin, rays sixteen. Ventrals pointed, inner rays longest, sepa- rated by an interval slightly more than one half the eye. Coloration in Alcohol. — Above olive-brown, darkest on the head and snout ; belly lighter brownish ; dorsal, anal and caudal fins closely barred with dusky; pectoral and ventral fins lighter, with less con- spicuous dusky bars. The nearest American ally of this species is E. amblyopsis of Sur- inam from which it differs chiefly in the much larger eye and longer head. PROC. WASH. ACAD. SCI. VOL. V PLATE X PROC. WASH. ACAD. SCI. VOL. V PLATE XI NEW FISHES 211 MEASUREMENTS OF THE TYPE OF EleotrJS tubulariS. Catalogue No. 6348 Iceland Stanford Jr. University Museum. Length in mm. . . 4.1 Head .. •ir Depth .. 2"\ Width of Head 24 Eye 8 Maxillary I* Interorbital Width 7 Snout 8 Pectoral 27 Ventral. IQ Height of Spinous Dorsal .... *3 Height of Soft Dorsal ... 16 Height of Soft Anal 18 Caudal •ii Depth of Caudal Peduncle 1C Length of Caudal Peduncle... 23 COTYLOPUS COCOENSIS sp. nov. Pl. XI. Type. — Cat. No. 6347, Leland Stanford Jr. University Museum. Cocos Island. Diagnosis. — Scales cycloid, large, fifty-six in a line from opercle to end of the vertebrae ; head, throat, disc and fins naked ; teeth of upper jaw tricuspid, those of mandible equal and separated; eye small, six times in head ; lips without emarginations ; pectorals short. Description of the Type. — Head four and one fifth in length, depth four and four fifths ; eye six in the head, maxillary two ; inter- orbital two and one half; D. VI-I, 10; A. I, 10; scales 56. Body subcylindrical anteriorly, becoming posteriorly more com- pressed; dorsal and ventral outlines nearly parallel. Head high and bluntly rounded anteriorly ; snout broad and flat, obtusely rounded ; interorbital region slightly concave. Nape with a median depression or groove extending from the occiput to dorsal fin. Mouth wide, in- ferior; lips with even margins, lower with two broad posteriorly situated papillae on gums. Teeth of upper jaw in a single series, numerous, slender and brush-like ; tip bent at right angles ; cutting edges tricuspid or trident-shaped; but soon becoming worn down even. Teeth of mandible subequal, well separated ; five on each side of jaw, anterior pair slightly smaller than posterior. Eye small, contained six times in length of head, one and three fourths times in interorbital width. Maxillary extending to vertical from posterior border of eye. 212 HELLER AND SNODGRASS Scales large, subequal, smallest on the nape, larger on the sides ; fifty six in a line from the angle of the opercle to the last vertebra. Scales cycloid with the exception of a few on the sides which are armed with several serrations medially. The body scaled excepting the throat ; the head, fin membranes and disc naked. Dorsals separated by an interval equal to three fourths the length of the maxillary. Spinous dorsal high, spines more or less free and flexi- ble at the tip, third and fourth spines highest, contained one and one fifth times in head. Soft dorsal longer and lower, rays of about equal length. Anal fin similar to soft dorsal but lower and anteriorly more rounded. Pectoral short, one and two fifths in head, obtusely pointed ; caudal short, broad and truncate at the tip. Ventral disc small, circular. Coloration in Life. — Above dark brownish-olive, thickly spotted with green and black spots the size of the scales ; sides of the body lighter olive; head above and on sides blackish; belly dusky-olive, unspotted, medially bluish ; disc amber-yellow, bordered anteriorly with maroon ; dorsals dusky, maroon-tipped, the soft portion with a black median stripe; pectorals dark brown, broadly maroon-tipped, the basal portion olive with dusky spots ; anal blackish ; caudal broadly maroon-tipped, the basal part dusky ; iris silvery. The shape of the teeth and distribution of the scales ally this spe- cies to S. salvini of Panama from which it differs in the larger and cycloid scales and in coloration. The species was found abundant in the streams about Chatham Bay. MEASUREMENTS OF Cotyloptis cocoensis. 6-* 80 52 Head . 24 22 24 21 21 18 Eye O4 4 Interorbital Width 07 7 12 II ii Height of Spinous Dorsal ... . IQ 22 18 Height of Soft Dorsal 14 I* 17 II q IO 17 17 18 Length of Disc 14 IO 14 Caudal 21 IQ 22 Depth of Caudal Peduncle 15 14 H GOBIUS RHIZOPHORA sp. nov. Pl. XII. Type. — Cat. No. 6349, Leland Stanford Jr. University Museum, Tagus Cove, Albemarle Island. PROG. WASH. ACAD. SCI. VOL. V <4, i NEW FISHES 213 Diagnosis. — Head three and one third in length; depth four and one sixth ; dorsal profile of head evenly rounded ; snout less than eye ; D. VI— I, ii ; A. I, 9. Color, above dark reddish-brown, head and body crossed by fifteen light vertical bars ; head below the level of eye black-spotted ; caudal and dorsal fins finely dark-barred. Description of the Type. — Head three and one fifth in length ; depth four and one sixth ; eye three and one half in head ; maxillary three ; snout three and seven eighths ; interorbital ten and one third ; D. VI-I, ii ; A. I, 9; caudal 27; pectoral 18. Body short, dorsal and ventral profiles low and subequal. Head slightly compressed, width less than height, dorsal profile slightly rounded from snout to nape. Snout short, less than diameter of eye in length. Mouth oblique, with