PLATE I.

Fig. 1. — Mijihuiri/goii acutulenn. Oiie-hall" natural sizi*. Krcim a sppciiueu m the possesBion of Prof. Leslie

A. Li'i', of ISowdoiii Colle('t', Maine.
Fig. 2. — The teeth of the upper jaw somewhat <li8arranj{e<l, from below ; one of them showing the base ;

twice nutnral size.
Fig. X — f)(i»ich-s of the sknll enlarged.

Fig. 4 a and b. Sections of a candal spine at base and at middle.
Fig. .'». — One of the candal spines, from below, one and one-half times the natural size; a, section near

the baM); b, section near the middle.
F'ig. ti. — Claile» cuneatun, two-thirds natural size. Pago 55.
Fig. 7. — I'rucacara tettudinaria, two-thicds natural size. Page 98.

U S 'JEOLOOICAL ."IJI'

n XIPHOTRYOON ACUTIDENE

KF'ATIJS «,5 7 PM

Tr,:--.'rTirniAF.IA

PLATE II.

Kiniires of Iioiich of fishes, natural size.

F'f^. \,-i.—(lniilrii falrox. Our imlividiiul. Page 54.

Fig. 1.— L»-ft maiKlilmliir rainii.s, both extmiiities lost, from above; a, from below; b, distal fractured

extmiiiJy.
•■'S- 2-— A IIIU8.S of matrix, including numerous scales, which exhibit both sides.
Figs. ;t-I.'..— Kra;;rii<Mit8 of another inilividiial of Clasles.

Figs. :{-(■>. — Cranial Imnes. >

Figs. 7-l.'>.— .Scales.
FigH. ll-'-'4.— Scalesof a large Clasltm.

FigN. 2.')-»').— Portions of the ski-l.-toii of Claiites vijcUftrua, found together. Page 54.
Fig. -J.-. —A iMirtion of the right nianilibuhir ramus, inner side; o, proximal elid ; 6, exterior view; o,

sniHTKir view of distal fragment.
Fig. V!(!.— Kepre.sentative of pterotic, (loubtfnll.v this species.
Figs. :tO-:i:t.— Cranial bones; :W, orliital bone.

Figs. :!4, ;t5.— Two ribs found with tlie bones, on opposite side of each
Figs. :m;-44.— Scales.

Fig. 4."i. — A broken vertelira, anterior vii'w; a, inferior view.

Fig. 4(i.— Vertebra of a larg.r CUixtrx, anterior view; a, posterior, and b, inferior view.
Figs. 4(MH.— .Scales from the anterior i»uti(m of the body of three dilierent Clastes.
Figs. .-)0-.VJ.— I'arts of an individual of t7a«/«« anax Cope ; a, inferior view. Page 54.
Figs. .V.'-54.-Anlerior vertebra; of an indivi.lnal of a species of I'appivhthys ; a, superior; b, lateral

views.
Figs. .I.')-;"!?.— H<ines of asecond I'ujipuhlhiis.

Fig. .V>.— »;»«ioccipital bone, jiosterior view ; n, inferior; b, superior views.
Fig. .'iti. — .Anterior vertebra.
Fig. ,'■.7.— Caudal vertebra; a, from above

Fig. .VJ.-ltasioccipital bone of a larger I'appkhthy,, posterior view ; a, from below.
Fig. KO.-Auterior vertebra of an unknown lish from behind; h, from before; «. from above.

U S GEOLCGICAL SlJHVETi" OF THE TERRITORIFS

PLATE II

T. Sinclair 6> SLT<.i,v.h Vhilad^

1-51. CLASTES. 58-6. PAPPICHTHYS.

PLATE III.

Portions of ekelotons of species of rappiclitlii/s, luituial size, except Fig. 7, which is half nataral size

Fig. 1. — Left deutary bone of Pappichthyi) xchrops, inner side ; a, external, and b, saperior views. Page 57.

Figs. 2, 11. — I'appichthj/K lacvis. One individual. Page 58.

Fig. 2. — Preuiaxillary bone of rappkhthijs laerin, external view; h, internal view; c, inferior view.

Page. 58.
Fig. 3. — Left dentary bone of same individual of Pappichthi/s laevis, external view; b, internal view.

Page 58.
Fig. 4. — ^The greater portion of the right inferior quadrate bone, the posterior portion of the condyle

wanting ; a, the same, i)osterior view.
J'ig. 5. — Portion of superior cranial wall, external face.
Figs. 0, 7. — Cranial bones.

Fig. 8. — Dcntigerous fragment of palatine or pterygoid bone, twice natural size.
Fig. 9. — Bone belonging to the hyoid system.

Fig. 10. — Abdominal vertebra, one-half wanting ; «, from above ; b, from below.
Fig. 11. — Caudal vertebra; a, from ahove; b, from below.

Figs. 12, IS). — Portions of skeleton of one individual of Pappichthys plwatus. Page 59.
Fig. 12. — Left maxillary bone, external view; «, internal view; b, inferior view; c, sectiou at fractured

anterior extremity.
Fig. 13. — Left deutary bone, exterior view; «, interior view; b, superior view.
Fig. 14. — Infericu- end of the right inferior quadrate, external side.
Figs. 15-16. — Cranial bones, external surfaces.
Figs. 17, 18. — Superior views of two broken abdominal vertebra.
Fig. 19.— Lateral view of a third abdominal vertebra.

U S GEOLOGICAL, SHRVKY OF THE TERRITORIES

PLATE ni

•^ Sinclair * Son.lith.Philada

1 PAPPTCHTHYS SCLEROFS. 2 - 11. P LAEVIS. 12 - 19 P PLICATUS

PLATE IV.

Bones of species of I'appichthys, uatural size.

Figs. 1-0. — Pappichthya plicatue. Ouc iutlividual. Page 59.

I-'ig. 1. — Right iiiaxillary bone, outer view; a, inner view.

Kig. '2. — f Dentary bone.

Fig. a. — Prootic bouf, lateral virw : a, i)ostcrior bonier view.

Fig. •!. — Cranial bone.

Figs. 5, C. — Posterior abdominal veriebral centra; a, from above; 6, from below; c, from the side.

Figs. 7-20. — Veriebral centra of a single individual of a species of Papjnchthys, probably P. medius.

Figs. "-IJ. — Abdominal vertelinc, both from before and behind; a, from above; h, from below; c,
lateral view.

Figs. 15-'J0. — Caud.'il v<'rtebrae ; a, from above ; h, from below ; c, lateral view.

Figs. "Jl-H.!. — PappichllojH comoni. Five individuals. Page CO.

Figs, yi, 22.— Part of dentary bone, with posterior abdominal vertebra of the typical specimen ; a, from
«l>ove; b, from below; c, lateral view.

Figs. 2;t-29. — Centra, &c., of another individual.

Fig. 'S.^. — Basioccipital bone, from behind ; o, from the left side; b, from above.

Figs. 24-'2-~'. — Abdominal vertebne; a, from above; 6, from below.

Fig. 29. — Caudal vertebra; a, from .above: b, from below.

Fig. 30. — Abdominal vertebra of another individual, which was regarded as belonging to another spe-
cies, which was named Pappichthya symphyaiii ; a, from above ; b, from below.

Fig. 31. — A superior view of a posterior abdominal vertebra of another individual.

Figs. 32-3(i. — Centra of another individual of I'appichthys corsoni; all abdominals excepting Fig. 35,
wliich is a caiidal ; a, from above ; b, from below ; c, from the side. Page CO.

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PLATE V.

Fisbes, natural size.

Figs. 1,2.—Iihvwastes})eltatus. Occipito-paiietal bone, Irom above; tlie anterior extremity of contact

Tvitli the frontal is entire ; a, from below ; h, from behind, showing the nuchal prolongation. Page ()3.
Fig. 2. — Dorsal spine, both ends wanting, left side; a, front ; b, posterior aspect.
Figs. Z,4.—Khincaste8 calvus. Page Glj.
Fig. 3. — Cranium inferentially restored from three fragments from the extremities, and auterior median

portion; superior surface; n, from below ; b, posterior view.
Fig. 4. — Adjacent parts of dorsal spine and its supporting intemeural bone.
Figs. 5-11. — Ilhineasles amithi. Three individuals represented by Figs. 5-9, 10, and 11, respectively.

Page 64.
Fig. 5. — Uasioccipital from below.
Fig. G. — Anterior vertebral mass, from below.
Fig. 7. — Dorsal vertebra, articular face; a. Literal view.
Fig. 8. — Articular cotylus of mandible, from above.
Fig. 0. — Pectoral spine, from side; o, from behind.

Fig. Ifl. — Pectoral spine of another individual, from the side; n, from behind.
Fig. 11. — Part of dentary bone of another specimen, external view ; a, vertical view.
Fig. 12. — Pectoral spine of Hhincastts arcuatiis, lateral view; a, posterior view. Page (50.
Fig. 13. — Ehincasteg pcctinaius. Inferior view of anterior part of skeleton. From Florissant, Colorado.

Pago 747.
Figs. 14-17. — Fragments of skull of f Ithiucuslcs raduhm, from near Fort Bridger. Page G7.
Figs. 18-20. — DapedogloHSUs acuius. Page 72.

Fig. 18. — Left dent.ary, hacking the posterior portion, external view; a, superior aspect.
Fig. 19. — Dentary bone of a second specimen, inner side ; a, from above.
Fig. 20. — Palatine ))one of a third individu.il.
Fig. 21. — Ainijzon commune. Typical speoimen, from Florissant, Colorado. Page 749.

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F-L^-TE V.

P.HINEASTES 36-20 L^t-Ej-

■T Sinclair & bon, Lith Philada

SUS 21 AMVZON COMMUNE H.

PLATE VI.

Fishes, natural size.

Fig. 1. — Dapedoglotiiu encaustiu. Portion of the side ; typical specimeu. Page 70.

Fig. 2. — Erismato}>teru8 ricksecheri . Page 81.

Fig. 3. — Diplomystus humiUs (on plate D. pusillus). Page 77.

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Fig. l.-Dapedoghmua teatU Cope. Five-sixths the uatural size. Page 71.
Fig. U.—Dapedogloasus (vquipinnis. Natural size. Page 73.
Fig. i.—Dapedoglossus sp. imlet. Natural size. Page 73.
Fig. i.—Diplomygtus analis. Natural size. Page 75.
Fig. b.—Amphiplaga bracUyptera. Natural size. Page 82.

PLATE VIII.

Fig. l.—Dapedoglomus teslis. Natural size. Page 71.

Fig. a.— Head of DapedogJossus testin. Natural size. Page 71.

Fig. 3. — DiplomyntuH analis. Natural size. Page 75.

Fig. 4.—rriscacarapcaIei. Natural size. Page 96.

PLATE IX.

Fishes from Greeu River City, Wyoming, natural size.

j.-j,,. 5,—Asineops squamifrona. Page 85.

?igs. 6, 7.—Eri8matopteru8 Icvatus. Types. Page 80.

Fig. S.—Diplomijstus humilU {pusillua). Page 77.

Figs. O-n.—Diplomystus altus. Page 79.

1 if. 12.— Young Diplomi/stus.

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PLATE X.

f\g. l.— Diplomt/Htus deHlatus. Two-thirds size. From Twiu Creek, Wyomiug. Page 74.
Fi<;. 2. — Diplomyatus analis. Natural size. From Twin Creek. Page 75.
Fig. 3. — Diplomyatus pectorosua. Natural size. From Twiu Creek. Page 76.
Fig. 4. — Uiplomyaiua humilia. Natural size. From Twin Creek. Page 77.
Fig. ."). — Diplomyatua allua. Natural size. From Twin Crock. Page 79.

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AHneopt aquamifroni, from Green River City, Wyoming, natural size.

U S GEOLOGICAL, SIJRVEY OF THE TERKITORIEa

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1-4- ASINEOPS SQUAMIFRONS

PLATE XII.

Fig. 1. — Mioplostis labracoides. Five-sixths natural size. Page 89.

Fig. 2. — Mioplosus longus. Natural sizi;. Page 89.

Fig. 3. — Mioplosm beanii. Natural size. Page 91.

Fig. 4. — Jmphiplaga hrachjiplera. Natural size. Page 82.

Fig. 5. — Erisinatopterut endlichi. Natural size. Page 82.

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Fig. 1. — Priacacara aerrata. Three-fourths uatural size. Page 93.
Fig. 2. — PrUcacara cypha. Three-fourths natural size. Page 94.
Fig. 3. — Priacacara clivosa. Natural size. Page 96.

li :; JEOLOGICAL S1JR\'EY OF THE TERRITORIE

PLATE >ail

T Sinclair A Son Lith.Philada

1. PRISCACARA SERRATA. 8 P CYPHA_ 3. P CLIVOSA

PLATE XIV.

Fig. 1. — Asinwpi pauciradiaius. Four-fifths uatural size. Page 87.

Figs. 2, 3. — PrUcacara Hops. Natural size. Page 97.

Fig. 4. — PrUcacara pealei. Natural size. Page 96.

Fig. 5. — Priecacara lerrata. Anterior portion of a rather small individual, natural size. Page 93.

PLATE XV.

Fiys. 1-12. — Axestusbijssinvs. Bonesof one individual, one-half uatural size. Type specimen. Page 116.

Fig. 1. — Cervic.ll vertebra ; a, from below ; b, posteKor extremity.

Fig. 2. — Two sacral vortebrie, left side ; a, from above ; b, anterior view of anterior vertebra.

Fig. 3. — A caudal vortobra ; h, from behind.

Fig. 4. — Scapular arch, right side, from behind.

Fig. 5. — HunicniK, from lichind; a, from side.

Fig. C. — Pelvic arch of left siili-, lacking ischium.

Fig. 7. — KigUt ilium.

Fig. 8. — Femur, from within ; a, from side.

Figs. y-11. — Phalanges.

Fig. 13. — Po.stabdomiMal bone, from below.

Figs. 13-1.5. — Eatlrianun aUahiatnn. Type, ime-third natural size. Page 140.

Fig. 13. — Half of anterior lobe of plastron, from below; a, from above.

Fig. 14.— Three posterior marginal boneSj from above.

Fig. 15. — Edge view of left hand of tig. 14.

i.i e GEOLOGICAL SlIRXTTi'' OF TflE TEFlRITORES

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PLATE XVI.

Fig. 1. — Trioni/i srutamantiqum. Type, oue-fourth natural size. Page IIG.
Fig. 2. — Extremities of right byo ami hypo-sternal bones of the same speoimeu.
Fig. 3. — Trianyx helerofjlyptM Cope. Type, one-fourth natural size. Page 120.

Figs. 3-6. — Trimiyx concfniricus Cope. Costal bones, natural size. Page 120. The restoration in this
figure is erroneous, as the costal bones should be more mimerons.

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Figs. 1,'i. — liaeiiaarenosa heidy. Plastron iind carapace. Page 148.

Figs. ■iS.—llaeiia jmiiderom Cope. Carapace, three-fifths natural size: :!, part of margin; 3a, from

within. Page lot).
Fig. 4. — Marginal bone ; a, its edge.

Fig. 5. — Anterior marginals; a, sutural edge of posterior.
Fig. 6. — Ingiiinal or asillnry marginal.

Fig. 7. — Common suture of two costals and a marginal at septum.
Fig. 9. — Distal end of a costal.

Figs. 9-13.— £'mi/« seplariim Cope. One-fourth natural size ; 9, plastron from above. Page 139.
Fig. 10. — Anterior part of margin of carapace, with part of internal septum.
Fig. 11. — Internal septum of one end of carapace.
Fig. 12. — Portion of carapace, with vertebral scutum.
Fig. 13. — Costal bones of carapace.

U S GEOLOGICAL. SUFA^Y Or' THE TERRITORIES

PL-A,TE XVI!

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PLATE XVIII.

Fragments of shells of tortoises, natural size.

g. 1. — Plastomenus trionychoides. Costal bone, above ; a, edge. Page 123.

g. 2. — Plaslomemw viuUiforeatiit. Costal bone, above. Page 124.

g. 3-C. — Bones of one individual of I'lagtommus muUifoveatus. Page 124.

gs. 3,4. — Boues of plastron.

g. C. — A vertebral boue, from above ; a, from below.

gs. 7,8. — Bones of a third individual of P. muUifoveatug, from the plastron. Page 124.

gs. 9-14. — Bones of one individual of P. molopinus ; a, inferior, and ft, marginal views. Page 125.

gs. 9-13. — Median costal bones.

g. 14. — Proximal angle of last costal bone.

gs. 10-17. — Fragments of carapace of Plastumenus ailemiua; o, inferior views. Page 126.

gs. 15, 16. — Lateral costals.

17. — Last costal, entire, showing absence of vertebral or pygal bones,
gs. 18, 19. — Marginal bones of Anostira raduHna; a, edge views. Page 128.
g. 18. — Anterior marginal,
g. 19. — Posterior marginal.

gs. 20-22. — Bones of carapace of Kmys })ohjc>jphu8 ; a, side views. Page 131.
gs. 20, 21. — Vertebral boues.

g. 22. — A marginal bone, showing pit for gomphosis.
gs. 23-25. — Carapace and plastron of ICmys lerreslria. Page 131.
g. 23. — Vertebral bone; o, edge view.

g. 24.— Clavicular (or episternal) bone, from above; a, from below.
g. 25. — Costal bone; u, Ironi below ; b, edge,
gs. 215-33. — Bones of liniye viegaulax. Page 132.
gs. 26-28. — Vertebral bones,
gs. 29-31. — Marginal boues; a, edges.
gs. 32, 33. — Bones of a second individual,
g. 32. — Vertebral bone,
g. 33. — Costal bone ; o, edge view.

gs. 34-42. — Bones of Emys eullmetu), found together. Page 133.
gs. 34-36. — Vertebral bones,
gs. 37-40. — Marginal bones; a, edges.

g. 41. — Clavicular or episternal bone, from below ; a, from above.
g. 42. — Part of postabdominal.

U S^GEOLOGICAL SURVEY OF THE TERRITORIES-

PLATE X\TIL

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1-17. PL.ASTOMENUS, 18-19 ANOSTIRA. 20-42 ENr^^S .

PLATE XIX.

Fig. 1. — Baena liebraica Cojte. Between oue-fourth antl one-third natural size, from above; posterior

part restored. Page 146.
Fig. 2. — Tlio same from below, not restored.

Fig. 3. — Bacna undata Leidy. Part of carapace, one-third natural size. Page 147.
Fig. 4. — Anterior extremity of plastron of the same specimen.
Fig. 5. — Posterior extremity of the same plastron.

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PLATE XX.

Hadrianus octoimrius Cope. Tjpe specimen, oue-fifth natural size. From Black's Fork of Green River,

Wyoming. Page 140.
Fig. 3. — Anterior, and Fig. 4, posterior views.

LT S GEOLOGIC^ S'JR'.^EY OF THE TEP-RITORIES

PL.^TE x>:

T Sinclair & Son.Iith Philada

HADKIANUS OCTONARIUS. C(

PLATE XXI.

I''ig8. 1-3. — Skull aud vertebras of a specimen of Crocodilus affiiiie. From Smith's Fork of Green Eiver,

Wyoming. Tliree-eighths natural size. Page 162.
Fig. 1, la. — Skull from above aud from tlie side.
Fig. 2. — Lumbar vertebra from front; a, from below.
Fig. :i. — Another lumbar from below.
Figs. 4-8.— Portions of skull and vertebrae of Crocodilus clavis. The typical specimen from 'the Washakie

basin. Page 157.
Fig. 4,— Parts of right maxillary and premaxillary boues from below.
Fig. 5. — Part of right mau<libnlar ramus from above.
Fig. (). — Cervical vertebra; a, from below; 6, from front.
Fig. 7. — Anterior view of a dorsal vertebra.
Fig. 8. — Another dorsal; a; from below; b, from behind.
Fig. 9. — Pelvis of second Crocodilus claris, tigured in the next idate, right side. Page 157.

£ GEOLOGICAL SLIRX/F':' OF THE TI^.R-IT'^R

T SiTiciair & Son.,T.ith Philada

1-3 CROCODILUS AFFINIS. 4-9. C CLAVIS , Vs

PLATE XXII.

Cranium aud boues of Crocodilus vlavia Cope. Second specimen ; one-eigUth natural size except Fig. 7,

which is one-half n^itnral size. Page 157.
Figs. 1,2. — Skull from above aud below.
Fig. 3. — Cervical vertebra from below ; n, from behind.
Fig. 4a. — Posterior extremity of a dorsal vertebra.
Fig. 5. — Lumbar vertebra, from below ^ a, from behiud.
Fig. 6. — Dermal bone.
Figi 7. — Tootb, Tintnral size.

(T S GFOLDGIGAL, SUEtVEV OF THE TERR[TOTxIE£

PLATE ;<XI1

T Smclaji &. Son Lith Phiiada

PLATE XXIII.

Figs. 1,^. — CrocodUua acer. From near Manti, Utah. Page 154.

Fig. 1. — Cranium, nearly one-balf natural size, from above ; o, left side ; b, posterior view.

Fig. 2. — Fourth maxillary tooth of right side, natural size; a, section of crown, one-fourth way above
base.

Figs. 3-8. — Emys ^haityhnmniaua. Type from Cottonwood Creek, near Fort Bridger, Wyoming, three-
eighths natural size. Page 135.

Fig. 3. — Portion of carapace, fmm above.

Fig. 4. — Last three vertebral bones, edge view.

Fig. 5. — l-'irst costal of right side, below.

Fig. 6. — Ninth marginal bone of right side, anterior edge

Fig. 7. — Eighth marginal bone of left side, anterior edge.

Fig. 8. — Eutosternal bone, from below.

Figs. 9-11. — Emys tvyoviingensis. Three-eighths natural size. From near Fort Bridger, Wyoming.
Pago 135.

Fig. 9. — Fifth vertebral bone, from above ; a, border, showing thickness.

Fig. 10. — First costal bone of right side, from below.