projecting lower jaw ; maxillary one third length of head, extending to slightly beyond vertical from an- terior border of eye. Teeth in a double series in both jaws ; inner small and villiform ; the outer enlarged, canine and spaced. Eyes diameter large, greater than snout, situated close together, the inter- orbital consisting of a thin ridge. Scales large, ctenoid, twenty-eight in a line from base of pectoral to caudal fin. Whole head, breast, nape, base of spinous dorsal and fin membranes naked. Dorsal fin long, deeply notched before last dorsal spine. Spinous dorsal high, second and third spines somewhat produced but consid- erably shorter than in G. zebra, about one half head in height. Soft dorsal lower, with rays of about equal height, a few of the posterior shorter, not reaching base of caudal fin. Anal fin similar to soft dorsal, but not extending so far posteriorly, height equal to soft dorsal, pos- terior rays nearly as long as others, pectorals in the type with the tip of the rays worn ; normally pointed, one and one ninth the length of head. Ventrals jointed, inner rays longest, as long as pectorals; reaching anus. Caudal rounded, one and one fourth in length of head. Coloration in Alcohol. — Above, head and body dark purplish- brown ; body crossed by thirteen narrow, light, vertical stripes, about one fourth as wide as the dark interspaces, becoming obsolete on sides anteriorly, the light stripes with a fine dark line running through them ; head crossed by two oblique light stripes behind the eye which cross over the nape ; a pair below eye and a single posterior inter- orbital stripe above eye ; light spaces on head wider than on body, distinct, not forming reticulations ; head below level of eyes and belly lighter, pinkish; the dark areas below eye, the chin and branchio- stegal membranes spotted with dark brown ; soft dorsal and caudal fins 2I4 HELLER AND SNODGRASS light, barred with blackish ; spinous dorsal dark like back but bej- coming lighter at tip; venlrals and pectorals light without darker markings ; anal fin dusky. All the specimens agree in proportions and coloration with the type. The fins in most of the specimens are in poor condition. Allied to G. zebra, which species it resembles in proportions, shape and fin characters. This species apparently is marked with light stripes where G. zebra, possesses dark ones, the darker median stripes in the light areas-being represented by the darker median stripe in the dark stripes of the latter. The light stripes do not form reticulations below the eye as do the dark stripes on G. zebra. The species differs further in the more rounded dorsal profile of the head (which, in G. zebra is considerably angulated and projecting before the eyes), in the lower spinous dorsal, the shorter snout, the spotted head, and dark barred dorsal and caudal fins. In the collection are specimens from Albemarle (Tagus Cove), Nar- boro and Seymour Islands. MEASUREMENTS OF Gobius rhizophora. 22 5 2O 27 Head •11 2Q 27 Depth 2A 2/1 22 Eye . 8 Interorbital Width .... Snout 8 8 <; 7 Maxillary IO ii IO Height of Spinous Dorsal 14-4- T* 1C Pectoral 14-4- 28 22 + Ventral 28 25 Caudal 2T. 21 2A GOBIUS GILBERTI sp. nov. Pl. XIII. Type. — Cat. No. 6354, Leland Stanford Jr. University Museum. Narboro Island. Diagnosis. — Jaws with two series of teeth, the outer enlarged, consisting of four canines in each jaw. Dorsal fin VI— I, 14, first four spines greatly produced, reaching much past middle of soft dorsal. Color, above dark reddish, below and on sides lavender; the sides crossed by nine narrow, vertical, black margined stripes. Description of the Type. — Head three and two thirds in length ; depth four and one half ; eye three and one half in head ; interorbital 7; D. VI-I, 14; A. I, 14; scales 38. PROC. WASH. ACAD. SCI. VOL. V PLATE XIII a •f— i be 02 g 2 o —I O NEW FISHES 215 Body short, low, with dorsal and ventral profiles subequal, moder- ately compressed ; head with rounded dorsal profile, somewhat com- pressed, width equal to depth of the caudal peduncle ; mouth small, oblique ; tip of snout formed by the projecting mandible ; maxillary short, extending to vertical from anterior border of pupil ; both jaws armed with a double series of teeth, the inner series small, the outer enlarged and spaced, consisting of four canines in each jaw. The scales finely ctenoid, large, thirty-eight in a line from base of pectoral fin to last vertebra. Head naked ; body scaled excepting nape, breast, and belly mesially, which are naked. Dorsal fin deeply notched before the seventh spine, spinous part greatly produced, second spine longest and reaching twelfth dorsal ray, third slightly shorter, first spine exceeding fourth in length ; all the spines flexible and united by membrane to their tips. Soft dorsal lower, little rounded ante- riorly, ending squarely behind, posterior rays equaling the median in height and reaching base of caudal fin ; anal fin similar to the soft dorsal in shape and equaling it in height ; caudal rounded or subtrun- cate, equaling head in length. Pectorals pointed, upper rays atro- phied, lower free at tips ; median rays longest, reaching anal fin ; ventrals free from belly, pointed, reaching vent. Coloration in Alcohol. — Dark brownish, head and belly lighter brownish-yellow, body crossed by nine