Fig. 11. — A posterior marginal view of edge.

Figs. I'J, 13. — Emys tcstudinea. One-half natural size. From Bear River, Wyoming. Page 134.

Fig. li. — Entosterual bone, from below.

Fig. 13. — Left border of posterior lobe of plastron, from above.

Figs. 14-lU. — Notomorj>ha ijravis. From Bear River, Wyoming. One-half natural size. Page 143,

Fig. 14. — Supposed left anterior lobe of plastron.

Fig. 15. — Right eighth marginal bone, posterior edge.

Fig. IG. — Left seventh marginal bone, posterior edge.

Figs. 17, 18. — Proiatjras lacuntris Cope. Vertebrie, one-half larger than nature. From Cottonwood
Creek, Wyoming. Pago 103.

Fig. 17. — Lateral view; a, inferior; b, anterior; and c, posterior views.

Fig. 18. — Anterior view of neural arch of another vertebra, displaying aygosiihene.

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PLATE XXIII a.

Fig. 2-4. — Right side of temporal and occipital region witli atlas and axis of the specimen of Byrachyua

fxijiiJKS, figured in pUite LIV; one-third nature.
Fig. 1. — CrocodiUis pohjodon Cops. Dist.il portion of dentary bouc, natural size. Page 154.
Fig. 2. — Mandible in profile one-third natural size; 2, the angular and articular regions; 'ia, tho

dentary.
Figs. 5-9. — Crocodilim aubiilalus Cope; natural size. 4. Part of dentary bone. Page 152.
Fig. 5. — Fragment of premaxillary.

Fig. r>. — Cervical vertebra (third); 7a, jiroOle ; 7b, anterior extremity.
Fig. 7. — Anterior articular extremity of a dorsal vertebra.
Fig. 8. — Fragment of tooth, probably anterior premaxillary ; 9 a, section.
Fig. 9. — Articular region of the same, .6 natural size.
Figs. 10-18. — Crocodilualictcrodoii. 11-13, type from near Black Butte; 14-18, from near Laclede ; 19-23,

Upper Green River; 11, 12, .6 natural size; 12a and 14, twice natural size; remainder, natural size.

Page 164.
Fig. 10. — Cranium, from above; fig. 11, same skull, the muzzle from below.
Fig. 11(1. — Premaxillary teeth.
Fig. 12. — Basisphenoid bone, natural size.
Fig. 14. — Portion of right maxillary.
Fig. 15. — Posterior lumbar vertebra.
Fig. 16. — First caudal vertebra; a, from above.
Fig. 17. — Femur of same.

Figs. 18-22. — Dermal scuta of another specimen.
Fig. 23. — Tooth of Crocodilui sulci/eriia Cope. Page 157.

U S GEOLOGICAL SURVEY OF THE TERRITORIES,

■LATE xx;:: a

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10-17 CROCODIJ_iUS HETERODOTSr

PLATE XXIII 6.

Species of Champdosaiinis, fmiu tlif Pueico beds of Nt;w Mexico, uatnral size.

Fig. 1-4. — CliampKOHtmrux iiiiKlialia. Four tlorsal vertebrae not knowu to be consecutive, found ue.ar

Canyon Larjjo uiiugled in tlie same matrix witli bones of Perijitj/clius rhahdodon. Figs, a, inferior;

b, anterior; c, iiosterior ; and d, superior views of the centra whose number they bear. Page 107.
Figs. 5-10. — Vertebrie of Champsosatirua puerceyisis, from the Upi)er Pnerco River near the Nacimieuto

Mountain. Figs, ."i, 6, and 10, dorsals; 7, 8, and 9, eaudals. Figs, a, inferior; 6, anterior, and c,

posterior views of the vertebra numbered. Page 107.
Figs. 11-22. — Champsoaaurns saponensit. Page 109
Fig. 11. — Odontoid bone, lateral view. In all the figures of verttbrje a, represents the inferior; ft, the

anterior ; c, the posterior, and d, the superior faces.
Fig. 18. — A detached diapophysis, with part of the neural arch, from a dorsal vertebra, end view ; a, side

view.
Fig. 19. — Neural spine with postzyg.apophysis from right side ; a, from behind.
Fig. 20. — Cervical, and fig. 21, dorsal ribs, proximal portion, lateral view; a, proximal end.
Fig. 22. — Part of a rib ; a, proximal fractured end.

us GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE XXIII b

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r^m

T SmcUit iSon, L-ilh Phila-

4 CHAMPSOSAURUS AU3TRALIS 5-lO.CPUERCENSIS 11-22. C, SAPONENSIS

i

PLATE XXIIIc.

The figures represent parts of Mammalia from the Puerco Eocene, of the natural size.

Figs. 1-'). — Catopsalis polliix. Page 734.

Fig. 1 — Riglit inaiidilmlar niiiius lacking the po.sterior parts, and with the anterior extremity of the

first true molar brolien oft'; external view ; a, internal view ; b, superior view ; c, inferior view.
Fig. 2. — Proximal caudal vertebra, left side ; «, anterior view.
Fig. 3. — Distal part of humerus, posterior side ; «, anterior side.
Fig. 4. — Ulna, inner side ; a, superior view.
Fig. 5. — Right astragalus, superior view ; a, external view.
Fig. 0. — Polymaslodoii taoeiiais. Superior view of last two molars. Page 732. This may represent the

maxillary dentition of Catopsalis jyoUiix.
Figs. 7-12. — Hemigaviis viilUiomm. Separate teeth of two individuals, represented resjiectively by figs.

7-10 and 11-12.
Fig. 7.— Superior molar, lateral view ; a, externiil ; 6, inferior views.
Fig. 8. — 1 Superior incisor, lateral view.

Fig. 9. — Inferior incisor, anterior view; a, inner side ; b, exterior side.
Fig. 10. — Middle inferior incisor, lateral view; a, anterior view.
Fig. 11. — Inferior molar of No. 2 side ; a, crown from below.
Fig. 12. — Inferior molar of same, with a, lateral views ; b, superior view.

As these specimens were received too late to permit their description in the text of this work, I
discribe them here. The original description appeared in the American Naturalist, 1862, p. 831.

Char, jen.— This genus is probably a Tteniodont, and allied to Calamodon, but the absence of the
canine teeth renders the determination incomplete. The incisors, while of the form of those of Cala-
modon, had a limited period of growth, and the root displays a contracted base. The enamel also
extends but a short distance on the anterior face of the tooth. The probable first inferior incisors are
quite small, but are generally like the second or large ones. The superior molars have but a single
conic root, but in some of them a fissure of the external side marks the usual place of division. The
crowns are narrow and transverse to the axis of the jaw.

Char, specif. — Large incisors strongly curved, robust, wearing with a strong posterior shoulder.
Shaft with the dentine finely and sharply ridged. Inferior apex compressed ; front regularly rounded.
Enamel ? ridged or smooth. Superior molars with narrowed transverse crowns, and roots covered with
a thin layer of ceuientum. There are one, perhaps two external cusps, but the crowns are all much
worn. One crown, jterliaps inferior, is sub-roun<l with a notch, as in Calamodon sp. Enamel short,
with equal base, smooth. Length of first incisor, .026; diameter of crown, anteroposterior, .008;
transverse, .014. Length of second incisor, .094; diameters of crown, anteroposterior, .029; tr.ansverse,
.019. Length superior molar, .0225; diameters crown, anteroposterior, .010; transverse, .017. Diam-
eter inferior molar (second specimen), anteroposterior, .011 ; transverse, .011. Discovered by D. Bald-
win in New Mexico. The species is a little larger than the Psittacotheriiim multi/ragum. — £. JJ. Cope.

li S GEOLOGICAL SURVEY OF THE TERRITORIES.

PI ATE XXIII c

1 ■;. I'.ATOPSALIS HuliliLOC 6 PObYMASTOljON TAOENflS ',-12 HKMinANUS VTl.TUOSUS

PLATE XXIIIrf.

Figures all uatiiral size except 1 h, which is three halves natural size.

Fig. 1. — PtUodus mediwvus. Eight mandibular ramus, external side; a, internal side; 6, from above.

Page 173.
Fig. 2. — Catopsalis J'oliatus. Right mandibular ramus, right side; a, internal side ; 6, superior, and 0,

posterior views.
Fig. 3. — Hyopsoclus pou'ellianus. Part of right mandible, external view ; a, inner side. Page 23.5.
Fig. 4. — Hijopsodus pou-dlianus. Part of left ramus, external side. Page 235.
Figs. 5-6. — Sijopsodus acolylus. 5, external view of posterior parts of maxillary and mandibular bones;

6, part of right ramus mandibuli, with true molar teeth, inner side ; a, external side; b, superior

view. Page 238.
Figs. 7-8. — Chriacus pelvidens. Fig. 7, posterior, four superior molars of right side ; fig. 8, left mandib-
ular ramus of another individual, external view.
Figs. 9-10. — Triisodon conidens. Page 274.
Fig. 9. — Last five superior molars of right side from below ; tig 10, right mandibular ramus of the same

individual from above.
Fig. 11. — Part of right mandible of Triisodon heilprinianus, supporting second true molar tooth ; a, the

same from above. Page 273.
Fig. 12. — Deltatherinm halduini. Part of right mandibular ramus, external view ; a, innerside. Page 282.
Fig. 13. — Deltatherium interriijttum. Part of mandibular ramus supporting three premolars and one

true molar, external side. Page 262.
Figs. 14-15. — Periptychus carinidens. Fig. 14, right maxillary bone with teeth from below; fig. 15, left

ramus of the mandible with teeth from above. Page 313.
Figs. U)-20. — Parrtohates brachystomiis. Page 721.
Fig. 16. — Left maxillary bone with last four molars from below.
Fig. 17. — Left ramus mandibuli, external side ; a, from above.
Fig. 18. — Lumbar vertebra; «, from below.
Fig. 19. — Left femur from front; a, from behind.
Fig. 20. — Distal extremity of tibia and fibula with tarsus and proximal part of metatarsus, external

hide ; a, from front and outside ; b, posterior view ; c, inner side.

U.S. GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE XX'IIU

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1 PTILODU-^ MEDIAEVUS 2 CATOPSALIS FOLIATUS .3-4.HYOPSODUS POWELLIANUS . 5-6 H.ACOLYTUS,
7-8 PELYCODUS PELVIDENS 9-lO.TRiiSODON CONIDENS . ILTRIISODON HEILPRINIANUS .
12 DELTATHERIUM BALDWINI 13. D.INTERRUPTUM. 14-15 PERIPTYCHUS CARINIDENS

16-21 PANT OLE STES BRACHYSTOMUS .

PLATE XXIIIe.

Mammalia from the Puerco Eocene, uatiinil size.

Figs. 1-5. — Conoryctes comtna. Natural size ; one individual. Page 198.

Fig. 1. — Eight facial regiou lacking muzzle.

Fig. 2. — Right mandible, external size.

Fig. 3. — Right humerus, proximal two-thirds.

Fig. 4. — Distal end of tibia from behind ; a, distal extremity.

Fig. 5. — Proximal extremity of radius from below ; a, proximal view.

Fig. 6. — Conorycte* crassicuspis. (C. crassideus on jdate, by error.) Part of left ramus from above, nat-
ural size. Page 201.

Fig. 7. — Taniolabis scalper. Typical specimen, cutting tooth, external side; a, iuterual side; I, cutting
extremity ; c, section of root. Page 193.

Figs. 8-11. — Deltalhcrium fundaminia. Parts of one individual, natural size. Page 278.

Fig. 8. — Cranium, right side ; a, palate from below ; b, top of skull a little distorted.

Fig. 9. — Inferior true molars from above.

Fig. 10. — Inferior canine tooth, internal side; a, external side.

Fig. 11. — Left ulna, internal side, both extremities broken off.

Fig. 12-13. —Vidymictis haydimanus. Two individuals, natural size. Page 306.

Fig. 12. — Left maxillary bone with two premolars and two molars.

Kig. 13. — Left mandibular ramus, internal view ; a, from above.

US GEOLOGICAL SURVEY OF THE TERRITORIES,

PLATE XXIIl 8

T. Smciaiv SiSon, Litr. PKiie.

5.CONORYCTES COMMA . 6 .C CRASSIDENS . Y.TAENIOLABIS SCALPER.
8-11 DELTATHERIUM FUNDAJ/HTSTIS 12-1? ^^^^~:" ^— ^t^IS HAVTDENL

PLATE XXIII/.

Bones of two individuals of Periptychus rhabdodon, from the Pnerco formation of New Mexico, natural
size. All belong to one individual excepting figs. 4, 5, 6, and 7, which belong to a second and
rather larger one than the t'oimer. The accompanying jaws and teeth are not figured. Page 391.

Fig. 1. — Superior view of cast of roof of brain case.

Figs. 2-7. — Cervical vertebrae, one, the third or fourth, missing ; views of the right side ; o, inferior
views; b, anterior views.

Figs. 8-9.— Caudal vertebrie, right side; a, below; b, posterior view; o, left side of No. 9.

Fig. 10. — Proximal part of scapula, interior view ; a, glenoid cavity.

Fig. 11. — Right humerus, the front ; a, posterior side ; b, proximal ; c, distal extremities.

Fig. 12. — Left ulna, interior view; a, exterior view; b, superior view.

Fig. 13. — Head of radius, proximal view.

US GEOLOGICAL SURVEY OF THE TERRITOFQES

PLATE iCXIIl f

T SinclaiT ifcoo-n, LitK PKala.

PERIPTYCHUS RHABDODON COPE-r.

PLATE XXIII^.

Bones of Periptychus rhabdodon (except Fig. 12). Natural size. They belong to three individuals, those
represented on the preceding plate (Nos. 1 and 2), and a third, which I call No. 3. Figs, i and 4
belong to No. 2, and Fig. 2 belongs to No. 3; the remaining figures belong to No. 1. Page 391.

Fig. 1. — Scapula, external view.

Fig. 2. — Bones of foot; metapodiala and phalanges.

Fig. 3. — Right femur from front; a, from behind; b, proximal view.

Fig. 4. — Tibia lacking epiphysis and inferior extremity.

Fig. 5. — Left calcaueum, internal view ; a, external ; b, anterior views.

Fig. 6. — Left astragalus, internal view; a, external; 6, anterior; c, superior; and d, inferior views.

Fig. 7. — Cuboid bone, .anterior view; a, internal view.

Fig. 8. — Navicular, from below.

Fig. 9. — Posterior metapodium without hallux; a, internal view.

Fig. 10. — Phalanges from front.

Fig. 11. — Phalanges with part of unguis from below; a, edge view.

Fig. 12. — Right mandible of Periptj/chus ditrigonus external view ; a, superior view. Page 404.

U S GEOLOGICAL.SURVEy-'OF THE TERRITORIES

PLATE ;<XII1 I

T Sinclair & Son, Liili PKiU-

1-n PERIPTVCHUS RHABDODON Vz HDITRlouNUS

PLATE XXIV.

Kg. 1. — Plesiarctomyt Uptodua Cope. Portion of mandibular ramus, natural size, from the inner side;

1 a, from above. Page 183.
Fig. 2. — I'lemurctomya. Ramus of mandible twice natural size.
Figs. 3-5. — Plegiarctomyg hians Cope, natural size; 3, cranium from below; 4, end of mandilmlar ramus

from the outer side ; 5, ca.st of brain, upper side.
Figs. 6-7. — f^typolophus acuhatnn Cope, inferior molars, natural size, lacking heels; 6, posterior view

6 6, exterior do. ; 7, a premolar. Page 299.
Fig. i.-Stypolophtt) pungens Cope. Part of mandibnlar ramus, internal view; 18 a, superior view.

Page 290.
Fig. 9. — Stypolophus brevicalcaratus Cope. From the outer side; a, from within; b, from above; all nat-
ural size. Page 291.
Fig. 10. — Stypolophus inseclivorut Cope. Twice natural size; inferior molar ; from the outer side; la,

the sauK^ from inside; Fig. 11, premolar. Page 291.
Fig. 12. — iliacia parvhorus Cope. Portion of mandible, natural size; a, same from inner side: 17 b, the

same from above, twice natural size. Page 304.
Figs. 13-17. — Pantolmtes longicaudiis Cope. Natural size. Page 725.
Fig. 13. — Left ramus of the mandible from the outer side ; 1 a, the same from above.
Fig. 14. — Metapodial bone from above ; 2 a, from below.
Fig. 15. — Metapodial bone from above; 3 a, from below.
Fig. 16. — Distal caudal vertebra; 4 a, the same from end.
Fig. 17. — End of another caudal.
Fig. 18. — Sarcolemur pygmwua Cope. Right mandibular ramus, 1.5 natural size; 16 a, from above; 186,

from within. Page 233.
Fig. 19. — Sarcohmur pygmceus Cope. Portion of left mandibular ramus, 1.5 natural size; 19 a, from

above.
Fig. 20. — HyoptoduH vicarius Cope, nat. size. Fig. 21, portion of mandibular ramus, twice natural size;

11a, from above Page 237.
Fig. 22. — Lambdolherium procyoni nnm Cope. Posterior superior molar, twice natural size ; 22 a, same from

the front. Page 711.
Fig. 23. — Part of mandibular ramus of Hyravotherium oebornianvm; from the outer side, natural size;

23 a, the same from above. Page 647.
Figs. 24-5. — UyracotUerium vamiacieniie Cope. Molars from different animals; 1.5 natural size. Page 634.
Fig. 2G. — Part of mandibular ramus ut Pliotophua cifio(M« Cope, from the outside, natural size; 26 a, the

same from above. Page 625.

H R GEOI.nrJiCAl. SUR/r-' OF T^W. TERRITORIKS

PLATE yr/ryj

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1-S PLESIARCTOMYS 6-11 STYPOLOPHUS. 12 MIACTS. 13-17 PANTOLESTES .
18-19 SARCO LEMUR. 20-21 HYOPSODUS. 22-25 HYRACOTHERIUM. 26 OLIGOTOMUS .

PLATE XXI Y a.

Figs. 1-10. — Plesiarctomys deUcalissimiifi. Specimens 5 and 6, natural size. Page 182.

Fig. 1. — Cranium of No. (i, laterosuperior view ; a, lateroinferiorview, showing all of the alna and radios
uot present on the block represented in fig. 4.

Fig. 2. — Cranium of specimen 5 from behind, showing also the adherent scapula and its coracoid and
acromion processes, and two metacarpals ; a, the same from below, showing the adherent proximal
parts of the humerus and scapula, with acromion especially displayed, and two metacarpals.

Fig. 3. — A lumbar vertebra belonging to Nos. 5 or 6, found associated with others, and with the speci-
mens No8. 6, 7, 8, 9. These belong to either specimens 5 or 6.

Fig. 4. — Humerus and parts of ulna and radius of No. 6.

Fig. 5. — Pelvis of No. (5, external view ; a, from above.

Fig. 6.— Proximal end of femur. (Erroneously marked No. 10 on plate.)

Fig. 7. — Distal end of femur.

Fig. 8. — Distal end of tibia, anterior view; o, inferior view.

Fig. 9. — Astragalus of No. 6, from above.

Fig. 10. — Metatarsal of No. 0, from front ; a, from side.

Figs. ll-l'.i.—I'lesiarctomi/s delicalior. Part of a leg found associated with lower jaws and other bones.
Page 18-2.

Fig. 11. — Distal extremity of tibia.

Fig. 12. — Astragalus from above ; a, from external side ; b, distal end.

Fig. 13. — Calcaneuni from above ; a, external view ; ft, distal view.

Fig. 14.— Part of right mandibular ramus of Plesiarcioniys iMCca(u», external view, natural size ; a, the
same from above, one-half larger than nature. Page 179.

Fig. l^ili't.— Teeth of Calamod&n cijUndrifer. Type specimen ; natural size. Page 192.

Fig. 1.5.— Molar tooth from side ; b, from opposite side ; a, lateral view ; c, grinding surface.

Fig. 16. — Part of incisor tooth.

Figs. 17-21. — Jaw and t«eth of Esthonyx acutidens. Natural size. Page 210.

Fig. 17. — Maxillary bone and teeth lacking one or two true molars, from below; a, lateral view.

Fig. 18. — A more posterior molar Ijroken through the middle, from below.

Figs. 19-21. — Molars of a second individual, natural size.

Fig. 19. — A superior molar somewhat weathered, from below.

Fig. 20. — Last inferior mol.-vr exterior view ; a, from above.

Fig. 21. — Inferior T penultimate molar, external view ; a, from above.

Figs. 22-25. — Eellionyx spatiilarius. Teeth, natural size. Page 211.

Fig. 22. — Last inferior molar, external view ; a, from above.

Figs 23,24. — Premolars, inner side.

Fig. 2o. — t Canine inner view; a, external view.

Fig. 26. — Micronyopa scottianua. Left mandibular ramus, external view, natural size; a, from above.
Page 217. *

n S GEOLOGICAL SURVETi" OF THE TERRJTC'RIE.r

PI^TE :OU:/a

.1-14.PLESL«lRCT0MYS. 15-16.CALAM0I)0N.17-25.ESTH0NYX.26 MICROSYOPS.

PLATE XXIV6.

Vig. 1. Calamodou simplex. Left mandibular ramus, two-tliirds natural size. From the Wasatch of the
Big Horn Basin, Wyoming, J. L. Wortmau; o, do. superior view; J, anterior view of symphysis .
Alveolar wall of incisors absent. Page 189.

Fig. 2. — I'sittacotherium multifragum. Pnercobeds, N. W. New Mexico, D. Baldwin. Mandible, natnra
size, from right side. 2a, the same from above; b. symphysis, from front. Page 196.

Fig. 3. — Psiltacotiicrium aspasice. Type; fragment of left mandibular ramns, natural size. Page 19b.

Fig. 3(1. — Tlic .same from above.

Fig. 4. — I', anpasiw. Part of left ramus of an adult, inner side. New Mexico. D.Baldwin. Page 196.