narrow, light, black bordered, vertical stripes ; a vertical bar below eye, another on opercle, a curved interorbital, a short occipital and a nuchal bar, and two postocular spots light, bluish-black bordered like the vertical body stripes ; caudal fin dusky with a few light spots at base, the other fins lighter ; dorsal spines blackish. Another specimen secured at Tagus Cove, Albemarie Island, is somewhat larger and lighter colored than the type, with the dorsal spines less produced, the longest reaching only to the fifth vertical stripe. The coloration in life of this specimen was as follows : Body pale-lavender, crossed by ten narrow, vertical, light-blue, black-mar- gined stripes, these stripes obsolete on the belly ; the head below the eye and the snout golden, above and on nape bright red, interorbital region olive ; bars and spots on the head distributed as in the type and colored like the vertical body stripes ; fins dusky, reddish tipped ; iris light olive. This species is apparently nearest G. dalli, of the Santa Barbara Islands, which it resembles in shape and in the character of its teeth and fins ; but the dorsal spines are much more produced, the scales larger and the coloration very different in pattern. Named for Dr. Charles Henry Gilbert, of Stanford University. 216 HELLER AND SNODGRASS MEASUREMENTS OF Gobius gilberti. 22. 5 2"> Head 27 78 Depth 22 2S Eve... 8 7 7 7 4" ii 12 40 24 Pectoral *2 2Q Ventral 21 2^ Caudal . 78 76 Depth of Caudal Peduncle H I"? ARBACIOSA TRUNCATA sp. nov. Pl. XIV. Gobiesox zebra GILBERT, in part, Proceedings United States National Museum, xxni, 1890, p. 452 (Duncan Island). Type. — Cat. No. 6341 Leland Stanford Jr. University Museum. Tagus Cove, Albemarle. Diagnosis. — Incisors broad, the median ones of both jaws even- edged, truncate ; a single enlarged canine behind the incisors ; dorsal and anal fins with six or seven rays ; eye large, one and one half times in interorbital width ; vertebrae thirty. Color, light olive-yellow, vermiculated and spotted above with darker; a blackish humeral spot ; four pinkish transverse bands on dorsum in life. Description of the Type. — Head three and one third in length ; depth six and two thirds ; eye five in head ; interorbital three and three fourths; disc one and one fourth; D. 6; A. 7. Horizontal profile of body narrow, head little wider than rest of body, opercles bulging somewhat on sides ; snout rounded. Dorsal profile low, rising slightly to middle of back; ventral profile horizontal. Mouth small, terminal ; both jaws armed with six broad incisors, the four median ones above and the two median ones below truncate, unnotched, their edges even ; lateral teeth tridentate with rounded lobes, the middle lobe projecting above the lateral ones ; both jaws with an enlarged, somewhat recurved incisor separated by a slight diastema from the posterior incisors. Gill-raker short, slender, seven on lower limb of arch. Opercular spine strong. Dorsal fin beginning slightly in advance of anal ; both fins short, similar, rounded, their anterior rays highest. Pectoral short, rounded, with broad bases, length two and one half in head. Caudal fin broad, rounded, length one and one half in length of disc. PROC. WASH. ACAD. SCI. VOL. V PROC. WASH. ACAD. SCI. VOL. V NEW FISHES 217 Coloration in Life. — Above and on sides light olive-yellow, vermiculated and spotted above with slate-blue; orbit with seven radiating bluish stripes, the anterior one extending forward to_mouth, the two lower ones running obliquely across cheeks and opercles; sides with twelve rather narrow bluish transverse bars, not extending on ventral or dorsal surfaces ; a blackish humeral spot, slightly smaller than eye ; back crossed by four broad pinkish bands, the first beginning behind the humeral spots ; ventral surfaces light yellow, immaculate ; fins olive, without spots, caudal fin and ventral disc edged with orange. There is considerable variation in the coloration. The collection contains two small specimens which show five broad dark cross-bars, as in A. zebra ; and some of the other specimens show faint traces of the same markings. The young have all the mandibular incisors tridentate, as in the adults of A. zebra. The small specimens collected by the Albatross at Duncan Island and referred by Dr. Gilbert to A. zebra, were evi- dently too young to show the specific characters of the teeth. Allied to A. zebra, differing in the truncate, unnotched median mandibular teeth and somewhat in coloration. Numerous specimens were secured at Tagus and Iguana Coves, Albemarle Island. MEASUREMENTS OF Arbaciosci truncatd. Length in mm •5Q je 7C l8 Head •5Q 2Q in •in Depth 1C 1C J7 IQ Width of Head 26 27 27 27 Eye 6 c Interorbital Width 8 8 8 8 Pectoral 12 14 12 12 Length of Disc 28 25 27 27 Depth of Caudal Peduncle IO Length of Caudal Peduncle IO 8 IO IO Caudal 19 19 20 17 MALACOCTENUS ZONOGASTER sp. nov. Pl. XV. Labrisomus delalandi GILBERT, Proc. U. S. Albemarle Island. Nat. Mus., xin, p. 452, 1890, Type. — Cat. No. 6352 Leland Stanford Jr. University Museum. Iguana Cove, Albemarle Island. Diagnosis. — Dorsal spines XXI or XXII, first spine higher than second, one and one half in eye ; whole lower surface heavily barred and spotted with dark brown. 