5 GEOLOGICAL SURX/E^' OF THE TERRITORIES.

FKATE "■■'■'IV 1

T SiiacSaiT i: Sor. Lilh

1 CAUAMODON SIMPLEX %. 2 PSITTACOTHERIUM MULTIFRA.G UM '-^ 3-4 P ASPASIAE W.

PLATE XXIVc.

Figs. I, 2.— Jaws of a specimen oi Esihonyx biirmeisteri. From the Big lloni Basin ofWyoming; natural

size, external view. Page 204.
Fig. la. — Inferior view of ujiper jaw.
Fig. 2a. — Superior view of lower jaw.

Figs. 3-10.— Bones of a secoiul specimen of the same species from the .same region, natural size.
Fig. 3. — Atlas, from ahove.

Fig. 4. — Axis, left side ; a, from below ; /), anterior ; c, posterior view.
Fig. 5. — Centrum of a dorsal vertebra, posterior view ; a. from below.
Fig. ('. — Lumbar centrum, posterior view ; a, from below.
Fig. 7. — Caudal vertebra.

Fig. 8. — Proximal part of uianus, superior view ; a, proximal; b, distal views.
Fig. 9. — Ra'lius or fibula, external view; a, internal view.

Fig. 10. — Pelvis lacking puliis and distal part of ischium ; anterior inner edge ; a, external face.
Fig. 11.— Superior maxillary and teethoi' Oxyaenafordpala. From the BigHoin, Wyoming; natural size

n, inferior view. Page 318.
Figs. 1-2-1;'). — Bones of a second Oxydena forcijHita from the same region, natural size; other parts fig-

ured on Plate XXIV rf. Page 318.
Fig. 12. — Distal part of humerus, anterior view ; a, distal virw of the same.
Fig. 13. — Radius, proximal extn-ujity.
Fig, 14. — Ischium without distal extremity.
Fig. 1."). — Radius, distal extremity.
Fig. It). — Ulna, distal extremity.

U 3. GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE XXIVc.

T omclair SlSoti, LilK PKila..

1-10 ESTHONYX BURMEISTERI . U-14. OXYAENA FORCIPATA

PLATE XXIVrf.

Bones of Cretxloiita, uaturul size.

Figs. 1-18. — Oiyaenaforciputu. P.irts of the skeleton jnirtly figured on Plate XXIVc. Page 318.

Figs. 1,2. — Caudal vertebra' ; 1, the more anterior; a, anterior articnlar faces.

Fig. 3. — Cuneiform hone of h'ft caijms from above ; u, from below.

Figs. 4-7. — Proximal extremities of carpal bones.

Fig. f . — Tibia, external side of head, somewhat distorted.

Figs. "J-ll. — Tarsus, less the cuneiform bones, from above; a, from below; h, from the external side;
c, internal side; rf, distal extremity of astragalus and calcaneiim.

Fig. lU. — Cuboid bone; rf, distal extremity.

Fig. 11. — Navicular bone ; 0, distal extremity.

Figs. 12-17.— Metapodial bones; a and 6, lateral views of the proximal extremity; c, iimximal ex-
tremity.

Fig. 12. — First metacarpal.

Figs. 15,10. — Third and fourth metatarsals.

Fig. 17. — Fifth metatarsal.

Fig. 18. — Ungual phalange, lateral view; a, superior; b, inferior; c, proximal views.

Figs. 19-22. — Sunuthraustes antiqnus. Fragments of skeleton from the Puerco of New Mexico. Page 347.

Fig. 19.— Posterior i)art of left maxillary bone supporting i)enultimate molar, with bas<^ of last molar,
with part of molar bone.

Fig. 20. — Kight squamosal bone, with glenoid cavity and meatus auditorius. lateral view.

Fig. 21. — Part of left mandibular ramus, posterior part supplied from opposite side; a, superior view.

Fig. 22. — Humerus, minus head and condyles.

S GEOLOGICAL SURVEY OF THE TERmTORIES

PLATE XXIVd

TSirvclaii &^oon, Lith.Phi

-18.0XYAENA FORCIPATA. 19-22. SARCOTHRAUSTES ANTiQUUS.

PLATE X X I V e .

Fig. 1. — Cranium of Anaptomorphits homi(nculus. From above, uatural size ; «, the same from lielo\v, one-
half hirger than natnre; h, tlic same, h'ft side, natuia; si^e. Pa^e 'iVJ.
Fig. 2. — CijnodoHtomya lalidcns. Left maii<liliular ramus, uatural size; o, both rami from below.

Page 24A.
Fig. 3. — Chriacus pehidens. Natural size, left inferior dental series, from above. Page 225.
Fig. 4.— C/iHa«;« angulatus. Right nianflible, natural size; a, inner side; b, superior view, one-half

larger than nature. Page 2:U.
Fig. 5. — Pantohitcs chacoisis. Right mandibular ramus, inner side; a, superior view of the same, from

the Cig Horn Basin. P.age 71<).
Fig. 0. — 1'aiitotentcn metniaciis. Left ujandibular ramus, inner .side; a, superior view. P.age T24.
Fig. 7,—J'anlulesli's iiuptiia. Fragment of right mandibular ramus, internal view ; n, superior view of

the same, one-half larger than nature. Pag<! 72it.
Fig. H.—Ui/opgodiis lemohnanu8. Right mandibular ramus, natural size, external view. Page 23U.
Fig. 9. — //. htnoimuuiiK. Left mandibular ramus, internal vicAv, natural size; a, the same from above.

Page 236.
Fig. 10. — Didjjmictis cm-lideiis. Left mandible, natural size, external view ; a, superior Ti( w. Page 313
Fig. n. — DidymictU masseteiiciw. Left mandibular ramus, natural size, external side ; «, internal side :

b, from above. Page 312.
Fig. 12. — Miacis brevirostris. Left mandibular ramus. From the Big Horn Basin ; uatural size, external

side ; a, internal side ; b, from above. Page 303.
Fig. 13. — Uiddphodm ahsamkne. Anterior part of cranium with teeth, from below, natural size; a,

mandible, with both rami, from left side. Page 2d4.
Figs. 14-19. — Parts of one skeleton of Mesonyx ossifragus. From the Big Horn Basin, natural size.

Page 362.
Fig. 14. — Axis without arch, right si<U-.
Fig. 1"). — Metacarpal; lateral, n, ])roximal views.
Fig. 10. — Distal end of metapodial, from the front.
Fig. 17. — Proximal ph.alange, from above ; «, proximal end.
Figs. 18,19. — Ungual phalanges; a, above; b, below; c, proximal ends.
Figs. 20-22.— Teeth cf supposed young of Calamodon ainqyJex. From the Big Horn.
Fig. 20.— Canine tooth, external view.
Figs. 21,02. — Molar teetli, lateral and superior views; a, superior view.

us GEOLOGICAL SUR'vTY OF THE TERRITORIES

PLATE XXIVe

?&9^^,..'^ , M

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..J'

^iSmfi'^Af,

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1 ANAPTOMORPHUS.2 CYl\(OD0NTOtTY3.3-4.PELYCODUS 5-7 PANTOLE STE S ^ 8-9.HYOPS ODUS
10-11 DIDYMICTIS.ia MIAGIS. 13. DIDELiPHODUS. 14-19. MESONYX 20-22 CALAMODON

PLATE XXIV/.

Fig. 1. — iltxodecte^ pungens. Right mandibular ramus, exterual vii'w, natural size; a, internal view; 5,

superior view. Page 241.
rig. i. — Mixodectes craasiusailns. Left mandibular ramus, internal view, natural sizi-; u, from above.

Pago 242.
Fig. 3. — Tru8odon levimnuii. Right mandibular ramus, external size; exterual view; (i.'iroMi above.

Page 2/3.
Fig. 4. — MioclaenuK suVtrigotiuH. Right maxillary and left mandibular bones, natural size ; fig. 4 maxillary

bone from l)elow; h, ranms, external view; h, do. internal view; c, do., superior view. Page 33'i.
Fig. 5. — MioclaenuK corrugatua. Right maxillary bone, with lastfuur nuilar teeth from below; a, from

exterual side. Page 341.
Fig. G-14. — Mioclaenus ftrox. Typical individual (No. 1); natural size. Page 328.
Fig. 6. — Superior true molars, the second restored, from below.
Fig. 7. — Superior caniue; lateral, o, posterior view.
Fig. 8. — Last two inferior molars from above.

Fig. 9. — Nenral areh of a lumbar vertebra, from biOiind; a, from left side.
Fig. 10. — Prezyga])0physe8 <if a dorsal vertebra from fnuit, and a, from above.
Fig. 11. — Distal end of radius or fibula, natural size, with o, side views; a and d, edge views.
Fig. 12. — Four metacaq)al8, front and proxim.al views of all ; lateral and distal views of the second (6).
Fig. 13. — Tibia from front; «, from outer side.

Fig. 14. — Astragalus from above; a, internal side; b. external side; c, inferior side.
Fig. 15. — Secfuiil superior molar of a second specimen of MiocJnnus ferox (No. 4) uatural size, from

below. Page 328.

us GEOLOGICAL SUR'vTY OF THE TERRITORIES

PLATE X>av f

-^k^Vk^

T. biticlairStSon, LiiK-Pluia.

MIXODECTES PUNGENS 2 M GRASSIUSCUbUr
4 MIOCLAEINUS sijBTRlGONUS b.MCORRn:.

PLATE XXIV^.

Fig. 1. — Plioplarchus whiiei ; type from Dakota; leftside. Page 728.

Fig. 2. — Uelagras prinfiformis. Two dorsal vertebra) from the Piierco group, New Mexico, from left side;
a, from below ; h, from front; c, from above. Page 731.

Fig. 3—1. — Dinnacusl navajovius. Palate, from below ; tig. 4, glenoid cavity, from below. Fig.9. 11-13 are
part of the samo skeleton. Page 741.

Fig. 5. — I'eriplychus carimdens. Last two inferior molars, inner side, with third or fiuirth premolar; a,
the same, from above. Page 403.

Pig. 6. — Anisoiichua coniferus. Maxillary bone, from l>elow ; a, mandible of same individual from above ;
6, maxillary of a second individual, including third and fourth premolar and first and second true
molar.s, from below ; o, the same, external side. Page 409.

Fig. 7. — riienacodux raJaolatun. Last two superior molars; a, a iiremolar, and the last inferior true molar
of the s.ame individual, internal side; b, the same, from above. Page 487.

Fig. 8. — Mioclwnus fcrox; a-b and p-w belong to specimen No. 2; b-c to specimen No. 3, aud d-o to
specimen No. 1. Fig. 8. — Anterior i>art of maxillary bone, containing canine and first premolar,
external view; a, inferior view. Figs, b-c, part of mandible of a smaller individual (perhaps 21.
a/rrugatus), external and superior views. Figs, d-o, third, fourth, au<l tilth metatarsals of left foot;
d, fourth metatarsal from front; e, from external side; /, from internal .side; g, proximal extrem-
ity ; h, third metatarsal from front ; i, from outer side ; J', from inner side ; /, proximal extremity ;
m, fifth metatarsal from front; n, external view; o, proximal view; p-u; fragments of No. 2, repre-
sented in Figs. 8 and i^a; p, proximal extremity of supposed marsupial bone, side view; q, proxi-
mal view; r-s-t, an unidentified bone (page — ), two side and one edge view; M-r, opposite side
views of a supposed trapezium; ic, the entocuneiform, external view ; r, proximal; »/, distal views.

Fig. 9. — Mioclirniis protogonioiden. First and second molar teeth, from below. Page 340.

Fig. 10. — iliodcenns biicculentiis. Pp . iv and mm, ii, iii, from below. Page 341.

Figs. 11-14. — IHnHacux ^ navajoriun. P.irts of individual repre8ente<l in Figs. 3-4 (page 741). Seepage
34.->.

Fig. 11. — A posterior dorsal vertebra, left side; Fij;. 12, a lumbar vertebra, left side.

Fig. 13. — Glenoid cavity of scapula.

Fig. 14. — Patella, inner side.

lIS. GEOLOGICAL SURVFf OF THE TERRITORIES

PLATE ;o:

T Smda.i-StSor,, L.t!^

I PMiii'i.M-.ciiiu; ■; III':! .AOiiA:; - .1 ■!• and ii i.-; J)1Ki:al;ii:; '. I'l'inip'i'vc

6 ANlSDNl'l lUll 7 K'lIi'lNAnoni^b'- 0 10 MlllCliAT'lMl H:

PLATE XXV.

Figs. 1 to 9. — Tcmiitherium roatratum Cope. Natural size. ru<;e 221.

Fig. 1. — Ramus of iiandible, outside view.

Fig. 2. — The same, from above; Fig. 3, the same, from below.

Fig. 4. — Right humerus, front view; 4 a, the same, from behiml.

Fig. 5. — Right ulna, from the inner side; 6a, the same, from above.

Fig. 6. — Right radius in place, from inner side; 6a,- the same, from above ; i,b, proximal extremity, dis-
torted by jiressure on one side.

Fig. 7. — Right femur, from front ; n, from behind ; h, distal view.

Fig. b. — Left ilium, from the outside; 8a, the same, from the inside; b, from front.

Fig. 9. — Proximal portion of a phalange; 9a, proximal extremity of the game.

Fig. 10. — A»aj>tmnorphu3 amvhis Cope, type. Left mandibular ramus, double the natural size, from
without: lOn, th'' sa r e trom within; 10 1, from above ; 10 c, from below. Page 248.

S GEOLOGIC.Al. S'JRVETy- OF THE TERRITORIES

PLATE ^'X.'

T. Sinclair &Son,IiilK Plulada

1-8 a•o^AI'^HERIUM rostratum yi. lo amaptomorphus aemul-us Vi.

PLATE XXVff.

Mesodonta and Creodonta.

Figs. 1-3. — Pelycodut tulu) Coye. Two individuals (1-2 and 3), n;itTir:il size. Page 228.

Fig. 1. — Left maxillary and premaxillary bonee, with teeth, from below; u, jiiotiles.

Fig. 2. — Mandible, with fourth premolar and third and fourth true molars, from above.

Fig. 3. — Left mandibular ramus of a second individnal, supporting the last two premolars and tiist true

molar, external view; a, from .above.
Figs. 4-5. — Pflycodujifnigivarut Cope. Natural size.- Page 230.
Fig. 4. — Left maxillary bone, with last four molars, from below.
Fig. 5. — Right mandibular ramus, external view; a, superior, and b, eit/ernal view.
Fig. 6. — Pantolfulfg »ecan«. External view of mandibular raniUH, with posterior four molars; a, from

above; b, intcrtial viHW. Page 7i''i.
Fig. 7. — Hj/opnoduK ricariii>i Cope. Left maxillary and prem.iiillary bones, with teeth, from below ; a,

left mandibular ramus, inner side; b, same from above; c, from outer side. Page 237.
Fig. 8. — MkroHyopH itpirriaiius Cope. Fragment of right mandibuLar ramus, supporting last three molars,

inner side, natural size; a. superior view of molars one-half larger tlian nature. Page 210.
Fig. 9. — Ictops didelphoUlft. Fr.igment of right mandible, natural size, the inner side; a, external side;

h, from above. Page 268.
Fig. 10. — Palate with molar teeth of Deltallienum fundaminit ; natural si. e. Page 278.
Fig. 11. — Right mandij)ular ranms of Didi/mictia dawkinsianun, natural Size, inner side; a, from above;

ft, outer side. Pago :U0.
Fig. 12. — Vidi/mUtiH leptomijliis. Last two inferior molar teeth, inner side, n.atural size; a, superior view;

b, external side. Page 309.
Fig. 13. — Didymivlis altideiig. Last two mol.ar teeth, natural size; a, fiom above; b, external side.

Page 307.
Fig. 14. — Left mandibular ramus of Didymictis altideiis, .supporting parts of last three molars, external

view; natural size.
Fig. Itt.—Ptrathfrinm lomMockiaiium. Part of left mandibular ramus, natural size; o, from above, one-
half longer than nature; ft, from inner side, one-half longer than nature. Page 269.
Fig. 16. — Part of right mandibular ranms of Periptychm carinidcns, with i)art of the deciduous dentition

natural size, external view; a, first and second true molars of the same jaw from above; ft, ramus

from inner side. Page 403.

0E0L.COICA:. S'JRv:e:Y of the TTlRITOFflES

OCV a

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10

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Vv

7c

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T, Sinclair^ SonLjtri Philada

1-5 PELYC0DUS.6 PANTOLESTES. 7 HYOPSODUS. 8.MICR0SY0PS 9.IGT0PS.10 DELTATHERIUM.
11-14 .DIDYMICTIS. 15.PERATHERIUM.16.PERIPTYCHUS.

PLATE XXV6.

Figs. 1-7. — Protopsalis tigrinita Cope. Natural size. Page 3:i2.

Fig. 1. — Supposed last iuf'erior molar, external side; a, internal side.

Fig. 2. — First or second inferior true molar, lacking the anterior part, external side; a, internal side.

Fig. 3. — Right iiilV'rior caniuo, external view.

Fig. 4. — Left mandibular ramus, posterior part.

Fig. 5. — A posterior dorsal vertihr.a, right side; a, anterior articular face; h, inferior surface.

Fig. G. — Proximal extremity of the fourth metacarpal of the right side from front; a, external side; b,

internal side; c, proximal articular surface.
Fig. 7. — Left femur of the same, lacting the condyles, posterior view.
Figs. 8-14. — Sliipolophus whiliw. Parts of one skeleton, natural size. Page 20*2.
Fig. 8. — Kight mandilmlar ramus, inner side.
Fig. 9. — Rigiit superior canine, external side.

Fig. 10. — Anterior lumbar vertebra, from below; a, articular extremity.
Fig. 11. — Left calcaneum, from above.

Fig. 12. — Left tarsus from above, lacking the cuneiform bones.
Fig. 13. — Left navicular, from front; a, right navicular from below.
Fig. 14. — Left cuboid, from front ; a, the same, proximal extremity.

U S GEOLOGICAL SURVE^x^ OF THE TERRITORIES

Pl^TE :<XV b-

T SiijClajr k. San X,ith ^hilada

1-7 PROTOPSALIS TIGRINUS . 6-14 STYPOLOPHUS WHITIAE .

PLATE XXVc.

Figures all natural size.

Fig. 1. — Diasacus navajoviun. Right mandibular ramus, external view ; o, from above. Page 345.

Fig. 2. — Triisdon quiiirensis. Left mandibular ramus, with temporary fourth premolar, external view ; a,
the same, from above; b, the same, inner side, with the alveolar walls removed, displaying the per-
manent fourth premolar ; c, superior view of the permanent fourth premolar. Page 272.

Figs. 3-4. — Conoryctes comma, typical specimen; fig. 3, left mandibular ramus, outer view; o, inner; b,
superior views; 4, left inferior canine tooth, external view; a, internal view.

Figs. .VS. — Anigonchus sectorius ; p, maxillary bone, with three molars; a, from below; 6, mandibular
ramus of probably the same individual; a, from above; 7, mandibular ramus of a second individ-
ual ; 8, mandibular ramus of a third, with deeper ramus ; aa, from above. Page 413.

U S GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE :o:v

j.^'

\

v^;-*>-

.J^

«H& ,/J

fl^V

-i**-. :^

1^

m

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l.DISSACUS NAVAJOVIUS, a.TRlISODGN QUIVIRENSIS 3-4 CONORYCTES COMMA.

5-8.ANrSONCHUS SECTORIUS

PLATE XXYd.

Figs. 1-2. — Stypolophus whitia;. Skull, natural size, from tho Big Horn Basin, Wyouiing; posterior region
restored from a skull of St. cat/lusi Filliol ; lig. 2, posterior view of right mandibular ramus. Page
i;92.

Fig. 3. — DeUatheriumfuiidaminia. Left mandibular ramus, natural size, from New Mexico ; a, inner side ;
6, superior view. Pago 278.

Figs. 4-.5. — THdijmictis protenus. From the Big Horn, natural size. Page 311.

Fig. 4. — Maxilhiry bone support iu last four molar teeth, from below: a, from left side.

Fig. 5. — Mandible of the same species, from aViove.

Fig. 6. — Didymictis leptomjilus. Larger variety, portion of left Miaudil>U', from above. Page 309.

U S GEOLOGICAL SURVFf OF THE TERRITORJES

PLATE X:xV

T. SiT\cUir&Sorv, Lith TW.'.a.-

STYPOLOPHUS WHITIAE 5 DELTATHEFUUM FUNDAMINIS 4-5 DIDYMICTIS PROTENDS 6 D LEPTOr-.

PLATE XXVe.

Figures all natural size, except Figs. 23 ami 21, which are j nature.

Figs. 1, 2. — Parts of skull of an individual of Haploconus lineatue. Page 417.

Fig. 1. — Palate from below.

Fig. 2. — Right mandibular ramus, inner side.

Fig. 3. — Left mandibular ramus of the same species, inner side; a, from above; second individual.

Fig. 4. — Right mandible of a third individual of the same species, external view ; a from above.

Fig. 5. — Haploconus xiphodon. Right ramus, inner side ; a, from above. Page 420.

Fig. 6. — Milk dentition and two molars of the Siime species, from above.

Fig. 7.—Ani807wliu8 8ictoriu$. Mandibular ramus, external side ; o, internal side. Erroneously marked

A. apiculatux on the i^late in some of the editions.
Fig. 8. — Pantolambda ballimodon. Part of left mandibular ramus supporting two premolars aud one

true molar from above. Page 603.
Figs. 9, 10. — Ectocium osbornianum. One individual. Fig. 9. Left maxillary bone with last premolar

and first two true molars from below; a, external view. Fig. 10. Left mandibul.ar ramus, inner

side; «, from above. Page 696.
Fig. 11. — Right mandibular ramus of Anacodon itrsidens, from above. Page 427.
Figs. 12, 13.— Jaws of one individual of Phenacodits piiercenais. Fig. 12. Left maxillary bone with last

four molars from below. Fig. 13. Right mandibular ramus, internal view; a, same from above.
Page 488.