2l8 HELLER AND SNODGRASS Description of the Type. — Head three and two thirds in length ; depth three and two fifths ; eye three and one half in head ; maxillary three; interorbital two in eye; D. XXI, n ; A. II, 20; scales 63. Shape of the head and body much as in M. delalandi, body pos- teriorly compressed and with dorsal profile little elevated. Mouth small, terminal ; jaws equal and armed with a single series of incisor teeth ; vomer with a semicircular patch of similar teeth. Maxillary short, extending to vertical from anterior border of eye. Nape with an oblique patch and the eye with a smaller supraocular patch of fila- ments. Diameter of the eye slightly less than length of snout. Scales cycloid, small, sixty-three in lateral line, head, breast, median line of belly, and bases of the ventral fins naked. Dorsal fin long, beginning at nape and extending nearly to caudal fin. Spinous dorsal high anteriorly, notched between fourth and fifth spines and again between nineteenth and twentieth, the first spine high, one and three fourths diameter of eye and considerably longer than second spine ; last spine about as high as third. Soft dorsal higher than the spinous, second ray highest, but little exceeding the other rays ; last ray reaching two thirds the distance to caudal. Anal fin long, not extending quite as far posteriorly as dorsal, deeply incised ; spinous portion short; soft part longer, the twelfth to the fourteenth rays longest. Pectorals rounded, rays fourteen, median longest. Caudal rounded, rays thirteen. Ventrals composed of three deeply incised rays. Coloration in Life. — Above, light olive, sides with five broad olive-brown bands, breaking up ventrally into blotches, above the median line of the sides the dark bands separated by light purplish areas spotted with brownish, below the median line these areas become tawny-brown ; head olive, rufous-blotched, opercle with a large circular dark blotch ; underparts whitish, barred and spotted, the bars about as wide as the interspaces ; branchiostegal membrane and throat very regularly barred ; dorsal fin amber-yellow, with rufous spots and red-tipped spines and rays ; pectoral membrane lighter, golden-yellow ; rays rufous-spotted, lower dark red; ventrals whitish like belly, brown-barred, rays red-tipped ; anal fin lemon with brown spots and red-tipped rays ; caudal fin like dorsal in coloration ; iris crimson. This species is close to M. delalandi of the mainland from which it differs in the possession of more than twenty dorsal spines, in the higher first dorsal spine, and in the barred lower parts. We have ex- amined twenty specimens of M. delalandi from Mazatlan, Mexico, and find the following variations in the fins ; dorsal XIX-XX, 10-12 ; anal II, 18-19. Our Galapagos material gives the following formulaB : PROC. WASH. ACAD. SCI. VOL. V PLATE XVI NEW FISHES 2I9 Dorsal fin, XXI, IT XXI, ii XXII, 1 1 XXI, 10 XXI, 10 XXI, ii XXI, ill XXI, ii Anal fin, II, 20 II, 20 II, 20 II, 20 II, 18 II, 19 II, 20! II, 20 Scales in Lat- | eral Line, 63 58 59 54 55 56 ~35\- The specimens in the collection are from Tagus and Iguana Coves, Albemarle Island. MEASUREMENTS OF Malacoctemis zonogdster. Length in mm 67 6-1 6} Head 28 78 27 Depth 2Q 26 •11 Eye ." 8 8 7 Interorbital Width •JC Maxillary Q Pectoral 27 ->6 27 Ventral 21 2"! 22 Height of Spinous Dorsal 14. 14. 14. Height of Soft Dorsal 16 17 JC Height of Anal 14. 16 16 Caudal 21 21 24. Depth of Caudal Peduncle 9 8 9 LEPISOMA JENKINSI sp. nov. pi. xvi. Type. — Cat. No. 6350 Leland Stanford Jr. University Museum. Iguana Cove, Albemarle Island. Diagnosis. — Dorsal spines nineteen ; interorbital width one and one half the diameter of eye ; dorsal profile of head evenly rounded ; scales large, fifty-six to sixty-one in lateral line. Color, above dark brownish-red with six blackish transverse bars on the sides ; below light, spotted with red. Description of the Type. — Head three and one third in length ; depth three and one eighth ; eye four and one half in head ; maxillary two and one fifth; interorbital six and one fifth; D. XIX, 1 1 ; A. II, 18; pores 58. General shape of body as in L. xanti, but the head higher with the dorsal profile more rounded and without an emargination at the nape. Mouth narrow, teeth anteriorly enlarged, the two lateral ones in front of the diastema recurved ; vomer with a v-shaped patch of five teeth, the median one largest ; vomerine teeth followed by two or three smaller palatine teeth on each side. Nuchal filaments well developed and much thicker than in L. xanti. Maxillary extending to vertical from middle of pupil. Interorbital wide, width one and two fifths diameter of eye. Scales larger than in L. xanti, fifty-eight (pores) in lateral line, eight scales between base of the dorsal fin and curved anterior part of 22O HELLER AMD SNODGRASS lateral line ; below this point to middle line of belly are twenty-three vertical series of scales. Dorsal fin long, notched before the last spine, spinous part low and slightly rounded, middle spines highest, two and five sixths in head. Soft dorsal much higher than spinous portion of fin, one and seven ninths in head ; posterior rays reaching base of caudal fin. Pectoral fin rounded, middle rays longest, extending to vertical from second anal spine ; rays fourteen. Ventral fin with three rays, the middle one longest, one and three fourths in length of head. Caudal