Fig. 14. — Left mandibular ramus of P/ienaco(J«s &cac/(^2'''*''""S) ^^t^'''^'i' ^'<1® > "> from above. Page 490.
Fig. 15. — Phenacodus macropterniis. Mandibular ramus supporting the true molars; a, from above.
Fig. 16. — Phenacodus hemiconu8. Posterior two superior molars of right side from below. Page 463.
Figs. 17, 18. — Diacodexis laticuneus. Parts of one individual. Fig. 17. Left maxillary bone with six

molar teeth ; a, external view of the same. Fig. 18. Last inferior true molar from above. Page 492.
Figs. 19, 20. — Mioclvnus tur(jidti8. Parts of one auimal. Fig. 19. Palatal view. Fig. 20. Left mandi-
bular ramus, external vievr ; a, from above. Page 325
Fig. 21-23. — Miocl<cnu8 mitiimua. One individual. Internal view of left ramus, natural size.
Fig. 22. — Superior view, 5 natural size. Fig. 23. Superior molar from below, J nature. Page 327.
Fig. 24. — Pantohatea etaagicua. Right mandibular ramus, internal view; a, from above. Page 724.

us GEOLOGICAL SURVFf OF THE TERRITORIES

PLATE XXV e

'^«■%fli%.^

^n^.'h^

A I ■

<Ki™»ca^

23

^^^'--A^

W^ ™'^^

■ " -r Sinclair 8: So^. IilK PKi'

1-4 HAPUQCONUS blNEATUS 5 H XIPHODON 7 ANISONCHUS 3ECT0HIUS 8 PANTOLAMBDA BATHMODON
9-10 ECTOCIUM OSBORNIANUM 11 ANACODON URSIDENS 12-13 PHENACODUS PUERCENSIS .
i^.PBRACHYPTERNUS 15 P MACROPTERNUS 16 P HEMIGONUS 17-18 DIACODEXIS LATIGUNEUS
19-20 MIOCLAENUS TURGIDUS 21 -23 M MINIMUS 24- PANTOLiESTES ETSAGICUS

PLATE XXV/.

Figures of Condylarthra ; excepting Figs. 1 and 19, which are Creodotiia and Marsupialia ; natural size.
Fig. l.—Disumtis carnifex. Right inan<!ilmlar ramus right side ; a, from above. Page 34,5.
FigM. 2, ■i.—Protogonia pUcifera. 2, inaxillarv Ijoiie with Pm. IV and Ms. II and III, from below ; 3, cor-
responding teeth of mandibular series. Page 424.
Fig. 4. — Right molar series ot llaploconus entoconus from below. Page 421.
Fig. 5.- Right mandibular ramus and teeth of a second specimen of Haphcoima entoconws, external

view ; a, from above. Pago 421.
Fig. 6.— Right maxillary with molars of HemitMceua Icowalevskiativs, from below. Page 405.
Fig. t.—UemWdaus howalerskianua. Right mandibular ramus, internal view ; a, from above. Page 405.
Fig. 8.—IIemUhlaius opiMacus, ramus of mandible, external view; o, from above. Page 405.
Fig. y.— Superior molar of specimen of Z7emirtte«so;)is(Aac«s represented in Fig. 8, from below. Page 405.
Figs. 10, 11.— Atiiaonchus gilUanus, one individual ; 10 right molar series, from below ; 11 mandibular

ramus, external side ; a, iiitcrnal side; b, from above. Page 411.
Fig. 12.— 3Ieiiiscolha-iiim terraruhra. Left maxillary bone with teeth, from below. Type of the species.

Page 496.
Fig. 13. — Skull of a second individual of Meniscotlwriitm UiraTubrw, left side ; a, from above. Page 496.
This skull was fractured across the narrow postorbital region, and it is possible that a little of the

length may have been lost, though this is not certain.
Fig. U.-Meniscoilterium terran-uhrce. Mandibularramusof a third individual, right side; a, from above.

Page 496.
Fig. Ib.—Menitcotherium tapiacitis. Right mandibular ramus with symphysis, right side; a, from above.

Page rm.
Fig. 16.— .l/ioc?at«u« haldivini. Left mandibular ramus, external side ; a, from above. Type of species.

Page 328.

Fig. 17.— Mioclwnus protogmiioidet. Last two superior molars of left side, from below. Type of species

Page 338.
Fig. 18. — Miocl(Bnus minimui. Mandible, from above. Typical specimen. Page 327.
Fig. 19.— Ftilodiis iroiessartiaiitia. Fragment of left mandibular ramus. Page 737.

U^S GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE XJiV f

T Smclaii StSo-n, Lith Piiila

LDIS3ACUS^2-3-PROTOGONIA 4-5 HAPLOCONUS 6-9. HEMITHLABUS 10-11 ANISONCHUS -
■■'.' 12-15.MENiSCOTHERIUM 16-18 MIOCLAENUS ig.PTIbODUS

PLATE XXV^

Figures of bones of ileniscotherium lerrcsnibrcd. Natural size. From New Mexico. Figs. 3-9 + 1, 12,

15, 16, and 19 from specimen No. 1. Fig. 18 from individual No. 2. Figs. 10, 11, 17, from No. 3.

Figs. 1, 14, and 20, from No. 4. Fig. 2, from a fifth individual. Page 496.
Fig. 1. — Palate and superior molar teeth, from below.

Fig. 2.— Thi- same, but with the deciduous molars in place and the last true molar partially protruded.
Figs. 3-9+ 1. — Vertebral column, which is composed of vertebrae which were found associated with jaws

and bones of three individuals, and included nnderthe head of specimen No. 1. Figs, a, anterior

views ; Figs, b, inferior views.
Fig. 10. — Second or third segment of sternum, from above.
Fig. 11. — Proximal view of proximal end of scapula.

Fig. 12. — Left humerus, from behind ; a, from front ; ft, proximal end ; e, distal extremity.
Fig. 13. — Distal extremity of the left hnmerus of a second individual, internal view, showing epitroch-

lear bridge.
Pig. 14. — Parts of right ilium and ischium, external view.
Fig. 15. — Left femur from front ; a, from behind. The part above the oblique fracture is derived from

a second specimen.
Fig. 16. — Kight tibia, from front ; a, from behind ; b, proximal ; c, distal extremities.
Fig. 17. — Distal extreuiity of fibula.

Fig. 18. — Kight astragalus, external view ; a, from above ; ft, below ; c, distal view.
Fig. 19. — Right calcaneum, external side ; a, from above.
Fig. 20. — Patella, posterior side.

LI S GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE X>:V

T smolaii St Sou. ^,itl^-Thil»

M

ENISCOTHERIUM TERRAERirBBAE COPE M

PLATE XXVI.

Figs. 1,2. — Siypolophus aculeatua Cope, from specimen in Princeton College Museum; a, both jaws in
profile ; b, maxillary bone from below ; c, mandible from above. Page 299.

Figs. :?-10. — ifesonyx obtusid^ine Cope. Natural size ; 3, partial dentition of the lower jaw ; a, canine ;
(f, end of the root ; b, first, c, second premolars ; d, anterior molar ; e, the same from above ; /, poster-
ior molar; g, the same from above. Page 355.

Fig. 4. — Left malar bone.

Fig. 5. — Extremity of left femur, from the outer side ; 5 a, distal, and 5 6, inferior views.

Fig. 6. — Proximal end of right tibia, proximal view; 6 a, external view.

Fig. 7. — Patella, from front ; a, from side.

Fig. 8. — Astragalus, inner side ; 8 a, from above ; 8 b, from below.

Fie. 9. — Distal extremital view of astragalus and calcanenm in natural association ; a, ianeT ; b, enter
astragaline facets; c, ciiboid facet of calcaneum.

Fig. 10. — Calcaneum, from above; distal portion broken oflf.

Fig. 11. — Portion of ulna, interior view.

Fig. 12. — Scapula, proximal view ; 12 a, external view.

GEOLOGICAL SURVir:^ OF THE TEFtRlTr'reL.r

ri^TE XXVI

-T. Sinclair iSonlilh Philada

1-Z STYPOLOPHUS ACULiEATUS. 3-12 MESONTX OBTUSIDENS.

PLATE XXVII.

Figs. 1-24. — Mesonyx obtusideM Cope. Natunil size. 1, distal portion of tibia, front ; a, back; 6, distal
view. Page 355.

Fig. 2. — Second metacarpal, anterior face.

Fig. 3. — End of metapodial boue ; 3 a, from behind.

Figs. 4, 5. — Ends of metapodial bones ; 5 a, from behind.

Figs. r>, 7. — Proximal phalanges ; 6 a, from behind.

Figs. 8-11. — Distal phalanges, a, proximal extremities.

Figs. 12, 13. — Ungual phalange.s ; a, from below ; b, proximal ends.

Figs. 14-24. — Vertebra; 14-15, dorsals; 16-19, lumb.irs ; 20, sacral; 21-24, caudals; o, articular extrem-
ities.

Figs. 25-8. — ilemmyx laniint Cope. Carpal and tarsal bones, natural size. Page 35.S

Fig. 25. — Pisiform boue ; a, distal ; b, proximal end.

Fig. 26. — Cuneiform bone, from front ; o, from above ; b, from below.

Fig. 27. — Ectocuneiform bone, from outside ; o, from below ; b, from above.

Fig. 28. — Calcaneum, proximal end lost.

IJ 3 GEOLOGICAL SUi^.'E'y^ OF THE TERRl TORES

PLATE XX^/I!

13 d

^ T Sinclair & Soiulith Philada _

1-24 MESONYX OBTUSIDENS 25-8 MESONYX LANIUS.

PLATE XXVIII.

Figs. 1-6. — 31esonyx laniiia Copo, 1— J ; two-fifths natural size; 5-6 natural size. Specimen figured in

Plate XXVII. Page 358.
Fig. 1. — Crauiiim restored.

Fig. 2. — Muzzle from the front ; fig. 3, the same from below.
Fig. 4. — Tympanic aud periotic bones, from outside ; 4 a, from above.
Fig. 5. — Ulna, inner side ; 5 a, outer side.
Fig. C. — Radius from below ; a, from above ; 6, prosira.al articular face.

U S GEOLOGlCiAL. SURyETY" OF THE TERRITORIES

PLATE XXVIIL

W

O
o

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PLATE XXVlIIa.

Fig. 1. — Skull of Mesonyx osaifragut, lacking the occiput and brain case, two-thirds natural size. From
the Big Horn River, Wyoming. Page 362.

us GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE VX-.TII .

T Smclair SiSo-n, Lith ?Kila,

MESONYX OSSIFRAGUS GOFE.H.

PLATE XXV II 16.

Jaws iiurt bones of Mesanyx osfifracrus. Same iDdividnal tigmed on Pliiti' XXVIIIrt ; two-thirds natural

size. Page 362.
Fig. 1. — Mandible, right side; «,rr<)iu above.
Fig. '2. — Two posterior dorsal vertebrie, left side.
Fig. 'i. — Lunar and cuneiform bones dislocated, front view.
Fig. 4. — Magnum, from side ; a, from front.

Fig. 5. — M.ass containing neck and head of scapula, with a metacarpal adherent to the side.
Fig. 6. — Sledian metacarpal, from below ; a, lateral view; h, distal view.
Fig. 7.— rbalange.

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PLATE XXVIIIc.

Bones of the individual of ilenoiiyx ossifragus tigured ou Plate XXVIII a. Page 362.
Fig. 1. — Right Immenis, front view ; a, posterior view ; b, distal view. The proximal extremity is dam-
aged in both humeri of this specimen, and it is heuco imperfectly represented.
Fig. 2. — Ulna and radius in relation, anterior view; o, external view; i>, internal view; c, distal view.
Fig. 3. — Proximal view of proximal extremity of femur.
Fig. 4. — Tibia, posterior side.

>

PLATE XXYllld.

Maonyz ossifragut. Bones of tbe specimen figured in Plate XXVIII a, two-thirds uataral size. Page 363.
Fig. 1. — Femnr, from front; a, from behind; h, distal extremity.
Fig. 2. — Tibia from front ; a, proximal view ; /;, distal extremity.

Fig. 3. — Calcaneum, and 4, astragalus, from above ; a, internal view ; 'ih, from above, without astra-
galus; 46, from below, without calcaneum; c, distal extremity.
Figs. 5-C. — Proximal and distal extremities of metacarpals ; f), lateral; C, anterior views.
Fig. 7. — Radius, proximal view of head.

U S GEOLOGICAL SURVEY OF THE TERRITORIES

PLAlfc: XXVIIld

rSLtaon, LiTh Ph:

MESONYX OSSIFRAGUS COPE.^i.

PLATE XXIX.

Figs. 1-5. — Meson yxlaniita Cope; 1-2, two-fifths iiatiinil si/e; :J-.">, natural size. Specimen figured in
Plate XXVII. Page 3.58.

Fig. 1. — Left humerus, outer side ; la, left humerus, posterior face ; lb, head.

Fig. 2. — Kight huiuerus, from behind. Tlie restorations of these humeri are probably too long.

Fig. 3. — Motapodium and ph.alanges of left fore foot; a, proximal view of second row of carpals.

Fig. 4. — Scaphoid bone of the same, from above; 4o, from below.

Fig. 5. — Ungual phalange, from above; .")<i, from below; 56, proximal end.

Fig. 6.— Cuboid.

Fig. 7. — Ulna of an Amblypod allied to Vintatheriiim, smallest species, from the outer side, about one-
half the natural size.

Fig. 7a. — The same from above, exhibiting the groove for the ulna.

U. S GEOLOGICAL SLIRVE?/ OF THE TERRITORIES

PLATE XXIX

-T. Sinclair iSon.IiitIi Philada

1 - 6 SYNOPLOTHERIUM LANIUS. 7. UINTATHERIUM.

PLATE XXIXa.

Figs. 1-3. — Mandible of liathyopais Jiasidena, two-thirds natural size. Page 597.

Fig. 1. — Right side, and inner view of left dental series.

Fig. 2. — Superior view.

Fig. 3. — Anterior view.

Fig. 4. — Glenoid cavity of scapula of Coryphodoii latipea, from Evanston, Wyoming, three-fifths natura!

size. Page 526.
Fig. 5. — Proximal view of head of humerus of Coryphodon latipea, same locality as last, three-fifths

natural size. Page 32<J.

GEOLOGICAL. SURVEY OF THE TERRITORIES

FI^TE :<XLX:a

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BATHYOPSIS FISSIDENS

'.Sinclair & Son.ljiih "F>l

/

PLATE XXIX 6.

Pantolambda bathmodon. Parts of ekelotou figured on preceding plate; natural size. Page 603.
Fig. 1. — Skull restored from numerous fragments, left side.

Fig. 2. — Left maxillary and part of malar bone, with true molar teeth somewhat broken, from below.
Fig. 3. — Posterior part of right mandibular ramus, supporting m. i and m. iii, with the heel broken,

from above.
Fig. 4. — Symphysis raaudibuli, from the front, with the incisive alveoli.
Figs. 5-15. — Vertebrie; .">-(5, cervicals; 7-11, dorsals; 12-13, lumbars; 14-15, caudals; lateral views;

a, inferior views ; b, posterior views ; c, anterior views.
Fig. 16. — Astragalus, from above; a, from below ; 6, inner side; o, posterior view; d, distal view.
Fig. 17. — ^Navicular bone, anterior view ; a, external view ; b, distal face.

,S. GEOLOGICAL SURVEY OF THE TERRITORIES

PLATK XXIX

1' ^Tiuclaii 4. Sen, L-.tn

PANTObAMBuABATHMUDOM COHE H

I

PLATE XXIXc.

Nig- 1.— Last two superior molars of Vonjphodon ehphautopus, natural 8ize, from below. From the Big

Horn liasiu. Page 531.
Kig- 2.— Last superior molar of Cori/phodon Kp.f or Batlimodon radians, from he\ow, a, external view.

Natural size. Page 544.
Fig. 3-7.—l'antolambda hathmodon. Parts of the individual figured on Plate XXIXa; natural size

Page 6U3.
Fig. ;{.— Right humerus without head ; anterior view ; n, external view; b, posterior view.
Fig. 4.— Second metacarpal from front ; a, posterior view ; h and c, lateral ; d and e, proximal views.
Fig. 5.— Peuultiniate phalange, front view; a, inferior view ; 6, proximal view.
Fig. 6.— Ungual phalange from ahove ; a, from below ; 6, proximal view,
^''g- 7.— Left ilium with apex broken oflf, external side ; a, internal side ; b, anterior side.

U S GEOLOGICAL SURVFf OF THE T.ERRIT0R1ES

PLATE XXtXc

mm: J

T. Sinclair S. bon, Lith PhiW.

1 COR^i-pHODON ELjEPHANTOPUS „

jATIPES 3-7 PANTOLAMBDA BATHMODOM

PLATE XXIXc?.

Fossils of the Puerco epoch, natural size, except Fig. 9 a.
Fig. l.—PantoUmbda eaririclus Cope, right mandibular ramus, external side; a from above.

Represented by a nearly entire mandibular ramus with all the teeth represented excepting the
crowns of the incisors. The characters are seen, first in the large size, the teeth having twice the
linear dimensions of those of the P. hathmodon ; and second, in the lateral prominence of the inferior
edge of the ramus, which produces a concavity of the side of the jaw posterior to the canine teeth.
It is the largest mammal known from the Puerco formation.

The inferior canines are strongly curved, so that the crown is directed upwards and a little back-
wards. Both root and crown have a round section, but the apex of the crown cannot be described,
as it is greatly worn by use in the specimen. The incisive border is regularly convex, and the
three incisors are not of large size, the first being least, and the third largest. The premolars and
molars have the form of those of the P. hathmodon. The latter present two V's, the anterior nar-
rower and more elevated. In the former the posterior V is represented by a short crest. The last
molar is produced into a heel, which supports the posterior branch of the posterior V, and no cusp.
The first premolar is one-rooted, and is separated from the second premolar by a moderate diastema.
The symphysis is not long, is regularly curved upwards, and has a flat inferoanterior face. The
cauine alveoli create a marked prominence on each side.

ifeas«remen(3.— Depth of ramus at diastema, m. .045; do. at third premolar, .056; width of ramus
below third premolar, .021; length of bases of three incisors, .023; diameters of canine at base:
anteroposterior, .018; transverse, .018; diameters third premolar: anteroposterior, .012 ; transverse,
.Oil; diameters first true molar: anteroposterior, .077; transverse, .014; diameters third true
molar; anteroposterior, .022; transverse, .014.

The jaw of this species is about the length of that of a large tapir, but is deeper and more robust.
The flare of the inferior edge in front is suggestive of the structure seen in the Divocerata, and of
the probability that the Taligrada (to which Pantolambda belongs) are the ancestors of that sub-
order as well as of the Pantodonta. The flare is related to the flange of Uiutatherium, exactly as
the similar ridge in Nimravus is to the flange in Machsrodus.
Figs. 2-6.— Co«ari/c(es ditrigonus, parts of three individuals, viz, fig. 4 of an immature animal, and the

other figures of two adults.
Fig. 2.— Left maxillary with teeth, the fourth premolar belonging to a separate individual from that

which has furnished the remainder of the specimen.
Fig. 3.— Fragment of mandibular ramus with last two true molars, from above, probably from tUe indi-
vidual which is chiefly represented in Fig. 2.
Fig. 4.— Right maxillary with three deciduous and one permanent molar in place, from below.
Fig. 5.— Head of tibia of individual represented in Fig. 3, proximal view.
Kg. 6.— Distal end of tibia of Fig. 5, anterior view ; a, distal view.

These specimens were received too late for insertion in the body of the work. They indicate
that the species must be referred to the genus Comrycteg Cope, and render it very probable that the
genus belongs to the family of the Periptychidse. The absence of ungual phalanges prevents abso-
lute certainty. The genus is near Periptychm, but differs in the one root and simple conic crown of
the second true molar in both jaws, and the presence of cingular cusps of the superior molars,
exterior to the external tubercles. Conwyctea ditrigonus has the molars of both jaws larger than
those of the C. comma, and there is less difference in size between the posterior and anterior true
molars than in that species.

Figs. 7-8. — Periptychus coarctatuB, last two premolars and first tnip molar of the inferior series, external
side; a, inttTiial side; b, superior view.

The al)ovc spocimens were received too late for description in the body of this volume. Hence
I append the following from the proceedings of the Philadelphia Academy of July, 1883 : The
characters of the species are well marked in the premolar and molar teeth. The former lack the
anterior and internal ledges of the P. carinidens and P. rhahdodon, having only a prominent ledge-
shaped heel, besides the principal conical cusp. The true molars lack the small tubercle which is
between the pair of threes which compose the crown. The adjacent cusps of the threes are con-
nected by low longitudiual ridges instead of oblique ones. The cusps themselves are closer together
than in the other species, especially those of the anterior three, which are closely approximated.
The anterior one is small and low. The enamel is grooved as in the other species.

Diameters of crown of fourth premolar: anteroposterior, .0115; transverse, .0115; elevation
(worn), .010. Diameters of crown of second true molar: anteroposterior, .011; transverse, .009.
From the Lower Puerco beds. D. Baldwin.
Fig. 9. — Zetodon gracilis, two fragments of the mandibular ramus, external view, natural size ; a, the
same, twice natural size, from above.

I append the following description of this specimen, as it is not contained in the preceding pages :

This genus and species are founded on a broken lower jaw which contains the second and part of
the lirst true molars, and the fourth premolar. The teeth are of very peculiar character. True molars
consisting of narrow crescents in two pairs, which are both concave towards each other, embracing
a fossa. The posterior crescents soon unite on attrition, closing the fossa, while the anterior are
well separated, and only unite by their anterior apices. Each molar has a small columnar heel.
Fourth premolar with the posterior pair of crescents only, which soon unite. The anterior pair is
represented by a part of the external one, which forms a narrow lobe. The heel is larger than in
the true molar.

The position of this genus it is impossible to determine from the specimens in my possession. It
may be Marsupial or Condylarthrous, and if the latter, one of the Periptychida ; but if not of these
groups, its position is not likely to be in any known order of the tertiary periods.

Char. Specif. — Crowns compressed, deeply grooved at the points of junction of the crescents. This
is effected by a narrow lamina from the anterior inner to the posterior outer; the anterior outer
bein" free posteriorly, excepting after considerable wear. A groove on the external side of the
crown distinguishes the heel, which sinks into the crown below. It is larger on the first than on
the second molar. The heel of the fourth premolar is elevated on its posterior edge. No cingula
except a weak one at the exterior base of the posterior lobe of the true molars, and at the anterior
base of the anterior lobe of the fourth premolar. Ramus compressed ; but little of it preserved.
Diameters of p. m. iv. : anteroposterior, .0055; transverse, .0020; of second true molar: anteropos-
terior, .0045; transverse, .002. From the lower red bed of the Upper Puerco epoch. D. Baldwin,
discoverer.

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PLATE XXIXe.

Skeleton of Phenacodus I'orimani Cope, oue-third natural size. Found in place in the Wasatch Eocene
of the Big Horn Basin, by J. L. Worf man. Page — .

PLATE XX I X/.

Bones of tbo skeleton of I'henacodus rorlinaiii figured on tbo preceding plate, natural size.
Fig. 1. — Skull from above, uatiiral size, tbo original somowbat distorted; a, the same, from below.
Fig. 2. — Tbo alias, from i^elow ; a, posterior view.
Fig. ^>. — Tbo axis, from bolow ; a, anterior view.

Fi}r. 4. — Tbe third cervical vertebrae, from bolow ; a, irom front ; b, from liehind.
fig. f). — The fourth cervical vertebra;, from below.
Fig. 6. — The fifth cervical vertebra;, from bolow ; n, troin IVoi c.
Fig. 7. — The sixth cervical vertebrae ; a. from front.
Fig. f*. — Huj.."ru8, proximal view ; a, distal view.
Fig. 9. — Ulna and radius, anterior view ; o, distal view
Fig. 10. — Right ilium, anterior view,
i'lg. 11. — Femur proximal and a distal views.
Fig. Vi. — Lcf' tibia, from front ; a, proximal view
Fig. 13. — Lc't astragalus, ii.temal view ; a, inffiior view ; b, distal view.

t •. ;

US GEOLOGICAL SUR'^/Erf OF THE TERRITORIES

PLATE X>: IX f

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PHENACODUS VORTMANI '/i

PLATE XXX.

Eobaailetm premicorfiis. Samr individual as Plate XXXI, except Fi};. 6; all one-third natural size.

Page ofri.
Fig. 1. — Astragalus of left side, from above.

Fig. 2. — The same, from below. •

Fig y. — A cervical vertebra, from front.

■ia. — The same, from behind ; and

'.ib. — The same, from above.
Fig. 4. — Acetabulum of left side, with adjacent parts of ilium, ischium, and pabiB.
Fig. 5. — Fibula, inner side.
Fig. 6. — Distal part of right humerus, posterior side.

1! e rjEOLOGICAl. SURVEY OF THE TERRITORlFt

PL.ATE >::XX

T SmclaiT A Son lith Philada

1 - 5. EOBASILEUS PRESSICORNIS

PLATE XXXI.

Eobaaileus presaieornis Cope. Same as Plato XXX. One-third natural size. Page 562.

Pig. 1. — Right femur, posterior view; In, the same, proximal view.

Fig. 2.— Right tibia.

Fig. 3.— Right fibula ; aud

Fig. 4. — Left astragalus, from the front.

2a, 3a, aud 4o. — The same from behind.

26. — Proximal end of tibia.

2o. — Distal end of the same.

U S GEOLOaiCAL SURVEY OF THE VKHht I'OftlEo

PL^Mn. XKXI

.-*S5£#

T Sinclair A Son Lith Philada

EOBASJLEUS PRESSICORNIS .

PLATE XXXII.

Eohasileue furcatu)) Cope. Fig». 1, 2, ;i, one-third natural size. Fig. 4, one-half uatural size. Page 565.

Fig. I. — Cranium, reconstructed conjecturally from fragments of the left side ; a, extremity of uasal
bone, with tuberosities ; h, portion of preniaxillary ; c, d, e, maxillary bone ; d, naso-uiaxillary horn-
core ; /, malar bone ; g, lateral parietal crest ; h, mastoid tul>erosity ; occipital condyle.

Fig. 2. — Naso-niaxillary horn-core; a, from the front, with nasal bone.

Fig. 3. — Nasal bone ; ia, apex, from above.

Fig. 4. — Lunar bone; a, from outer; b, from inner side; o, distal; d, proximal articular faces.

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PLATE XXXIII.

Eoba»ileue furcatua Cope. Figs. 1-5, oue-third natural size ; the same individual figured in Plate XXXIL

Page 565.
Fig. 1. — Posterior view of occipital region.
Fig. 2. — Postero-snperior view of the same.
Fig. :5. — The atlas, posterior; 3o, anterior.
Fig. 4. — Femoral condyles, from l)elow ; 4a, distal view.
Fig. 5. — Posterior horn-core; 5a, posterior; 5i and be, lateral views.

Fig. 6. — Unciform bone, inferior face ; («j, superior face ; 66, interior, and 6c, anterior faces.
Fig. 7. — Unciform bone of ifaatodon ohioiicua, viewed from below.

U S GEOLOGICAL SURVEV OF THE TERRITORIES

pi^TE xxxni

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l:

T Sinclair i Son.Iith Philada

6 UINATHERIUM FURCATUM .

PLATE XXXIV.

Uinlatherium, »{). Oue-third iiatnnil size ; portions of one skeleton. Page 593.

Fij;. 1. — Left fiMiinr; soinn rra;;iiiont>) fniiii luidiUo of shaft pnibably wanting.

Fig. '2. — The same, posterior view.

Fig. 3. Odontoid process of axis.

Fig. 4. — Cervical vertebra, articnlar face ; ia, same, frmn below ; 4J, lateral view.

Fig. .5. — Dorsal vertebra, lateral view ; 5a, articular face.

Fig. fi. — Portion of unciform bone, the narrow extremity broken oflf.

U S GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE XXX r.'

L_

T.Sinclair &Son,Iith Philada -

U i NTAvTHERIUM

PLATE XXXV.

rintatheiiiim. The saim- iiuliviilii:il as tbt- last, (iiii--tliird natural size.

Fig. 1. — Femur, lanximal ciul ; 1 a, distal eiul.

Fig. -2.— Tiliia i>l' left sidr, from front ; -i a. tinm Inhiiid ; J '■. luoximal imkI ; 2 o, distal end.

Fig. 3. — Fibula, proximal ; :? n, distal ends.

Fig 4.— Astragalus, from above; 4 a, from below.

Fig. ,'>.— Astragalus and laleaueum in iiositiou. exterior lateral view.

Fig. i;.— Cakamuni from above ; C a, inferior view ; 6 b, interior lateral view ; tJ c, from front, showing

small cuboid facet.
Fig. 7.— Cuboid bone, posterior angle broken off, front view; 7 a, tlie same, from below; 7 6, from

above.

S GEOLOGICAI-, SURVEY OF T?iE TERRITORIES

PLATE XX X^/

T Sinclair* SonTJth t-^-'iada

UINTATHERIUM

PLATE XXXVI.

Fig. 1. — Synipbysis mandibuli of rintatherium rohustiim, from Henry's Fork, Wyo. ; .75 of natnral size;
1, from right side; la, from left; 1 6, from below. Page 5^9.

Fig. 2. — Two last iiiolurs of left ruiniiK of the same iudividnal, .0 natural size.

Figs. 3-8. — Teeth of f Vinlalherium laamtre, natural size ; fig. 3, first i)reniolar, exteinal view ; 3 (j, crowu,
from above ; 3 h, antero-jiosterior view. Page 591.

Fig.s. 4, 5. — Posterior and median jireinolars, crowns, from above.

Fig. 6. — Last premolar, from above ; 6 a, lateral view.

Fig. 7. — First molar (broken), from above.

Fig. 8. — Last molar (broken), from above ; 8 a, the same, posterior view.

Fig. 9. — Fragment ot aca.\iu\!t,oi EohasUeus jrressicoDns, outer view ; 9 u, glenoid cavity, one-fourth natu-
ral size. Page 5G'2.

Fig. 10. — Posterior superior molar of I'alceosyops raUldens Cope, from Mammoth Buttes, Wyoming.
Page 661.

S GEOLOCIIC^AL, SURVTvY OF THE TERRITORIES

PLATE XXXVl

T. Sinclair & rioiv Li'.h Thii-j-'l.!

DJNOCERATA PALAEOSYGPS .

PLATE XXXVII.

Loxolophodon coniiitiis, inolilo of cranium fioui right side, oiie-tliird linear measurements of n:H ural hize.
The lower jaw is copied from the figure of M. Osboni, in the American journal of science and arts.
Type of the species. Page r>74.

U S GEOLOGIOU. SUHVEV OF THE TEBRITORIi:^

PLATE XXXVll

PLATE XXXV III.

Loxolophodon comutui, skull figured iu Plate XXXVII ; two views, superior and iuferior ; cue-third

natural size. Page 574.

ij 8 sEOL';Gi'>i. i"''r<".i-

PLATE XXXIX.

Cranium oi Loxolophodon comuUis, represented ia the last plate, anterior view, one-third nature. Page

574.

U S GEOLOGICAL SURVETy' OF THE TKRRiTfJRIRS

PLATE XL

Loxolophodon cornutiis. Cope. Figs. 1, 2, one-fourth, ligs. 3, 4, one-third uatural size. Page 574.

Fig. 1.— Scapula, external face; fig. 2, the same, anterior view; fig. 2 a, its glenoid cavity.

Fig. :i— An anterior dorsal vertebra, articular face of centrum ; 3 a, from the side ; 3 6, floor of neu

canal.
Fig. 4.— Lumbar vertebra, articular face (without epiphysis); 4 a, lateral view; 4 b, inferior view.

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Loxolophodon cornutus Cope. Figs. 1, 2, 5, oue-tliird nutural size; figs. 3-4, one-fourth natural size.

Pa-e r>74.

Fig. 1. — Proximal end of radius; 1 «, distal view.

Fig. "J. — A portion of an anterior rib from side; 2 ii, a portion of the same rib from opposite side;

2 b, proximal extremity.
Fig. 3a. — Sacrum, from above; 3, sacrum, in place.

Fig. 4. — Pelvis, from front ; 4a, lateral view of the same, from the left side.
Fig. 5. — Proximal extremity of femur; 5o, distal extremity of the same.

U S. OEOLOaCAL SURVEy OF THE ■reRR'TOBEto

PLATE XU

LQXOL.OPH0DON COfu'^

PLATE XLIL

Right femur of Loxolophodon corimtas Cope, oue-third natural size. Fig. 1, anterior; flg. 2, posterior;

fig. 3, external view. Page 574.

U. S GEOLOGICAL SURVLV OF TiiE TERRJTOlllF;;

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juxolophodok cororjTUs i

Sinclair & Son liith Phiiada

PLATE XL II I.

Fig- 1- — Loxolopliodon galeatus. Skull ii'stored from i'raguients, after L. cormitus, right side ; a little less

than one-third natural size. Page 585.
Fig. 9. — Apex of one of the iiasomaxilliuy horn.s.
Fig. ^. — B.asc of the other nasomaxillary horn ; a, its apex.
Fig. 4. — Extremities of n.asal lioues from above; a, from below.
Fig. .'■>.— Head of tibia of Corijphodon latipes, from Be.ar River, Wyomiug ; (page .">30) oue-half natural

size.
Fig. G. — Scaphoid bone of a Cori/phodoii.

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PLATE XLIV.

Loxolophodon galeatas. Skull figured iu Phitc XLIII ; auterior and posterior views, the former restored

from fragments. Page 585.

IJ S GEOLOGICAL SURVEY OF THK TERRITORIES'

PLATE XL IV

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LOXOLOPHODON GALEATUS COPE Vs.

PLATE XLIVa.

TeetU of Coryphodoiiiidw. Natural sizo.

Figs. 1-5. Manteodon subquadnit us C'oi)e. Page 518.

Fig'. 1. Last superior molar, from below.

Fif;. 'J. First sujierior premolar ; inuerside; o, external side.

I'^ig. '■'. Incisor, iuuer side.

Fig'. 4. Another incisor, external side.

Fig. 5. Last inferior molar, external side ; anterior crest wanting ; o, the same from behind.

l'''ig. 6. Superior molar series of left side, lacking first premolar, of Ectacodon cinctiis Cope, type. Page

.520.
Fig. 7-11, Teeth of typical specimen of Coi-iiphodon anax Cope. Page 537.
Fig. 7. Last superior molar, from below.

Figs. 8-10. Incisors, external view ; a, internal views of crowns.
Fig. 11. Posterior part of la.st inferiormolar, viewed obliquely fromtho internal and posterior direction;

showing the extremity of the posterior crest, the internal tubercle, and the short heel.
I'^ig. 12. Inferior canine, antero-external view.
Fig. 13. Metalopliodon teslis Cope. Superior molar series, lacking p. m. i. Type specimen. Page 557.

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Bones of Conjplwdon anax. One individual, two-fifths natural size. Page 537.

Fi". 1. Lower jaw, symphysis .and part of left ramus, same as that figured on Plate XLIV e, fig. 6.

Fig. 2. Humerus, from front; a, distal view.

Fig. 3. Ulna, lateral view.

Fig. 4. Femur, anterior; <(, ili>t:il views.

Fig. .'i. Tibia represented on Plate XLVIII «. tig. 7, proximal view ; a, distal view.

U.S^GEOLOGICAL SURVEY OF THE TERRITORIES.

PLATE XLIV b

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PLATE. XLlVc.

Jaw acfl teeth of Coryphodon curHcrislii Cope, natural size; tvpii'al specimen found by J. L. Wort-
inau iu the Big Horn Basin, Wyoming. Pago 533.

Fig. 1. Peuultiniate superior inoUir, from Ijilow.

Figs. 2,3. Second and third superior premolars, from below.

Fig. 4. Superior incisors, external view ; the third remains iu place in the premaxillary bone ; the first

and second were found loose, but correspond to the alveoli.
Fig. 5. Superior canine, externa! side.

Fig. (i. Right mandibular rauuis, inner side ; a, the same, from above ; symphysis wanting.
Fig. 7. Basal part of inferior canine.
Fig.i. 8,9. Inferior incisors, extern.al views.

PLATE XLIVc^.

Bones of Bathmodon pachyims from the Big Horn River, two- fifths natural size. Page 549.

Fig. 1. Left humerus, anterior view ; a, posterior view ; 6, proximal view, restored from the second

specimen which is figured on Plate XLIV d; c, distal view.
Fig. 2. — Radius from below ; a, proximal extremity ; 6, distal view.
Fig. !.— Pisiform bone, from above.

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Figs. 1-4. — Teoili of Coryphodon rijiaiidu^. Frmii I he Bif; Horn region; uataral size. Page 532.

F:g. 1. — Last superior molar of lelt side, from below.

Fig. 2. — First true molar of left side, from lielovr; partly IVacturetl.

Fig. -i. — Lcfi preuuixillary bone witL (me incisor tooth; external view.

Fig. 4. — Last two iui'erior molars, from below.

Fig. .'). — Cori/phodon margiiiahis. Last superior molar of left .side, from below; a, auterior side. Page

Fig. G. — Corrpliodon aiiax. Part of left mandibular lamus of left side, with last two molar teeth, external
side; natural si;:e. From tlic jaw represented in Fig. 1, Plate XLIV6. Page .'■)37.

Figs. 7-13. — i:al inodoii pndiiipiis. Bones of specimen represented on Pl.ate XLIV</; two-lillhs natual
size. Page 5-!'J.

Fig. 7. — Condyle of nniudible, posterior view.

Fig. 8. — Os magnum from frout ; « aud b, lateral views; <■, iufeiior view.

Fig. 'J. — Left astragalus; a, inferior side ; /), internal ; c, external ; and d, anterior views.

Fig. 10. — Left calcaneum. from above ; a, from below ; b, internal ; c, external ; and d, anterior views.

Fig. 11. — Kight cuboid bone, from front; a, from above; b, from below.

Fig. 12. — Cuneiform bone, the posterior i>rocess broken off, from front; a, from below.

Fig. 13. — Metapodial boue ; a, posterior sid(^

Fig. 14. — Bathiiiodon radians. Astragalus of type specimen from Bear River, Wyoming, from below ; t wo-
tifths natural size. Page 544.

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Bones of the iudividual Conjphodon anax figured on PlateXLIVft; two-fifths natural size, except Fig.

I, which is natural size. Page 537.

Fig. 1. — Part of left mandibular ramus, internal view.

Fig. .2. — Axis, right side.

Fig. 3. — A sternal segment.

Fig. 4.— Proximal extremity of radius, sujierior view; a, proximal view

Fig. .''). — Right unciform bone, from below ; a, internal view.

Fig. 6. — Patella, inner side.

Fig. 7. — Tibi.a, from front ; a, from Ijeliind.

Fig. 8. — Head of fibula, proximal view.

Fig. 9. — Calcaneum, from above ; a, from below ; b, distal extremity.

Fig. 10. — Cuneiform front ; a, above ; b, from below.

Fig. 11. — Metapodial bone, from front.

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Bones of a second specimen of Bathmodon pachi/pm from the Big Horn region; two-flflhs natural size

Page 549.

Fig. 1. — Left innominatum, somewhat distorted, external view ; a, anterior edge.
Fig. 2. — Left femur, posterior view ; a, proximal extremity.

ii.s GK!)i..OGiCAL sumirr of the territories

PLATE XLIV*

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Figs. 1-3. — BalhmodoH radians, natural size. Page 544. These teeth accompanied the bones of the

limbs on which the species was established.
Fig. 1.— Last two superior molar teeth ; la, same, from inner side.
Fig. 2. — Posterior premolar ; 2a, from end ; 2i, from outside.
Fig. 3. — Anterior premolar, from above ; 3a, from end ; 36, from outside.
Fig. 4. — Premaxillury bone found with the preceding, from above ; natural size.
Fig. 5. — Preniaxillary tooth, probably of the preceding ; natural size.
Fig. 6. — Fragment of mandible witli the preceding; natural size.
Fig. 7. — Condyle of mandible with base of coronoid process from above.
Fig. 8. — .Supposed parietal bones, one-half natural size.
Fig. 9. — Inferior premolar.

PLATE XLVI

PLATE XLVI.

Fig. 1.— Maudible of Bathmodoti radians Cope, indiviilual figured ou Plate XLV; oue-lialf natural size,

in profile. Page 544.
Fig. 2. — Do. from above.
Fig. 3.— Symphysis of ? male, with largo canine alveoli, another individual from Bear River, Wyoniiug.

PLATE XLVII.

Figs. l-^.—Bathmodon radians Cope ; the separate pieces fouud together and apparently belonging to
the same animal as that figured on Plates XLV and XLVI. Page 544.

Fig. 1.— Left femur, one-third natural size, anterior view ; la, posterior view; 16, proximal end, one-
half nature ; le, distal end, one-half nature.

Fig. 2.— Proximal end of tibia, one-third natural size, from front ; 2«, from above ; 2b, from behind.

Fig. 3. — Distal end of fibula, one-half natural size, inner view; 3n, outer side.

Fig. 4.— Distal end of humerus, one-third natural size, anteroposterior view ; 4a, distal view.

Fig. 5. — Axis, one third nature, from .above ; 5a, from below.

Fig. 6. — Proximal end of humerus.

Fig. 7.— Astragalus perhaps of Coryphodon latipes Cope, from above; 7o, from below. From BcarEiver.
Wyoming. Page 526.

U S- GEOLOGICAL SURVEV OF THE TERRITORIES.

PI ,ATE XL; 11

TSmclao-i Son.Lith Philada

BATHMODON RADIANS.

PLATE XLVIII.

Figs. 1-6. — Bathmodon radians, specimen figured ou Plate XLV. Page 544.

Fig. 1. — Proximal portioD of scapula, witli margins partially bfoken off; la, glenoid cavity of the same.

Fig. 2. — Distal end of a scapula like the last; one-third natural size.

Fig. 3. — Proximal, and 3a, distal extremities of libula, one-third natural size.

Fig. 4. — Astragalus, from above, one-half natural size; 4a, same, from below; 46, from front; 4c, from

inner side.
Fig. 5. — Portion of sternum; one-half natural size.
Fig. 6. — Atlas, fractured, from hefore; 6a, do., from behind; 66, transverse process of right side, from

above.
Figs. 7-14. — Coryphodon latipes Cope, one-third natural size, except Fig. 13,_which is one-half, and Fig.

14, natural size; typical specimen. Page 5"i6.
Fig. 7. — Eight half of atlas, from the front; 7a, same, from above ; 76, same, posterior view.
Fig. 8. — Axis ceutrum, from above; Sa, same, from below.
Figs. 9-10. — Dorsal vertebra, anterior views ; a, lateral views.
Fig. 11. — Lumbar vertebra, from behind ; 11a, from below.
Fig. 12. — Proximal end of femur.
Fig. 13.— Astragalus, oue-half natural size, from above; 13a, from below; 136, from front; 13c, from

inner side.
Fig. 14. — Ungual phalange, natural size, from above; 14a, proximal view ; 146, inferior view.

us GPJOLOGICAL SURVEY OF THE TERRITORIKS

PLATE XV-All

.T.Sinclair iSon,Iiith Fhilada

1 "6. BATHMODON RADIANS '^ 14, CORVPHnnPN I.ATIPES

PLATE XLIX.

Figs. 1-3. — Metalophodon armatus ; dentition, natural size. Page 555.

Fig. 1. — Molar teeth of upper jaw.