fin rounded, twice the length of longest dorsal spine, rays thirteen. Coloration in Life. — Above dark brownish-red, blotched and spot- ted with dusky ; sides of the body with six broad, blackish transverse bars ; ventral surface whitish with ruby-red spots ; vertical fins like the sides ; pectorals dark barred with red rays ; ventrals light like the belly. This species is closely related to L. xanti of the Pacific coast of Mexico, differing in the wider interorbital, the larger number of dorsal spines, the more rounded dorsal profile of the head and the darker and more reddish coloration. We have examined seven specimens of L. xantiirom Mazatlan, Mexico, and La Paz, Lower California, and each of these possesses eighteen dorsal spines. Secured only at Iguana Cove, Albemarle Island. Named for Dr. Oliver P. Jenkins, of Stanford University. MEASUREMENTS OF Lepisoma jenkinsi. Length in mm oc 85 Q2 Head •21 7Q •*o Depth. ^2 32 2Q Eve .. 7 8 7 ii 0 0 14 ia 13 Interorbital Width c Height of Spinous Dorsal. .. ii 12 II Height of Soft Dorsal 17 17 16 Height of Soft Anal 16 1C 16 Pectoral 28 27 26 Ventral 20 10 IQ Caudal 22 20 21 Depth of Caudal Peduncle. IO IO 9 Dorsal fin .' XIX, ii XIX, ii XIX, 12 Anal fin II, 18 II, 18 II, 17 Scales (pores) 58 61 59 ENCHELIOPHIS JORDANI sp. nov. pi. xvn. Type. — Cat. No. 6345 Leland Stanford Jr. University Museum, Tagus Cove, Albemarle Island. PROG. WASH. ACAD. SCI. VOL. V PLATE XVII £> •»'• NEW FISHES 221 Diagnosis. — Body greatly attenuate, head twelve in length, depth seventeen in length ; vertical fins confluent, low ; dorsal fin beginning much behind the anal ; teeth small, in a single series in each jaw and on the palatines ; vomer with a rounded patch of larger teeth. Color, pinkish, the belly silvery and the tail bluish; belly, snout and body posteriorly spotted with brown. Description of the Type. — Head twelve in the length ; depth one and seven tenths in length of head ; eye five and one fourth ; maxillary two ; interorbital five and one half ; snout four and one half. Body greatly attenuate, tapering very gradually from behind the head to the slender whip-like tail ; not much compressed. Head long, depth one half the length; dorsal profile sloping gradually to bluntly rounded snout. Snout short, broad and rounded ; occiput and interorbital regions convex or rounded. Mouth large, slightly oblique with included lower jaw, maxillary extending much behind eye. Teeth small, cardiform, in a single series in both jaws ; palatines armed with a long series of somewhat larger teeth extending past angle of mouth; vomer with a small, rounded patch of teeth slightly larger than palatine series. Opercular bones without spines or free edges, the whole apparatus covered by the skin. Gills four, a short slit behind the last, free from isthmus and united below the throat; no pseudobranchiae. Gill-rakers short, few. Bran- chiostegal rays six. Gill openings ventral, narrow, the length two and one half in head. Body naked; lateral line without evident pores, running high and following outline of back ; beginning above opercle, extending for- ward on head to above eye, and posteriorly to slightly beyond body cavity. Vent situated below posterior border of opercle. Vertical fins confluent ; rays not evident ; dorsal fin beginning be- hind snout a distance equal to three times length of head, the fin an- teriorly very low, becoming higher posteriorly where equaling one third the eye in height. Anal fin beginning at vent, considerably higher than the dorsal, the height one half diameter of eye. Caudal fin and a few of the last vertebras missing. Pectoral and ventral fins wanting. Coloration in Life. — Head and body dusky-pink ; the belly silvery, the tail grayish-lavender ; iris greenish-gray. Coloration in Alcohol. — Light brownish-yellow, the snout, belly and body, posteriorly finely spotted with dark brown. The spotting perhaps due to the dissolving out of the silvery pigment by the for- malin in which the specimen was preserved, leaving the spots which were beneath it visible. Proc. Wash. Acad, Sci., Sept., 1903. 222 HELLER AND SNODGRASS We have not seen Miiller's figures of E. vermicular is, but his de- scription is so meagre that the two species can be only approximately compared. The coloration is very different, there being in our speci- men no trace of the blackish-brown color of the Philippine form. Named for President David Starr Jordan of Stanford University. The type was the only specimen taken. MEASUREMENTS OF THE TYPE OF Encheliofhis jordani. Catalogue No. 6345 Iceland Stanford Jr. University Museum. Length in mm 114 10 Depth: Head 67 Eye : Head iq Maxillary: Head 49 Interorbital : Head Snout : Head 22 Height Dorsal : Head 6 Height Anal • Head... 10 Petrotyx gen. nov. Characters. — Body not greatly attenuated or compressed; snout blunt, obtusely rounded ; lower jaw included ; teeth small, blunt ; in broad bands in both jaws and on palatines ; in a diamond-shaped patch on vomer ; opercular bones without spines or sharp angles . Vertical fins long, united, caudal not differentiated ; ventral composed of two rays, united for half their length. Snout and the tip of mandi- ble with short thick cilia. Lateral line single, wanting posteriorly. Scales cycloid; present everywhere except on tips of the fins, margins of the