Fig. 2. — Incisor teeth of the upper jaw (one of the incisors possibly of the lower).

Fig. 3. — Crowns of permanent teeth of the upper jaw, from a young animal.

Fig. 4. — Superior canine tooth, lacking the middle of the crown; a, inner side; i, transverse section.

Fig. 5. — Inferior premolars of No. 1, or No. 3.

Fig. C. — Inferior true molar of No. 3.

Fig. 7. ^Inferior canine of No. 1, or No. 3.

Fig. 8. — Cuneiform bone of ? Bathmodon ; a, sujjerior side.

Fig. 9. — Superior view of cranium of Limnohyus fontinalis Cope ; one-half uatural size. Page 707.

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Cranium and vertebral column of Hiiracotherititn renticolum. Natural size ; the specimen represented

on plate XLIX c. Page G35.
Fig. 1. — Cranium from below.
Fig. 2. — Cranium from above.

Fig. 3. — Mandible lacking right ramus from above.
Fig. 4. — The same as fig. 3 from below.
Fig 5. — Kight side of atlas ; imperfect.

Fig. 6. — Axis from front ; a, posterior, and b, inferior views.

Fig. 7. — Third or fourth cervical vertebra from front; a, posterior, and b, iuferior views.
Fig. 8. — First dorsal vertebra from front; a, posterior, and b, iuferior views.
Fig. 9. — A continuous series of fourteen dorsal and five lumbar vertebra;, seen from below.
Fig. 10. — Fifth dorsal vertebra from front ; n, from rear.
Fig. 11. — Eleventh dorsal vertebra from front ; b, from behiud.
Fig. 12b. — Fourteenth dorsal from behiud.

Fig. 13.— Sixteenth dorsal vertebra from front ; a, posterior extremity.
Fig. 14b. — Third lun.bar vertebra from behind.
Fig. 15. — Fifth lumbar vertebra, anterior view.

Fig. IG. — lieft mandihvdar ramus of Hi/racoiheriumangustidens var. A. Natural size, from above. Page 648.

■ICAl, SURVEY OF THE TEKf<lTORIES

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PLATE XL 1X6

Skeleton of Hyracotheriitin cetiiicolum. Figured iu plate XLIXfl, natural size. Page 635.

¥i<i. 1. — Glenoid extremity of scajiula.

Fig. 2. — Humerus ironi fiont; a, proximal extremity; 6, distal extremity.

Fig. 3. — Ulna and radius from the front ; a, from behind or helow ; 6, head of radius ; c, distal extrem-
ity of radius.

Fig. 4. — Eight anterior foot, anterior view ; «, jiroximal view of first series of carpal boui s ; b, distal
view of metacarpals.

Fig. 5. — Pisiform bone of the same foot, external view.

Fig. C. — First phal.ange of third digit, iiroximal extremitj'.

Fig. 7. — First pbahiuge of second digit, proximal extremity.

Fig. 8. — Ungual phalange of third digit, proximal view ; b, inferior view.

Fig. 9. — Eight femur, posterior view ; o.proxiiual view; b, distal extremity.

FMg. 10. — Eight tibia, anterior face ; a, posterior face ; b, proximal extremity ; c, distal extremity.

Fig. 11. — Astragalns and calcaneum in place, from above; a, from the inner side; b, distal or uavic-
ulo-cuboid extremity.

Fig. 12. — Eight posterior foot from the front ; a, from the inner side ; 6, distal views of third and fotirth
metatarsals.

Fig. 13. — First ]>halange of middle digit, proximal vi«w; a, distal extremity.

Fig. 14.^Second phalange of third digit, proximal extremity.

Fig. 15. — First phalange of second digit, proximal extremity.

Fig. Ifi. — Second phalange of second digit, proximal extremity.

U. S. GEOLOGICAL SURVEY" OF THE TERRITORIES.

RATE XLrX.

' Sinclair k Sor. Lith ?hi-a5'^

HVRACOTHEP.IUM VENTICOLUM COPt:

PLATE XLIXc.

Sjiraeofherium venticoliim Coyte. Skeleton restored, two-fifths natural size Page 635.

PLATE L.

Fig. 1. — Crauium in front of mastoid process of Palaeosyops laevidens Copi'. Oup-half natural size.
Page 701.

Fig. 2. — Maxillary and canine teeth of tlic right side, from below, natural size. The matrix was not
removed from the inner side of the preiiinlars when this plate was drawn. The second has aa inter-
nal lobe as usual.

Fig. 3. — Maxillary teeth of another iudividual (from Mammoth Buttes), natural size.

Fig. 4. — Right side of parts of cranium of Limnohyus fontinalis. One-half n.itural size. Page 707.

us GEOLOGICAL, SURVEY OF THE TERRITORIE'S

PLATE L

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,PAL/\E03Y0PS LAEVIDENo Vi. 4.LIMNOHYUS FOKTINALIS Va

PLATE LI.

Fig. 1. — Maxillary teeth ot Palaeos\jops vaUidcns Cope. Natural size. Page 699.
Fig. 2. — Maxillary teeth of Palaeosyops major Leidy. Natural size. Page 661.
Fig. 3. — Maxillary teeth of iiniHoAi/Hs (fiaroniis Cope. Natur.al size. Page 70G.

PLATE LII.

Figures all oue-half natural size, ext;e[)t Fig. 6.

Fig. 1. — Mandible jjf Palaeosijops major. Page 701, superior view.

Fig. "2. — Superior view of Fig. 1.

Fig. 'A. — Mantlible of Palaeosyops valUdens, figured in Plate LIII, page 699, superior view.

Fig. 4. — Superior molar tooth of jEf2/racfii/M« ^jrijicfps. From South Bitter Creek, Wyoming. Page 661

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Fig. 1. — Left mandibular ramus of PuVaeos;/o^w valUdens. Oue-half natural size ; profile. From Mam-
moth Buttes, Wyo. Page 699.

Fig. 2. — Hyrachyus eximius. Mandibular right ramus of individual figured in Plate LVIIa, figs. 6-7 i
2a, same, from above. Page 662.

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Skeleton of Hyraohyus eximius restorpfl. Natural size ; specimen figured on two succeeding plates.
From near Fort I!ri<lncr. \V\oiiiiiit;-. Page 662.

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Hyrachyus eximius. Parts of a sinj^le skeleton, two-thirds natural size. Page 662.
ri^. 1. — Humerns, inner side ; a, anterior view ; 6, distal extremity.
Fig. 2. — Left ulna and radius, anterior view.
Fig. 3. — Carpus and part of metacai-piis of left side, front view.
Fig. J. — Distal view of distal facets of second series of carpal bones.
Fig. 5. — Proximal view of metacarpals of left side.

Fig. 6. — Right tibia and fibula, anterior view ; a, posterior view ; h, proximal extremity ; c, distal ex-
tremity.

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All the figures two-thirds natural size.

Figs. 1-5. — Hyracliyus eximius. Part of the skeleton figured on Plates LIV and LV. Page 662.

Fig. 1. — Left half of the pelvis, with three lumbar vertebrae, from below.

Fig. 2.— Left posterior foot, front view ; a, from behind ; b, distal extremities of metatarsal bones.

Fig. 3. — Distal extremity of astragalus and calcaneum together.

Fig. 4. — First phalange of median digit, proximal extremity.

Fig. 5. — First phalange of digit, proximal extremity.

Figs. 6-9. — Triplopus amurornm. Part of the skeleton represented on Plate LVId. Page 687.

Fig. 6. — Distal extremity of tibia and fibula.

Fig. 7. — Tarsus, anterior view ; a, posterior view.

Fig. 8. — Distal extremity of astragalus and calcaneum.

Fig. 9. — Distal view of second row of tarsal bones.

Figs. 10-1'2. — Triplopus viibitalis. Parts of skeleton figured on Plate LVId. Page 679.

I ig. 10. — Atlas, from lielow.

Fig. 11. — Axis, from below.

Fig. la. — Two consecutive cervical and two dorsal vertebrae, right side, with head of humerus.

lis GEOL.OGIC.^i SHR\E'y' OF THE TEFIRITORIFJS.

PI_.A'"rE LV.a,

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HYRACHYUS. E>:iMITJS h. 6-9 TRIPLOPUS ATvTARORUM % 10-12 T. CUBITALIS %

PLATE LVI.

Jaws of Perissodactyla. Natural size.

Fig. 1.— Part of skull of Systemodon tapirinus Cope, obliquely distorted by pressure, with mandibular

ramus not distorted, from right side; a, maxill.ary bone, from below; b, niaudible, from above.

Page 019.
Fig. 2.— Syuiphysis and part of ramus of mandible of a second individual of Systemodon tapirinus, left

side ; a, from above. The posterior inferior molar on anotlicr part of the ramus is preserved, but

not figured. Page 619.
Fig, 3. — Systetiwrloii srmihiaiis. Superior molars ami canine, from l)elow ; molars worn. Page (522.
Fig. 4. — Supposed mandililo of Systemodon scmihians, from left side ; a, from above. Page 662.
Fig. 5. — Systemodon etsagicua. Part of mandibular rauuis, external view ; a, from above.
Fig. 6. — Heptodon posticus. Left mandibular ramus, internal side; a, from above. Page 654.

us, GEOLOGICAL SUR^/E^' OF THE TERRITORIES.

PLATE LVl

1-2 .SYSTEMODON TAPIRINUS 3-4 S.SEMIHIANS 5 S ETSAGICUS 6 HEPTODON

POSTICUS

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PLATE LVIa.

Boucs of Triplopiie cubitalis Cope; twotbirds natural size. Portiuus of one skeleton; other parts of the

same are figured on Plate LVa. Page G97.
Kig. 1. — Skull, riglit side; n. same from above; 6, same from belovr, a part of the right mandibular

ramus removed, showing two permanent premolars not fully protruded.
Fig. 2.— Portion of riglit ramus of mandil)le, showing inferior mol.ars.
Kig. 3. — Block of matrix containing the left anterior limb entire, lacking only the scaphoid bone and

four phalanges; external view.
Pig. 4.— Distal view of ulna and radius of this ))iecc.
pig. i'l. — Pes of the same limb viewed from the front.
Pig. G. — Pisiform bone, i'xiernal view.
Pig. 7. — Distal ihces of second row of carpal bones.
Fig. 8. — Left humerus, anterior view of disial extremity.
Pig. y. — Ulna and radius of left side, from the front.
Fig. 9 a. — Proximal view of bead of left radius.
Fig. W.—LamhclothirUim hruicniuiiuiii. Part of left ramus of mandible with symphysis, two-thirds

natural size. From the Wind River Basin. Page 709.

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PLATE L V 1 1 .

Achaenodon iveolens Cope, mandible, two-thirds uatural size. Upper figure, left ramus, external view,
lower figure, right ramus, internal view. Typical specimen from South Bitter Creek, Wyoming
Territory. Page 343.

PLATE LVIIa.

Maodible of Achaetiodon inaolens, from individual represented on preceding plate. Two-tbirds natural

size. Page 343.
Fig. 1. — Superior view.
Fig. 2. — Inferior view of right ramus.

11 S GEOLOGICAL SUR.-'Sri' OF TdE TEFlRITGPJE

:^i*?c'a-.r A Son Liih i ■• -

ACHAENODON" INSOLENS COPE. V4.

PLATE LVII6.

Phenacodue primaevus Cope. Part of an entire skeleton represented on plate LVUe. Page 435.

Fig. 1. Skull, natural size, from below.

Figs. 2-6. — A cast of the brain cavity of the above skull, natural size.

Fig. "2. — Lateral view; a, superior; 6, inferior; c, anterior, and d, posterior views.

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Cranium of tlie specimen of Phenacodiis ijrimwvus, figured in Plate LVII b, two-thirds natural size.

Page 435.
Fig. f.— Right side. ,

Fig. 2.— Top of skull.
pjjr. 3. — Superior view of mandibular ramus; a, inferior view of same; 6, posterior view.

US GEOLOGICAL SURVEY OF THE TERRITORIES

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PLATE LVlld.

Feet of PhtnacoduajniiHaevus, two-thirds natural size ; iudividual figured on preceding plates. Page 435.

Fig. 1. — Anterior foot, anterior view ; b, posterior view.

Fig. 2. — Proximal view of first row of tarsal bones.

Fig. 3. — Proximal view of second row of tarsal boues.

Fig. 4. — Posterior foot from front ; a, from behind.

Fig. 5. — Uistal end of astr.agalus and civleanenm.

Fig. 6. — Proximal view of cuboid and the three cuneiforms.

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PLATE LVIIe.

Skeleton of rhenacodiis primaeviis. One-third uatiiral size. Page 435. From the Big Horn.

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PLATE LVII/.

Mammalui tt-om the Puerco lioceue, uatural size.

Figs. 1, 2. — ririptjickus rhabdodon ; 1, maxillary boup with six molars; 2, right ramus of iiiaudilile with

six molars, the second injured. Page H91.
Figs. 3, 4. — Mioclanius turgidus, typical specimens. Fig. 3, fourth premolar and first and second true

molars of the upper jaw; fig. 4, part of right mandibular ramus, external view; a, superior view

Page -i-ih.
Fig. 5. — Miodwiius sHfc(n;;oHHS, palate with fourth superior premolar, aud anterior two true molars, from

below; typical specimen. Page 338.
Fig. 0. — Haploconus ainjustus, part of left mandibular rauuis, external view; n, suj)erior view. Type

specimen. Page 41G.
Fig. 7. — Mioclamiis nandihularin. Slaudibular ramus, drawn I'roni two fragments, seen from above.

Page 339.
Figs. 8, 9. — Jaws and teeth of a single individual oi Fheiiacodus i>ncrctnsrs, uatural size; type specimen;

8, maxillary bone, with first and second true molars, from below; 9, right mandibular ramus,

inner side; 9a, the same from above. Page 488.
Fig. 10. — Phenacodita zuniensis, imperfect mandibular ramus, inner side; a, from above. Page.491.
Figs. 11, 12. — Profoffonia SM6(;»ad/a/«, jaws of two individuals; type specimens. Page 426.
Fig. 11. — Palate, with left fourth premolar and first two true molars; fig. 12, last two inferior molars

from above.

U S. GEOLOGICAL SUE^VEY" OF THE TERRITOfOES,

PLATE L\l]f

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1-2.CATATHLAEUS RHABDODON . 3 -4-.MI0CLAENUS TURGIDUS. 5 , M.SUBTRIGONUS. 6.M.ANGUSTUS,
7.M,M.ANDIBULARIS. 8-9.PHENACODUS PUERCENSIS 10. PZUNIENSIS . 11-12 . PROTOGONIA SUBQUADRATA .'

PLATE LVI1\^.

Bones of I'liauHudus i/riwwvus and /'. iiuiiicnus, iVom the Big H<im basin, two-thirds the natural size.
Those of/', primacviis I'roin tlic individual ii;,nirod on Date LVII c.

Figs. 1-6. — riiciiacudns priiimevun.

Fig. 1. — Glenoid cavity of scapula.

Fig. 1. — Right humerus, posterior view ; <i, anterior view ; b, proximal vi<nv ; r, distal view.

Fig. 3.— Proximal extremity of radius, t-oi:i lielow ; a, proximal view.

Fig. 4. — IJlua and radius, distal view.

Fig. 5.— Tibia of another individual mentioned in the text, page — , as No. :J. This tibia a half inch
longer than that of ilie specimen of LVII (, but is identical with it in a!l other respects. Fig. .'>,
proximal view of head ; o, distal view of distal end, the internal malleolus broken otf.

pi„, 0.— Heail of right femur, showing oval fcn-iii of head ; seen also in F. jcoiliiunii.

Figs. 7-8. — I'liciiacodus miiiieiiiis.

Fig. 7. — Glenoid cavity of scapula.

Fig. 8. — Left humerus, from behind ; ft, from the inner side ; b, proximal \iew.

U.S. GEOLOGICAL SURVEY OF THE TERRITORIES;

PLATE LVIl

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PLATE LVIIA.

Figs. I-IG.—Phenacodiis primaevus, from the specimen figured LVII e; two-thirds uatural size.

Figs. 1-5. — The first five cervical vertebrie, from below ; a, jjosterior views ; 6, anterior views.

FigH. 6-7. — Eleventh and twelfth dorsal vertebne from below; ft, anterior view of the eleventh, with a

fragment adhering to the neural arch.
Figs. H-11. — Last dorsal and first three liuul>ar vertebra; from below; a, i)osterior views; ft, anterior

views.
Figs. l-i-l;j.— Last two lumbar vertobraj from below; a, posterior view of last lumbar.
Fig. 14. — Sacrum with right ilium and parts of ischium and pubis from below.

Figs. 15-16.— Two adjacent caudal vertebra;, the fourth and fifth from the sacrum; fi, anterior view.
Fig. 17— Phenacodus vorimani, left tarsus of specimen figured in Plate XXIX e, exterior side, two-thirds

natural size; a, proximal oxfremities of the metatarsals.

II S GEOLOGICAL SURVIT QF THE TERRITORIES

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PLATE LVIII.

All the figures natural size.

Figs. 1, 2. — Hyraeotherium craspedoium. Page 631.

Fig. 1. — Cranium viewed from below.

Fig. a. — Right inaudible of a second specimen, the one on which the species was determined; inner

side; a, from above.
Figs. 3-5.—Lambdotheriumpopoagicum. Parts of several indivi<luals. Page 710.
Fig. 3.— Superior molars of left side; a and c, from the individual tigured in Fig. 4; b, from a second

animal.
Fig. 4. — Superior molars of right side.
Fig. b.—Hepiodon ventorum, left mandibular ramus of left side, witli the last inferior molar of specimen

No. 2 added in place. Page 654.
Figs. 6, T.—Hyrachijus impUcatus Cope. Part of skull, from the Mammoth Bnttes; right side; a, right

maxillary teeth from below. Page 676.
Fig. 7. — Eight mandibular ramus from above.

Figs. Sr-10.—Phenacodu9 vortmani. Three individuals ; from the Wind River bad lands. Paga 464.
Fig. 8. — Last two inferior molar teeth in portion of jaw, from above.
Fig. 9. — Anterior part of m.andible from above, of the specimen on which the species was based ; a,

inner view of same.
Fig. 10. — External view of maudible of a third individual.
Fig. 11. — Phenacodus var. trilobatus, type, inner view ; a, superior view.

U. S GEOLOGICAL SlIRVE?i^ OF THE TERRlTQREe

p]^\TE LVlll

1-2 HYRAGOTHERIUM-S-^LAMBDOTHERIUM. 5.PACHYN0L0PHUS . 6 -7-HYBACHYUS .a

T Smclair i Sonlith Philada
ACODUS

PLATE LVIIIa.

Fig. 1. — Dathyopsisjisddtns. lucisor tootli, found with inferior molars; natural size. Page o97.

Fig. 2. — Triplopus amarorum. Cranium of specimen represeuteil in Figs. 6-9, PI. LVrt, two-tbiril.s nat-
ural size; from above; «, from below. From South Bitter Creek. Page (387.

Fig. 3. — Maxilliiry teeth of right side of I'liUvomjops hortulis. From the Wind River, Wyoming; natural
size. Page 703.

Fig. 4. — Eight maxillary and malar bone.s of Llmiiohiius fviilhinliv. .Specimen figured on PI. XLIX,
Fig. 4, natural size; seen from Ijelow. Page 707.

Fig. 5. — Postzygomatic part of same eraiiiiim seen from below ; one-half natural size.

Figs 6, 7. — Atlas and axis of the specimen of Ejirarhiiiis tximhis, whose mandibular ramus is repre-
sented in Fig. '2, PI. LII; 5a, from above; 'il>, from below ; (i, left side; (ia, fiom front.

Figs. 8-16. — Vertebra^ of snakes from the White River beds of Northeasteru Colorado, excepting Figs.
10-13, which are from Oregon.

Figs. 8, 9. — Xeurodromiciis dorisalh. Page 786.

Fig. 8. — An anterior vertebra, natural size ; from behind.

Fig. 9. — Same; same view | natural size, o, same from front ; i, side view of same ; c, inferior view
of same, same size, J nature.

Figs. 10-13. — Ogmoplns oret/onensis. Typical specimens, from the John Day's River, Oregon. Page 783.

Fig. 10. — An anterior centrum, natural size, from behind.

Fig. 11. — Two consecutive vertebrae, twice natural size, left side ; a, superior view ; h, inferior view of
posterior centrum, natural size.

Fig. 12. — Another vertebra, inferior view, natural size; a, the same from front.

Fig. 13. — Ogmophis angulatus. Dorsal vertebra, twice natiira! size, leit side ; u, i>osterior view ; c, infe-
rior view. Page 783.

Figs. 14-16. — Calamagras miirironis. Vertebra', twice natural size. Page 784.

Fig. 14. — Posterior .series, .slightly larger than the iinteriur, Fig. 15, or than Fig. 16 vertebne from the
anterior part of the column. Fig. 14 a, lateral view of 14; 15a, lateral view of 15.

Fig. 14 6. — Po.sterior extremity of last vertebra of 14; 16a, posterior view of posterior vertebra of 16.
166, anterior view of anterior vertebra of 16. From N. E. Colorado.

U, S GEOLOGICAL SURVE^^ OF THE TERKTORIES.

PLATE LViU ,

i- -sijicjajr i; b3n.l-iti\ Piuiada.

LBATHVOPSIS FIS SIDENS .2 . TRIPLOPUS AMARORUM . 3 . PALAEOSYOPS BOREALIS
4-5 LIMNOHYUS FONTINALIS - 6-7 HYRACHYUS EXIMIUS . 8-9 . NEURODROML: V :t
10-13 OGMOPHIS. 14-16. CAL.AMAGRA.S .

PLATE LVIII6.

Fig. 1. — Mesonyx laiiius, proximal view of proxiuial scries ol carpal bones of the riglit side of the imli-

viilual figured in Plate XXIX; natural size. Page 356.
Figs. 2, 3. — Skull of Ictops fcicHspis from the Wind River Basin, Wyoming. Page 2(i6.
Fig. 2. — Oblique view of right side, natural size; a, left mandibular ramus, inner side.
Fig. 3.— Oblique inferior view, one-third larger than nature; a, left ramus of mandible, from above.
Figs. 4, b.—Heptodon veiitorum. Two individuals from the Wind River Basin; natural size. Page 654.
Fig. 4. — Left maxillary bone, with molar teeth and alveolus of canine, from below; a, from right side;

ft, last inferior molar, lacking anterior lobe, from above.
Fig. 5. — Last inferior molar of a second individual, from above.
Fig. 6.— Right mandibular ramus oi Ueptodon calcicnlus, right side; a, from above; natural size. From

the Wind River Basin. Page 656.
Fig. 7. — iamftdo<fcm«mjJo;)oa(;reMni, left ramus mandibuli. outer side: a, from above; naturalsize. Wind

River Basin. Paga 720.

LI S GEOLOGICAL SURVEY OF THE TERRrrORIES-

PLATE LVIlf b

T SmoUlT St Son, Lilh PKila

1 MESONYX LANIUS. 2-3,ICTOPS BICUSPIS. 4-S HEPTODON VENTORUM
6. HXALCICULUS . 7. LAMBDOTHERIUM POPOAGICUM .

PLATE LIX.

Spi'cimeus from the Amyzon shales of South Park, Colorado, and from Osino, Nevada, natural size.

Fij;. l.—Amia dictijocephaUi. Left side. One of the types from Florissant, Colorado. Page 745.

Fig. -i.— Amazon meiitale. One of the types from Osino, Nevada. Page 749.

Fig. 2. — Tricho])hanca liians. Types from Osino, Nevada. Page 753.

r\'^. i.—Triclwphanes foUaram. From Florissant, South Park, Colorado, type; 4a, scales enlarged.

Page 7r>:!.
Fig. b.—Charadi-iua sheppardianii8. From Florissant, Colorado. Discovered by Dr. Hambacb. Page 755.

U.S. GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE LIX

T Sinclair St Son, LitK PKiU

l.AMIA DICTY0CEPHALA..2 AMYZON MENTALE 3 , TRICHOPHANES HIANS 4 TRICHOPHANES FOLIARUM,

5.CHARADRIUS SHEPPARDIANUS .

PLATE LX.

Fig. 1. — Amia scutafa. Typical si^ecimeu, natural size; from the Amyzon shales of South Park, Colo-
rado. Page 745.
Fig. 2.- — Jmi/zoii metUah: Second speciraeu from the Aiuyzou shales, 20 miles north of Osino, Nevada;

natural size. Page 749.
Figs. 3-21. — Bones of LaceriUia and Ophidia, from the White River beds of Northeastern Colorado.
Figs. 3-11. — Peltosaurus granulosus. Typical specimen, natural size, escei^t figs. 5,6, and 11, which are

twice natural size. Page 773.
Fig. 3. — Cranium restored in outline, showing superior faces of parietal, frontal, premaslllary, maxil-
lary, and malar bones.
Fig. 4. — Inferior side of frontal bone.

Fig. 5.— Maxillary teeth, from below, twice natural size ; a, end of the same.
Fig. C. — Eight maudil)ular ramus, lacking the posterior third, inner view; o, internal view ; /<, snpe- .

rior view, showing edges of crowns of teeth of distal part of dentary bone, twice natural size.
Fig. 7. — Left mandibular ramus, inner side.
Fig. 8. — Anterior vertebra, from behind.

Fig. 9. — Dorsal vertebra, side view ; a, inferioi-, I, anterior, and c, posterior views.
Figs. 10, 11. — Dermal scuta of the body ; the smooth ones are seen from below.
Figs. 12-14. — Eiosiinus serratiis, twice natural size. Page 776.
Fig. 12. — Frontal bone from above ; a, from below , h, anterior view.
Fig. 13. — Post-frontal bone, external face.
Fig. 14. — Ramus of mandible with teeth, internal view.
Fig. 1.5. — Acdprion fonnosiim. Ramus of mandible, twice natural size, inner view; a, external side.

Page 776.
Fig. 16. — Cremastosaurus carinicolHs. Anterior five vertebrie, including axis, twice natural .size, from

above; a, from below ; 6, posterior view. Page 781.
Fig. 17. — Plati/rhacliis coloradoens's. Type; vertebra; seen from above twice natural size; a, the left

side; 6, posterior view. Page 778.
Fig. 18. — Plafi/rliachh rhambastes. Dor.sal vertebne of two individuals, twice natural size ; right side of

one individual; n, inferior side of the same; i, posterior view of the same; c, anterior view of

another. Page 779.
Fig. 19. — Plati/rhacliis rinipeclaUs, Sacral vertebra, anterior view; a, sui^erior view, the neural arch

being absent ; i, inferior view. Page 779.
Fig. 20. — Diaciumsesquipedale. Sacral vertebra, from above ; the posterior part of the neural arch broken

away ; a, anterior ; fc, lateral, and c, inferior views. Page 777.
Fig. 21.— Aphelojjliis tal2)ivvrus. TyiJical specimen ; three dorsal vertebra?, left side ; a, inferior side ; b,

anterior view ; c, posterior view. Page 782.

U,S GEOLOGICAL SURVEY OF THE TERBJTORIES

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17-19. PLATYRHACHIS. 20 DIACIUM 21 APHELOPHIS .

P L A T E L X I .

TrstuAUiata from the White River formation, one-thirtl natural size. Page 762.
Fig. 1. — Testiido hitkiineiis. Tyjie, from above ; a, from below. Page 765.

Fig. '2. — Testudo Vqionius. Type, clavicle ( " episternal ") from above ; a, the same, inner edge. Pago 766.
Fig. 3. — TesUido Uijoiniis. Part of nuchal vertebral bone of same specimen, from above. Page 766.
Fig. 4. — Testiido amphithorax. Plastron from below ; the parts separated by the hyo-hyposternal suture,

from different individuals. Page 767.
Fig. 5. — Tesliido qitadratiis. Lip of plastron, from below. Page 7(54.

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PLATE LXII.

Figures oi iiortious of skeletons of insectivorous MammaVui froni the White River beds of Colorado;

natural size, or twice natural size.
Figs 1-9. — Fcrathfrium J'ufiax Cojie. Pa.ge 794.

Fig. 1. — Anterior portion of skull, natural size, left side ; a, sujierior side.
Fig. 2. — The same .skull, twice natural size, the right side; a, from below.
Fig. 3. — Kight ramus of the maudible, lacking both extremities, natural size, the iiuier side.
Fig. 4. — The same ramus, twice natural size, the outer side ; a, the inner side ; b, from above, showing

coronal .surfaces of teeth.
Fig 5. — Right ramus of the mandible of another individual with extremities wanting, natural size.
Fig. G. — The same ramus, twice natural size, external side ; a, inner side; 6, from above.
Fig. 7. — Right ramus inaudibuli of another individual, twice natural size, external side ; a, inner side.
Fig. 8. — Portion of right mandibular ramus of another individual, twice natural size, external side ; a,

exhibiting canine in jdace ; h, from above.
Fig. 9. — Superior view of a portion of another right ramus, with some of the anterior teeth missing

twice natural size.
Figs. 10, 11. — Ferntkerhim tricusjtis Cope. ' Page 796.
Fig. 10. — Posterior portion of left ranjns of the mandible, natural size.
Fig. 11. — The same, twice natural size; a, the inner side ; h, from above.
Figs. 12-16. — Peratheriiim htintii Cope. Page 796.
Fig. 12. — Portion of left ramus, natural size.

Fig. 13. — The same fragment, twice natural size, external side ; a. inner side ; 6, from above.
Fig. 14. — Portion of right ramus of another individual, twice natural size ; a, inner side ; b, from above.
Fig. 15. — Anterior portion of right ramus of a 1 bird individual, external side, natural size ; a, the same,

twice natural size, inner side.
Fig. Ki.^Auterior portion of the right ramus of a fourth iudividiuil, the inner side; o, the superior

aspect.
Fig 17. — Posterior portion of left mandibular ramus of rcralheriiim scniare Cope, natural size, external

side. Page 798.
Fig. 18. — The same fragment, twice natural size, external side ; a, internal aspect ; b, from aljove.
Figs. 19-21. — Peratheriiim inarginale Cope.

Fig. 19. — Posterior part of right mandibular ramus, ratural size, outer side.
Fig. 20. — The same, twice natural size ; a, inner side ; b, superior view.
Fig. 21. — Median portion of rannis of a second individual, external view; a, internal view.
Figs. 22-24. — Peralherium alternans Cope. Page 799.
Fig. 22. — Portion of left mandible from the inner side, natural size.

Fig. 23. — The same, from the inner side, twice natural size ; a, exteinal side ; b, from above.
Fig. 24. — Middle portion of ramus of another individual, left side, external view, twice natural size.
Fig. 25. — Posterior portion of riglit mandible of Uomnhia yrnilata Cope, natural size, seen from the outfcr

side. Page 810.
Fig. 26. — The same ramus, external view, twice natural size; u, the inner side; b, molar, coronal sur-
face.
Fig. 27. — Eight mandibular ramus, posterior portion, of Ihmnina crassiyenis, seen from outer side.

Page 811.
Fig. 28. — The same fragment, twice natuial size, outer side ; a, inner side; b, from above.
Fig. 29. — Corresponding ramus of the left side, seen from above.

Fig. 30.— Anterior part of skull, chiefly the muzzle, the right side, natural size ; a, the same, from above^

of Geolabis rhynchccus Cope. Page 808.
Fig. 31. — The same muzzle from the right side, twice natural size.
Fig. 32.— Cast of the frontal and facial regions of the sknll of the Geolaiis rhynchaeus, second specimen,

natural size, from the right side; «, from above ; b, from below. Page 808.
Pigs. 33-50. — Portions of five individuals of Mesodecies caniciilus Cope. Natural size (except tig. 39).

Page 805.
Fig. 33. — Posterior portion of left mandibular ramus, outer side ; a, from below.

Fig. 34.— Middle of right ramus accompanying the last figured specimen, showing the partially pro-
truded last premolar, from the external side ; b, from above.
Fig. 35. — Portion of right ramus of a second individual containing the deciduous last premolar, outer

side ; a, inner side ; b, from above.
Fig. 36. — Posterior portion oif left ramus of a third individual, outer side ; b, from above.
Fig. 37. — Anterior portion of left ramus accompanying Fig. 36, without teeth, inner side ; b, from

above.
Figs. 38-41. — Fragments of one individual.
Fig. 38.^Portion of right maxillary bone containing last premolar and first true molar, natural size,

seen from below ; a, the external side.
Fig. 39. — The same specimen, twice natural size, from below.

Fig. 40. — Median portion of left mandible, natural size, external view ; b, superior view.
Fig. 41. — Anterior middle portion of right ramus, external view; displaying permanent last premolar

below the correspoudiug deciduous tooth ; a, inner side of the same.
Figs. 42-50. — Fragments of the skeleton of a fifth individual.
Fig. 4'2. — Postorbital portion of skull containing cast of the brain, which is exposed by the partial

removal of the superior walls, left side ; a, superior ; b, inferior, and c, posterior views.
Fif. 43. — Portion of the left mandibular ramus displaying the coronoid process, outer side; a, inner

side. The deciduous last jiremolar remains.
Fif. 44. — The axis and three succeeding cervical vertebra! lying attached by their inferior aspects to

the posterior face of the atlas, seen from the left side ; a, the same, seen from the front of the atlas;

b, the same, seen from above the axis ; c, posterior view of the mass.
Fie. 45. — A dorsal vertebra without the apex of the neural spine, from the left side; a, anterior, and b,

posterior views.
Fig. 46. — A series of four consecutive dorsal vertebrie a little dislocated, and joined with several ribs,

including the first, seen from the right side ; a, the same seen from the left side, and displaying the

ribs ; b, the same seen from below ; c, anterior view.
Fig. 47. — Praesternum left side ; a, from above ; b, from below ; c, from the front ; d, from behind.
Fig. 48. — Scapula from the posterior edge ; a, the glenoid cavity.
Fig. 49.— Proximal half of humerus ; a, inner side ; b, proximal extremity.
Fig. 50. — Distal extremity of humerus, anterior aspect ; a, posterior side.

US. GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE LXII

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MARSUPIALIA, BUNOTHERIA and CHIROPTERA.

PLATE LXIII.

Figs. 1-3. — 2'estudo cultralus. One-balf uakiral size. Page 7G3.

Figs. 1-2. — Parts of carapace and plastron of one individual.

Fig. 1. — Rigbt lialf of lip of plastron viewed from above.

Fig. 2. — Posterior part of left side of margin of carajiace, including tbe anal bone and iiart of tbe la.st

marginal of tbe rigbt side.
Fig. 3. — Left half of lip of plastron of a second individual, sbowiug a fissured cbaracter, seen from

above ; a, tbe external or internal side.
Fig. 4. — Left mandibular ramus of Sciuriis rorlmani, left side, natural size; a, tbe same from above.

Page 816.
Fig. 5. — Sciurus hallorianus. Skull, from above, natural size; a, .second and tbird molars of rigbt side,

from below, twice natural size. Page 818.
Fig. 6. — Sciurus balloHaiius. Rigbt ramus of mandible of skull above figured, natural size, external view ;

a, .same from above, twice natural size. Page 818.
Figs. 7-10. — Meiiiscom !/s liijtpodHs. Several individuals. Page 828.
Fig. 7. — Base of cranium, natural size; several of tbe molar teetb are copied in from another specimen

witb both series complete, and connected by a perfect palate.
Fig. 8. — Eight mandibular ramus of a second individual, natural size ; a, tbe same, iuuer'Bide; b, tbe

same from above, twice natural size.
Fig. 9. — Rigbt superior molar series, twice natural size, from below ; a, external side.
Fig. 10. — Skull lacking all behind orbits of a fourth individual, natural size, right side; a, above; 6,

front.
Fig. 11. — Meniscomys liolo})Iius. Left maxillary series of molars, twice natural size, from below; «, ex-
ternal side. Page 829.
Fig. 12. — Meniscomi/s carafua. An imperfect cranium seeji from below, natural size; n, from above.

Page 830.
Fig. 13. — Left mandibular ramus of specimen figured as above, from outer side; <(, same, seen from

above, twice natural size.
Fig. 14.— Superior molar teetb of tbe .same specimen, from below, twice natural size; a, external side.
Fig. 15. — lemur of the same specimen, from front, natural size.
Figs. 16-17. — ileniscomi/s nitens. Two individuals. Page 832.

Fig. 16. — Second and third superior molars, twice natural size, from below ; a, external view.
Fig. 17.— Part of right mandibular ramus, natural size, inner side; a, the same, from above, twice nat-
ural size.
Figs. 18-21. — Castor jifninsulatus. Two individuals, natural size. Page 840.
Fig. 18. — Cranium from left side; n, same, from above; 6, from below; c, posterior view.
Figs. 19-21. — Portions of a second individual cut froju a single small block of matrix.
Fig. 19. — Eight ramus of maudible, external side; a, from above.
Fig. 20. — Right femur, front view.
Fig. 21. — Right tibia with part of shaft and peroneal process of distal extremity wanting, natural

size, jjosterior view ; a, external side.
Fig. 22. — Castor gradatus. Skull, from above; n, from below, natural size. Page 844.

U S GEOLOCJCAL SURVEY OF THE I'KRRlTOFaES

PLATE L>an

T Sinclair i Sonliitli Thilada

1-3,TESTUD0 CULTRATUS. 4 .3CIURU3 WORTMAI-41 . 5-6, S . BALLOVIANUS . 7-10 MENISCOMYS HIPPODUS.
llMT,inLOPHUS.i2-15 M CAVATUS 16-17, M.NITENS . 18-21 CASTOR PENINSULATUS , 22 .C.GRADATUS.

PLATE LXIV.

Bodentia, natural size, except fig. 10c = | natural size.

Fig. 1. — Entoptychus planifrons. Skull, right side ; a, same, from above ; b, from below ; c, posterior
vieTv ; d, right ramus of maudible from above. Pago 838.

Fig. 2. — Entoptychus lamhdoideus. Cranium ■without muzzle or occiput, from left side; a, from above;
h, palatal aspect. Page 860.

Fig. 3. — Entoptychus minor. Cranium; a, from above ; i, from below. Page 861.

Fig. 4. — Entoptychus cavifroiis. Skull, from above. Page 862.

Fig. 5. — Entoptychus crassiramis. Skull, right side; a, from above; d, right ramus of maudible from
above. Page 864.

Fig. 6. — Pleurolicus sulcifrons. Cranium, right side ; a, from above ; fc, from below. Pago 867.

Fig. 7. — PlmiroUcns leptophrys. Skull, left side ; a, from above; J, from below. Page 868.

Fig. 8. — Pleurolicus teptoplnys. Left side of anterior half of cranium ; 6, same, from below. Page 868.

Fig. 9. — Phurolicus diplophysus. Posterior half of skull ; a, from above ; c, posterior view. Page 869.

Fig. 10. — Paciculus lockingtonianus. Eight side ; a, from above; 6, from below ; rf, anterior view; c, su-
perior molars worn masticating surfaces showing inflections. Page 884.

Fig. II. — Lepus mnisianus. Skull, left side ; a, from above. Page 886.

(J, 5 GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE LXr/

I Saiclair k Scn.Uih Phiiad.

1 ENTOPTYCHUS PLANIFRONS. 2.E.LAMBD0IDEUS . 3 .i; ,M INOR^ 4 E .CAVIFRCNS , o.E.CRASSIRAMIS.
6 PLEUROLICUS SULCIFRONS 7-8,?. LEPTOPHRYS. 9 P DIPLOPHYSUS .
10 PACICULUS LOCKINGTONIAMUS. ll.LEPUS ENNISIANUS

PLATE LXV.

Fragments of skeletons of Bodentia, mostly twice natural size.
Figs. 1-13. — Eumys elegans. Leidy. Page 849.

Fig. 1. — Anterior part of cranium from above, natural size ; h, from the front.
Fig. 2. — The same cranium from below, twice natural size (linear).
Fig. .3. — Anterior part of cranium of a second individual, from above ; one side of muzzle injured ; 6, from

front.
Fig. 4. — Side view of the same crauinm, twice natural size; c, the same, from below.
Fig. 5. — Anterior part of bead of a third individual from above, natural tize; a, the right side; 6, the

front ; the anterior part of the nasal bones is wanting.
Fig. 6. — Corresponding part of the cranium of a fourth individual, natural size ; nasal bones complete.
Fig. 7. — Eight side of crauinm of animal figured in fig. 6, twice natural size.
EMg. 8.— Inferior palatal view of cranium of a fifth individual, twice natural size.
Fig. 9. — Left ramus mandibuli of a sixth individual, external side, natural size ; a, inner side ; b, from

above, twice natural size; c, from below, twice natural size.
Fig. 10. — Eight mandibular ramus of a seventh individual, natural size, external view; a, internal

view ; 6, superior view, twice natural size, showing molars almost unworn.
Fig. 11.— Eight ramus of an eighth individual, twice natural size, displaying the molars in an advanced

stage of wear.
Fig. 12. — Eight ramus of another and smaller individual, natural size, external side ; a, inner side.
Fig. 13. — Proximal portion of left ramus of a tenth iudividual with the last molar, natural size, the

inner side.
Figs. 14-18. — Helincomi/s vetus Cope. Page 846.
Fig. 14. — Left ramus of rnandible, outer side, natural size.
Fig. 15. The same ramus, twice natural size, from above.
Fig. 16.— The same ramus three times natural size, external view.

Fig. 17. — Anterior portion of a second left ramus, three times natural size; from above; first and sec-
ond molars in place.
Fig. 18. — Left ramus of a tliird individual, inner side, natural size; a, the same view of the same,

three times natural size; b, superior view of the same, three times natural size, with molars in an

advanced stage of wear.
Figs. 19-20. — Oyitmoptyclms viinutns Cope. Page 822.
Fig. 19. — Palatal face of skull, twice natural size.

Fig. 20. — A second skull, twice natural size, from above; a, fiom right side ; b, from below.
Fig. 21.— A third skull, on which flie species G.«a.SM/M8 was established, twice natural size, from above;

«, from right side ; b, from below.
Fig. 22. — Left ramus of a fourth specimen, outer side, natural size ; a, inner side.
Fig. 23. The ramus figured in fig. 22, twice natural size, external side ; a, inner side ; 6, superior view ;

c, inferior view.
Fig. 24. — Left ramus of another individual, twice natural size, viewed from above, showing unworn

crowns of molars.
Fig. 25. — Eight mandibular nimus of a sixth individual from above; twice natural size.
Fig. 26. — Eight humerus wanting the head, twice natural size, from the front ; a, from behind ; 6, from

outer, and c, from inner side.
Fig. 27. — Eight ischium, twice natural size, external view ; a, internal view.
Fig. 28. — Distal portion of femur, twice natural size, from front; c, from side.
Fig. 29.— Distal end of tibia, anterior face, and a, posterior view, twice natural size.
Fig. 30. — Calcaueuni superior, and a, inferior view, twice natural size.
Figs. 31-34. — Gymnoptijchiis triloplius. Cope. Page 826.
Fig. 31. — Eight mandibular ramus, natural size, external side.

Fig. 32.^The same ramus, twice natural size, external view; a, internal view; 6, superior view.
Fig. 33. — Left ramus of another individual, twice natural size, viewed from above.
Fig. 34. — Distal itortion of femur found mingled with jaws of Gymnoptychus, and supposed from its

superior size to belong to this species ; front view ; a, lateral view.
Fig. 35. — The left mandibular ramus of Sciurusrelielus Cope, twice natural size, external side ; a, inter-
nal; 6, superior; c, inferior views. Page 817.

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T- Sinclair & San.iith Phiiada

1—13 EUMYS EL.EGANS 14—18 HELISCOMYS VETUS 19—30 GYMNOPTYCHUS
MINUTUS. 31—4 G- TRTLCPHUS. 35 SCIURUS RELICTtJS.