jaws, and tip of snout. Gills four, a slit behind the last ; gill- rakers few, short and thick, armed with minute teeth ; pseudobranchiae small. Branchiostegal rays eight. Head without evident muciferous canal openings. Air-bladder large, rounded posteriorly. Six pairs of pyloric caeca. Allied to Catcetyx. PETROTYX HOPKINSI sp. nov. Pl. XVIII. Type. — Cat. No. 6344 Leland Stanford Jr. University Museum. Barrington Island. Diagnosis. — Head five times in length; depth slightly greater; maxillary long, extending much behind eye ; eye small, eight times in head; gill-rakers short, stout, one 4- two; scales one hundred and thirty-five in a series from base of pectoral to end of last vertebra ; dorsal rays one hundred and five ; anal eighty -two ; caudal ten ; ven- PROG. WASH. ACAD. SCI. VOL. V NEW FISHES 223 trals two, the height three fourths the head, filamentous at tip ; pec- torals short, fan-shaped, with broad bases. Description of the Type. — Head five in length ; depth f oiir^and four fifths ; eye eight in head, interorbital four ; snout three and three fifths ; maxillary one and four fifths ; D. 105 ; A. 82 ; C. 10; P. 24; V. 2 ; scales 11-135-38. Vertical outline of body subfusiform, tapering from about the eighth dorsal ray ; posteriorly compressed and attenuate to a point. Head broad and flat above with a furrow on each side of vertex run- ning forward to above eye ; sides of the head nearly vertical. Snout broad and bluntly rounded, tip formed by ciliated portion above pre- maxillary ; mouth wide, horizontal, with included mandible ; maxillary long, extending behind the anterior border of eye a distance equal to length of snout, only the posterior lower edge exposed. Teeth small and rather blunt, in broad close-set villiform bands in both jaws, the inner mandibular series slightly enlarged ; arranged in an oblong patch on palatines and in a large diamond-shaped patch on vomer. Tip of the snout fringed with narrow or ligulate, ciliated flaps ; the man- dible with shorter similar cilia at its tip. Opercular bones without spines, their angles rounded. Head without evident muciferous canal openings. Gills four, a slit behind the last, free from the isthmus; pseudobranchiae represented by six or seven short filaments ; gill-rakers one-J-two, stout, club-shaped and shorter than the gill-filaments, armed with small teeth similar to those on the pharyngeal bones. Scales cycloid, covering entire body and head, absent only on premaxillary, maxillary, anterior portion of snout, margin of mandible, and tips of fins ; exposed portion of the scales about one half diameter of eye in length. Lateral line slightly undulate, beginning above opercle, curving slightly and following outline of back, extending slightly beyond middle of dorsal fin ; running between the scales, dorsal fin beginning slightly behind the base of pectoral ; all the rays of about equal height, six and one third in head. Anal beginning at anus, equal to dorsal in height and similar to it in shape ; caudal fin pointed, slightly longer than the height of the dorsal ; not differen- tiated from vertical fins. Pectorals with wide bases, fan-shaped, the middle rays longest, length one and two thirds in head ; ventral com- posed of two rays, united for half their length, filamentous at tip, outer ray the shorter, about three fourths the length of inner ray, which is one and one third in head. All the fins excepting the ven- trals densely scaled to their tips, which are free and filamentous. Air- bladder large, oval, posteriorly broader and rounded, more pointed 224 HELLER AND SNODGRASS anteriorly ; six pairs of pyloric caeca, the posterior one longest and equalling the snout in length. Coloration in Life. — Dark reddish-brown, the head darker brown ; vertical fins like the body, the tips maroon ; pectorals with lighter edges ; iris livid-bluish. Named for Mr. Timothy Hopkins, of Menlo Park, California, to whose generosity the expedition is financially indebted. MEASUREMENTS OF THE TYPE OF PetrotjX Catalogue No. 6344 Iceland Stanford Jr. University Museum. Length in mm Head Depth Eye Interorbital Width. Snout Maxillary Height of Dorsal. Height of Anal.... Pectoral Ventral Caudal Snout to Dorsal .. Snout to Anal... 217 20 21 2-5 5 5-5 ir 6 6 12 15 8 25 45 Eutyx gen. nov. Characters. — Body comparatively short, compressed posteriorly; head broader, scarcely compressed, with a short rounded snout. Mouth large, with long maxillary ; mandible included ; teeth small, in villi- f orm bands in both jaws and in a V-shaped patch on vomer ; the inner mandibular series of teeth enlarged ; palatines toothless ; opercular bones without spines or sharp angles ; head with prominent mucif erous canal openings ; lateral lines two on each side, overlapping for a fourth of their lengths ; scales small, cycloid, embedded ; present on body and opercles ; head above naked. Gills four, a slit behind last ; pseudobranchiae wanting; gill-rakers few. Air-bladder moderately large, oblong, thick-walled; pyloric caeca consisting of two short sacs. Allied to Grammonus Gill, differing in the absence of opercular spines, and in the presence of the double lateral line and large mucif - erous canal openings on the head. EUTYX DIAGRAMMUS sp. nov. Pl. XIX. Type. — Cat. No. 6346 Leland Stanford Jr. University Museum. Tagus Cove, Albernarle Island. PROC. WASH. ACAD. SCI. VOL. V a g SP H NEW FISHES 225 Diagnosis. — Head four times in length; depth slightly less; man- dible with slightly enlarged teeth ; opercular bones without spines ; lateral line double for a fourth of its length ; scales one hundred and twenty-two ; dorsal fin long, beginning posterior to base of pectorals, rays one hundred and six ; anal eighty-nine ; pectorals twenty-seven. Color, uniform dark brown. Description of the Type. — Head four in length ; depth four and one sixth ; eye five and one half in head ; snout three and five sevenths ; interorbital four and one fourth; maxillary one and two thirds ; D. 106; A. 89; P. 27; C. 10; scales 14-122-35; pores f-g-. Vertical profile of body elliptical, dorsal and ventral outlines sub- equal ; body compressed and tapering to a point posteriorly. Head large and rounded over vertex, dorsal profile converging sharply toward the short, bluntly rounded snout ; interorbital region convex. Mouth large, with a long maxillary, extending behind eye a distance equal to length of snout ; cleft slightly oblique ; mandible included ; teeth small, in villiform bands in both jaws ; the inner mandibular series en- larged and consisting of about twenty large, spaced teeth, the posterior largest ; vomer with a V-shaped patch of small teeth ; palatines tooth- less ; opercular bones without prominent angles or spines, their posterior edges covered with scales ; preopercle bordered below angle by a naked groove containing three large mucous canal openings . Tip of the snout and mandible with a pair of mucous canal openings ; upper part of the opercular membrane with a similar opening. Gills four, a long slit behind last, free from the isthmus ; pseudobranchiae wanting. Gill-rakers few, 0+3, short, club-shaped, length of longest one third diameter of eye, armed with minute teeth. Scales small, cycloid, em- bedded, covering body and opercle above angle of preopercle ; head above, snout, mandible and fin membranes naked ; scales on one side of the head deeply embedded and hidden beneath the skin. Lateral lines two, the upper beginning above opercle and extending to below middle of dorsal fin, following outline of back ; the lower line me- dian, beginning slightly before anus and extending horizontally to last vertebra ; the lines double for one fourth of their length ; pores thirty on upper line and forty on lower. A few pores below and running parallel with lower line. Lateral line extending on head from angle of opercle obliquely downward to tip of mandible. Dorsal fin long, extending from base of pectorals to the undifferen- tiated caudal fin with which it is merged ; rays of about equal height throughout, the anterior slightly shorter ; height of median rays, three and one half in head ; all the rays free at the tip and somewhat fila- 226 HELLER AND SNODGRASS mentous. Anal fin beginning at anus, similar in shape to dorsal which it equals in height. Caudal fin not differentiated from dorsal or anal fins, but slightly longer than these, two and two thirds in head. Pectorals with broad bases, pointed, extending to vertical from anus. Ventrals attached slightly posterior to isthmus, composed of two rays united their whole length, extending half-way to anus. Pyloric caeca two short, thick, sac-like projections about equaling the diameter of eye in length. Coloration in Life. — Dark brown, head purplish-brown ; fins blackish. A smaller specimen taken at the Seymour Islands varies somewhat from the type in the possession of longer fins and uniform purplish- brown coloration. Both specimens taken in about three fathoms. MEASUREMENTS OF Eutyx diagrammus. 87 c-j Head 2C 27 Depth . 24 2A Eye .... ... A C A c Interorbital Width 6 Cl Snout 7 7 TC *5 Height of Dorsal 7 Height of Anal 7 8 T6 18 1C 17 Caudal II 72 77 Snout to Anal 49 46 ANTENNARIUS TAGUS sp. nov. Pl. XX. Type. — Cat. No. 6351 Leland Stanford Jr. University Museum. Tagus Cove, Albemarle Island. Diagnosis. — First dorsal spine slender, terminated by a bifid cluster of long filaments; second spine curved downward at tip; D. Ill, 13. Head without fleshy flaps ; gill-opening below and slightly posterior to pectoral ; body and head covered with bifid spinules. Color, light pinkish and yellowish, dark -spotted, without ocelli. Description of the Type. — Head two and one third in length ; depth one and nine tenths ; eye seven in head ; maxillary one and four fifths; interorbital three and one third; D. Ill, 13; A. 7 ; P. n ; C. 9; V. 5 PROC. WASH. ACAD. SCI. VOL. V PLATE XX NEW FISHES 227 General shape much as in A. ocellatus ; body compressed poste- riorly ; breast and lower jaw tumid ; head wide, the width one and one third in length ; mouth dorsal with the cleft vertical and the mandible armed at the symphysis with a knob, projecting beyond the pre- maxillary ; mandible long, one and three fourths in head, naked, the posterior one third hidden beneath a deep fold of the skin ; teeth small, in villiform bands in both jaws, and on vomer and palatines ; head without large fleshy filaments about angle of mouth and mandible ; gill-openings small, without naked areas surrounding them ; situated below and slightly posterior to waist ; head, body, fin-rays and spines armed with small bifid spinules, lacking only on premaxillary, max- illary, margin of