PLATE L XVI.

Figs. 1-27.— PaJaolagtis hai/cleni. Natural size, excepting figs. 4, 5, 9, 11 6, 13, 14, 15, and 24, which are

twice natural size. Page 875.
Fig. 1. — Auterior part of cranium, palatal view; a, left side; 6, superior view.
Fig. 2. — Auterior part of a second individual, palatal view; c, view from the front.
Fig. 3. — Otic bulla of another individual, exterual view, displaying meatus ; b, posterior view.
Fig. 4.— L(>ft half of palate of skull represented in fig. 1, twice natural size.
Fig. 5. — Superior view of left mandibular ramus of another animal.
Fig. 0. — Eight ramus of auotber individual, external side; a, internal side; 6, from above; c, from

below.
Fig. 7. — External view of another right ramus.
Fig. 8. — External view of a third right ramus; a, internal view.
Fig. 9. — Superior view of the ramus represented in Fig. 8, twice natural size ; the first molax not worn,

the last molar not protruded.
Fig. 10. — Left ramus of a younger individual which retains the first two deciduous molars, and in which

the last molar is not protruded; representing the supposed species Iriciuvi lepormum; o, the external

side, the external wall removed so as to display the first and second permanent molars in the

alveolus; 6, superior view.
Fig. 11. — Left ramus of a still younger auimal, iu which the first two deciduous molars are the only ones

present, the crown of the first true molar j ust appearing in the alveolus ; a, the inner side ; 6, superior

view, twice uatural size.
Fig. 12.— Fragment of a left ramus of similar age displaying the same stage of dentition, outer view.
Fig. 13. — Superior view of a third r.imu8, twite uatural size.
Fig. 14. — Superior view of a fourth ramus of the same age, twice natural size.
Fig. 15. — Portion of right maxillary bone disjilayiug three molars of the immature dentition. From

Fig. 11 to fig. 15 the jaws were formerly referred to the supposed species Tridum avunculus.
Fig. 16. — Fragment of right humerus from front ; a, from behind.
Fig. ]7. — Distal extremity of a second humerus.
Fig. 18. — An ulna, from above.

Fig. 19. — A radius, from below ; a, from the side ; b, proximal view.
Fig. 20. — Right ilium, external aspect; a, internal side.

Fig. 21. — Proximal extremity of left femur, from the front ; a, from behind; b, proximal view.
Fig. 22. — Distal portion of femur viewed from the front ; a, from behind ; b, distal view.
Fig. 23. — Eight tibia, iiroximal extremity, from the front ; a, posterior side ; b, proximal extremity ; c,

distal and median portion of another right tibia from behiud ; d, from front ; e, distal extremity.
Fig. 24. — Right astragalus from above; a, from below, like the last figure, twice natural size.
Fig. 25. — The same astragalus, inner side ; a, the exterual side, natural size.

Fig. 26. — Right caleaneum, uatural size, from above; a, from below; b, from the inner, c, from the ex-
terual side.
Fig. 27.- Left mandibular ramus of an individual not quite adult; type specimen of Palaolaijun aya-

petillus ; uatural size ; o, the inner side ; b, superior view.
Fig. 28.— Pal wolagus turflidus. Left mandibular ramus, inferior view. Page 882.

Fig. 29. — I.epus eunisianua. Superior dentition, from below ; a, b, c, left mandibularramus, internal, ex-
ternal, and superior views. Page 886.
Fig. 30. — Ischyromya typus. Left mandibular ramus, inferior view. Page 835.
Figs. 31-32. — Paciculu3 insoHtus. Twice uatural size ; 31, first and second superior molars ; 32, inferior

molars ; grinding faces. From the John Day River, Oregon. Page 854.
Fig. 33. — Hesperomys nematodon. Frontal region, from above, natural size; a, inferior view of part of

same specimen, 1.5 times uatural size, showing unworn superior molars from below. Page 853.
Fig. 34. — Part of left ramus, with the grinding faces of the molar teeth well worn ; a, inner side; b,

superior view.
Fig. 35. — Fragment of a right ramus supporting a molar tooth, little worn, exti mal \ iew ; a, internal,

and b, superior views.
Fig, 36. — Portion of a right ramus supporting the last premolar tooth, external view ; a, internal view;

b, &om above.

US, GEOLOGICAL SURVEY OF THE TERRITORIES

PLATE LXVI

T SmclaiT & Son, Lith . Plula

:^i'7 PALAEoLaGUS HAYDENI. 28.P.TURGIDUS 29 LEPUS ENNISIANUS 30 ISCiriTlOMYS T^fPUS
31-32.PACICULUS INSOLITUS %-.33,HESPER0MTS NEMATODON. 34-36 MENOTHERIUM LEMURINUM

PLATE LXVII.

Figures of Eodeniia, mostly natural size.

Figs. 1-12. — Isclii/fomiis typiis Leidy. Page 835.

Fig. 1. — Cranium right side ; a, from above; ft, from below ; c, from front.

Fig. 2. — Left mandible of another individual, external side; a, inner side;" 6, from above.

Fig. 3. — Right mandibular ramus lacking anterior portion, with molar teeth in an advanced stage of

wear ; b, from above.
Fig. 4. — Ramus of another individual, external side; b, from above, displaying crown of fourth molar

not fully protruded.
Fig. 5. — Superior view of left ramus of another individual.

Fig. 6. — Fragment of right ramus of a very youug individual, showing the third molar not yet pro-
truded.
Fig. 7. — Distal extremity of right humerus, from the front.
Fig. 8.— Distal end of right humerus of a larger individual, from the front; a, from behind; b, distal

view.
Fig. 9. — External side of right ilium ; a, internal side.

Fig. 10. — Distal extremity and part of shaft of tibia from behind; a, from front; 6, distal extremity.
Fig. 11. — Astragalus, superior view ; a, from below ; b, external side.
Fig. 12. — Calc.ineum, extern.al side; a, from above; natural size.
Figs. 13-27. — Palwolagits Uirfjidus Cope. Natural size. Page 882.

Fig. 13. — Left mandibular ramus of an adult, external side ; a, inner i ide ; b, from above.
Fig. 14. — Left ramus of a second individual, external side; o, inner side; b, from above.
Fig. 15. — Portion of right ramus of a larger individual, outer side ; ft, superior view.
Fig. 16. — Maxillary and palatine bones of right side, external view ; «, inferior view.
Fig. 17. — Maxillary and palatine bones of another individual, external view ; a, from below.
Fig. 18. — Right maxillary of an older individual seen from below.
Fig. 19. — Part of left mandible of a young individual, supporting the first and seeond deciduous

molars, external view; o, iutern.al view.
Fig. 20. — Superior view of the same fragment, twice natural size. This specimen was the type of

TricUim paniense.
Fig. 21. — Proximal portion of humerus; ft, proximal view of head.
Fig. 22. — Distal portion of right humerus from the front; a, from behind; 6, external asi)ect; c, distal

view.
Fig. 23. — Proximal portion of feuuir, posterior view ; a, anterior view ; ft, proximal view.
fig. 24. — Distal extremity of femur from the front ; a, external view.
Fig. 25. — Distal portion of tibia from the front; a, the external aspect.

Fig. 26. — The distal extremity of another tibia, posterior side; o, internal view; ft, astragalar surface.
Fig. 27. — Astragalus, external side ; a, superior ; 6, inferior views.
Fig. 28. — Left mandibular ramus of Pa Iwolagus triplei, natural size ; external view ; a, internal view ; 6,

superior view, displaying grinding surfaces of molars. Page 881.
Fig. 29. — Cast of brain of Palaolagua haydeni, natural size, from above. Page 875.

us GEOLOGICAL SURVEY OF THE TERRITORIES

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PLATE LXVIIa.

Mainuiali.a from tin' White River bed ot Colorodo.

Fig. 1. — Left mandibular ramus of Bij(vn()don horndiis, external view; o, the same, from above; both

three-fourths natural size.
Fig. "2. — Portion of left mandibular ramus of Amphicijon ottns, from above, natural size. Page 894.
Fig. 3. — Portion of right ramus of the mandible represented in fig. 2, external view, natural size.
Fig. 4. — Portion of left mandibular ramus of Jmphu-yon harishor-niaiius, from the inner side ; u, from

above, natural size. Page 896.
Figs. .5,6. — Gahcijnus lippincoHianus. Natural size. Page 919.
Fig. .'i.— Portion of left mandibular ramus, external view ; ft, superior view.
Fig. t>. — Portion of right mandibular ramus, external view ; 6, from above.
Figs. 7-11. — Galevi/iius gregarius. The figures are of the natural size, and a represents the inner side,

and b the superior view in each ease. Fig. 8 represents a ramus which is peculiar iu lacking the

second tubercular molar. Page 910.
Fig. V2. — A portion of the left mandibular ramus of Bunceluriis osoriim, twice natural size, from within ; «,

the same, outer side ; 6, the same, twice natural size, from above.
Fig. 13. — Right mandibular ramus of an immature Bunwliints lagophagus, from within, 1^ times the

natural size ; 6, the samp, from above. Page 946.
Fig. 14. Portion of the left mandibular ramus of an adult Biiiiwhirus Uigophagns, natural .size, viewed

fi om the outer side. The premolar does not belong to the species. Page 946.
Fig. lu. — Dhiktin squalklens, right ramus of mandible, with superior canine, exterior view, natural

size ; n, superior canine view of inner side of crown; 6, superior view of ramus ; c, base of canine,

from above. Page 979.
Fig. 16. —Right mandibular ramus of probably the same species, external view, natural size ; 6, from

above.
Fig. 17. — Portion of right mandibular ramus of a young individual of a Hoplophoneus, ou which the

H. orcodoHfis was proposed ; external view, natural size ; ft, from above. Page 993.

r C5h:0L0GlC>X SiJRVTOi' OT" Tiffi TaHrdTORiES.

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17 HOPLOPHONEUS.

rcla-.r i Soil Lith Fhiladd

PLATE LXVIII.

CanidsB from the John Day epoch of Oregon, natural size, the last superior molar lost.

Figs. 1-4. — Amphicyon cuspigerus. Skull, natural size; 2, Irom above; 3, from below; 4, from behind.

Page 898.
Figs. b-8.—Galecijmi8 gregarivs. Skull, natural size ; 6, from above ; 7, below ; 8, behind. Page 916.
Fig. 9.— Part of right mandibular ramus of lemnocyon altigenis, natural size, external view ; a, internal

view ; h, from above. Page 903.

l[a OEOLGGICAI. SUKvTTV OF THE TERRITCRE;

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9 TEMNOCYO^J ALTTGBNI3 . Vi.

PLATE LXIX.

Canidce, natural size.
Figs. 1,2. — Oliflobunis crassioultus. Typical specimen, from the Jobn Day basin of Oregon. Page 940.
Fig. 1. — Left side of anterior part of cranium; a, from below. The first inferior premolar i.s too large,

and too near the second premolar. It is correctly represented on Cut :iG. Page 9:59.
rig. 2. — Mandibular ramus, from above.

Figs. 3-.'i. — Eiiliiidrocj/on stenocephahis. From the John Day basin of Ongon. Page 935.
Fig. 3. — Cranium of an old animal, right nide; n, tlft same, from above.
Pigs. 4, .5. — Portions of jaws of a young animal.
I'ig. 4. — Left maxillary bone supporting the canine and two premolars, left side; a. from below; 6, the

crown of the second tubercular molar, from below.
Fig. 5. — Portion of left mandibular ramus of the same, external side ; a, from above.

LI S OEOLOGIC/Vl, SlJRMvr' OF THE TERRITORIKS.

FLATF LXIX

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PLATE LXX.

CauidiB, from the Joliu Day bed of Oregou ; all natural size.

Fig. 1. — Htjcenociioit sectoriiis. Right maslllai;i- Ijoiie, from below ; from the John Day bed of Oregon.

Page 94:1
Fig. 2. — Galeci/iius gtifimariaiius. «, Inferior view ; from Oregim ; J. L. Wortmau. Page 920.
Fig. 3. — Galecj/iuis geismarianus. Second sjicciiuen ; distal extremity of tibia. Page 920.
Fig. 4. — Gahcynus laUdens. Inferior view of dam.aged skn^' his sknll is ai ctmipanied by lower jaw

with the teeth rather more worn than those of fig. 4. gon, J. L. Wortmau. Page 930.

Fig. 5. — GalecyituK latidens. Maudible, external side, shu .iug additional tubercle; a, from above.

Page 9;i0.
Fig. 6. — Galeci/nus lemur. Sknll, right side. Oregon. J. L. Wortman ; n, the same, from below; one

zygoma nuieh damagi'd. Page 931.
Fig. 7. — Gahcynus lemur. Mandibular ramus of a seer.,d specimen, external side; a, from above.

Page 931.
Fig. 8. — Gahcynus lemur. Third specimen, cranium, from above. Page 931.
Fig. 9. — Temnocyon jose})!)!. Left maxillary bone, from below, typical specimen. Camp Creek, Oregon,

J. L. Wortmau. Page 912.
Fig. 10. — Ttmnocyon tcallociauus. Left maxillary bone, from below ; typical specimen. Pago 905.
Fig. 11. — Temnocyon alligenis. Right maxillary bone, from below; accompanied by the mandible.

Oregon. J. L. Wortman. Page 903.
Fig. 12. — Ampkicyon hartahoruianus. Right maxillary bone, from below. White River group of Horse

Tail Creek. N'ortheastern Colorado. E. D. Cope. Page 896.

U S GEOLOGICAL SURVEY OF THH TERBlTOniH;:

PLATE L.XX

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Lhn-AENOCYON SECTORIUS. Z 3.GALECYNUS GEISMARIANUS. 4-5. G.LATIDENS. 6-8. G. LEMUR
9.TEMN0CY0N JOSEPHL lO.T.WAiLOVIANUS. ILT.ALTIGEMIS , 12 AMPHICYON HAP.TSHORNIANUS,

^^

PLATE LXX

a.

■(laleci/iius geismariaiiiis. Three-fomtbs natuml size; two iiidivkUials; figs. 1-9 the first, ami figs. 10-lii

the second. From the John Day lied of Oregou. Page 920.
Figs. 1-7. — The imperfect Tertebral column of the iudividual rejiresented in figs. 2, 3, Plate LXX,fi'om

below; fig. 1, cervicals ; 2, dorsals : 2a, anterior extremity of the first; :), posterior dorsals and

Inmbars; 4-5, lumbars; 4a, posterior extremity of No. 4; 6, a caudal.
Fig. 7. — Sacrum, pelvis and proximal caudal vertebrse, seen from above. '

Fig. 8. — Distal extremity of humerus, anterior view.
Fig 9. — Tarsus, natural size, from above ; a, from the inner side.
Fig. 10.^ — Part of skeleton of another specimen of Galecynits geismarianun in a block of matrix. It

includes ten dorsal vertebriB and fivo lumbars, with parts of two cervicals, and several ribs. The

head and distal part of the hnmerus, with the large part of the ulna and radius. Also, the pelvis,

p.arts of both femora with patella, and one tibia entire; all seen from the right side. Page 920.
Fig. 11. — Another portion of the block figured in tig. 10, containing three cervical vertebne ; proximal

part of humerus; ulna and radius, broken, and parts of both anterior feet.
iFig. 12. — Left side of axis vertebra seen in the block, tig. 11.

PLATE LXXI.

Temnocyon coryphaus, skull, natural size. From the John Day bed of Oregon. Page 906.

Fig. 1. — The right side.
Fig. 2. — The inferior surface.
Fig. 3. — The superior view.

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TEMKCGYON CORYPHAEUS H

T- Sinclair tSon.iith PliUada

PLATE LXXIa.

Figs. 1-8. — Bone.s of Temnocyoii cori/phwus, t\vo-tbir<ls iiatm;il size. From the John Day bed of Ore-
gon. Page 906.

Fig. 1 is from one iudividiial; tigs. 2-7 are from a second iudividnal, wliicli include a sliull ; tig. 7 is
from the same specimen as tig. 1.

Fig. 1. — Portion of the left mandibular ramus, inner side ; a, external side ; 6, superior view.

Fig. 2. — Four lumbar vertebric, from below.

Figs. 3 and 4. — Right sides of the middle pair of ihe above vertebra, showing weak ana|)ophyses.

Fig. 4«. — Anti rior extremity of 4 ; ft, jiosterior extremity of 4.

Fig. 5. — Head of humerus, jiroximal view -a, lateral view.

Fig. 6. — Distal extremity of humerus, anterior view; 6, distal view.

Fig. 7. — Calcanenm from the same lot as the skull whose mandible is represented in Fig. 1.

Figs. 8-10. — Archaliirus debilis. From an individual dift'erent from the one represented in Pl.ate LXXII,
but accompanied by a large part of the cranium; two-thirds natural size. Page 95.3,

Fig. 3. — Posterior lumbar vertebra ; «, posterior view.

Fig. 9. — Head of humerns.

Fig. 10. — Condyles of humerns, anterior view; «, posterior face ; 6, distal extremity.

Fig. 11. — Portiim of ulna, from the front.

Fig. 12. — Third metacarpal, from front; a, from side.

Fig. 1,'?. — Fifth metacarpal, from front; a, from inner side, proximal view.

Fig. 14. — Head of left tibia, outer side; a, posteiior side; b, proximal < nd.

Fig. 15. — Distal end of same, e.xternal side; a, the same with astragalus from front.

Fig. ICi. — Astragalus from above; a, from front; /', from below.

Fig. 17. — Nimniriis confcrtua, left ramus of mandible, external side; «, inner side; 6, from above.
Page 972.

U, S, GEOLCGIG'\L SURVEY OF THE TETtRlTGRIEt

PUATE ]:.J?XIa

1-7.TEMNOGYON CORYPHAEUS V.. 8-16 ARCHAELURUS DEBILIS %

17 ARCHAELURU-S CONFERTUS K.

PLATE LXXII.

Archwlurus deiilis, cranium, natural size. Page 953.
Fig. 1, profile; fig. 2, from above; fig. 3, from below.

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PLATE LXXIIa.

F)gs. 1-3. — Nimrarus gomj>hodug. Page 964.

Fjg. 1. — Front view of left half of cranium of speciiuen figured on Plate LXXIII, natural size.

Fig. 2. — Posterior view of cranium and cervical vertebrie of specimen represented in fig. 1, natural size.

Fig. 3. — The posterior four cervical and anterior two dorsal vertebric of the specimen represented in

the same plate, two- thirds natural size; the right side; a, inferior surface.
Figs. 4-7. — Temnocyon coryphwiis. The individual represented on Plate LXXI. Page 906.
Fig. 4. — Cran.um, from front; natural size.
Fig. 5. — Posterior view of the same; natural size.

Fig. 6. — Cervical vertebra, two-thirds natural size, from behind; a, from above.
Fig. 7. — Scapula of the same, two-thirds natural size, from behind; a, proximal view of the same.

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Nimravus gomphodus. Cranium and auterior three cervical vertebrte, uatural size, from the left side

Typical specimen. Page 964.

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PLATE LXXIV.

Bones of Nimrariis gom2)hodiis, two-tbinls natural size. Page 964.

Figs. 1-2. — From one individual.

Fi^. 1. — Right mandibular ramus, inner side ; a, from above.

Fif;. 2. — Left fnmur, from behind; a, from ihe inner side; b, distal end.

Figs. 3-10. — Bones of an individual of Poflonodon brachyops, whieli includes maxillary bone with teeth.

Page, 987.
Fig. .■?.- — Five consecutive dorsal and luiiiliar vertebne, all excepting the anterior one cut fro n one

block ; «, same from below.
Fig. 4. — Posterior view of anterior vertebra of the series, showing the auapophyses.
Fig. .'). — Posterior view of the ])Osterior vertebni of the .series, showing the weak anapophyses.
Fig. 0. — Proximal portion of right tibia, from behind; «, proximal view.
Fig. 7. — Patella, anterior side.

Fig. 8. — Right calcanenm from above ; a, outer side ; b, inferior aspect ; c, distal extremity.
Fig 9. — Navicular bone from al>ove.
Fig. 10. — Right cuboid from front ; a, external view.

JEOLOGICAL SURVFf 3F THE TERRITCPJSS

:^LATE Lx:<r\

.^mcla;r &. Sor. LtK rh;!

NIM.RAVUS GOMPHODUS

PLATE LXXlVa.

SknU of Pogonodon platycopis, uatnral size. Page 982.

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"'©s^ffisr.

PLATE LXXV.

Carnivoia, natural size.

1. Diuieiis cnjclops, cranium, right side ; a, from above ; t, from below. Page 974.

Fig. 2. — Mandible of the same ; the symphysis seeu from the front.

Fig. 3. — Hycenocyon basilatus. Portion of mandible, right side ; a, from above. Page 942.

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PIj.aTB I.XX"

T Sinclair i 6on,li'.h.Philada

1-2 DINICTIS CYCLOPS K. 3 HYAENOCYON BASILATUS 34.

PLATE LXXVa.

Figs. 1-2. — Cranium of Hoplophoneus oreodonHs from Eastern Colorado, natural size ; restored from frag-
ments. Page 993.

Fig. 1. — Left side.

Fig. 2. — Palate from below. t

Figs. '3-5. — Cranium of Hoplophonms cenhralis Cope, natural size ; from the Truckee Miocene of Oregon
Page 997.

FiR. 3.— Left side.

Fig. 4. Superior, and Fig. 5, inferior views.

PHg. 0. — Po.tiou of superior ciiuiao of Hoplupkoneaa sirigidens, left side; a, -ectuiii. Puge lOUl.

i^ S OKOLOGiCAi SURVFi- Oh' THE 'J'KRRn^ORIRS

I 'LATE LXX".'a

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1-2 HOPLOPHONEUS OREODONTIS 3-5 MACHAERODUS CEREERAI.IS

6 M. STRIGIDEINS '/i .