mandible, first dorsal spine, depression behind second dorsal spine, five supraocular pits, fin membranes and on underside of pectoral and ventral rays ; spinules widely forked, with a small ten- tacle, exceeding the spines in length, between each two ; first dorsal spine slender, filamentous, terminated by a cluster of long filaments which are arranged in two more or less distinct clusters. Filaments more than two thirds the length of stalk, wrhich is slightly shorter than second dorsal spine ; second dorsal spine thickened, low, curved down- ward at apex, followed by a deep, smooth depression ; third dorsal spine higher and heavier, membrane deeply incised in front of the soft dorsal ; soft dorsal subrounded, much higher than spinous part, ninth and tenth rays highest, exceeding slightly the maxillary ; first ray short, truncate at tip, posterior rays reaching beyond base of caudal ; anal fin similar to soft dorsal, but more rounded and slightly lower ; pectoral fin geniculate, subrounded, some of upper rays longest, one and two fifths in head ; ventrals rounded, one half length of pectorals, situated below posterior border of eye ; inner ray divided ; caudal evenly rounded at tip, rays all divided, length slightly less than pectorals. Coloration in Life. — Above pinkish or flesh-color, spotted and streaked with light and dark olive-brown ; a small unspotted area above pectoral, below creamy with dark olive-brown spots ;' chin and snout faintly dark spotted ; orbit below and posteriorly with radiating dark streaks ; first dorsal spine light with dusky cross bars, second and third spines without dark spots ; soft dorsal spotted like back, anal fin similar ; pectoral and ventral fins immaculate below, dusky, dark spotted above ; caudal fin with two series of dark spots on membrane running vertically through fin ; iris light golden-brown. This species is nearest to A. ocellatus, differing in the coloration, the bifid filaments of the first dorsal, and the lack of dermal flaps on the head, at the angle of the mouth and on the mandible. 228 HELLER AND SNODGRASS MEASUREMENTS OF THE TYPE OF Antennarius tagus. Catalogue No. 6351 Iceland Stanford Jr. University Museum. «;8 Depth er-i Head AT. Width of Head. s Eye .- 6 Interorbital Width T'l Maxillary 2C Height of First Dorsal Spine Height of Second Dorsal Spine IO Height of Soft Dorsal 26 Height of Anal • ... 2/1 Pectoral from Gill-opening. •IT Ventral .. 18 Caudal 30 Genus Allector gen. nov. Characters. — - Body short, stout, and not much compressed ; head large, cuboidal, armed with a pair of stout supraorbital spines ; mouth large, vertical in position, premaxillary and mandible armed with canine teeth ; vomer and palatines toothless ; soft dorsal and anal fins with bases short, posterior in position ; pectorals geniculate ; ventrals wanting. ALLECTOR CHELONL^ sp. nov. FIG. i. Allector chelonice. Type. — Cat. No. 6342 Leland Stanford Jr. University Museum. Taken between Clipperton Island and Galapagos Archipelago. Diagnosis. — Head large, two and three sevenths in total length, broad and flattened above, with a pair of supraorbital spines ; teeth in both jaws irregular, not greatly enlarged, longest equaling diameter of pupil ; vertical fins filamentous at tip ; 0.3; A. 3 ; C. 9 ; P. 18. Description of the Type. — Head two and three sevenths in length ; depth two and two thirds ; eye contained seven times in length of head ; NEW FISHES 229 interorbital two and one half ; maxillary one and two thirds ; mandible one and one half ; D. 3 ; A. 3 ; C. 9 ; P. 18. Head large and cuboidal, broad and flat above with vertical sides, terminated squarely anteriorly by the vertically placed mandible ; mouth large, the cleft exceeding one half the head in length. Upper jaw margined by the premaxillary, which is armed with a single series of irregular teeth somewhat smaller than the mandibular teeth ; length of the maxillary one and two thirds the length of head. Mandible toothed its whole length with a single series of large, irregular, sharp, canine teeth which are slightly compressed at their bases, length of longest teeth about equaling diameter of pupil ; mandible with a prominent projection at its posterior end. Eye comparatively large, diameter contained three times in interorbital width. Head armed above by a pair of short, stout, horn-shaped spines situated above and behind the eye ; branchiostegal rays five. Body short, more or less compressed and tapering slightly to the thick peduncle ; dorsal fin short, consisting of three rays, situated a little in advance of base of caudal fin, rays filamentous at tip, reaching past base of caudal, length one and two thirds in head. Anal fin similar to dorsal in shape and composed of same number of rays, first ray situated slightly behind last dorsal ray, somewhat longer than dorsal, longest rays reaching past middle of caudal fin. Caudal long with filamentous rays, truncate or slightly rounded. Pectorals short, turned forward, rounded, contained three times in length of head. The specimen was taken from the stomach of a green-turtle, and the skin is all gone from the body. The flesh is whitish, the exposed bones brownish and the iris bluish-silvery. There is no indication of a spinous dorsal, not even of the basal elements of one. MEASUREMENTS OF THE TYPE OF Alhctor chelom