22 Mamm, 
MAMMALIA. 
"^SCHLECHTEii, J. Ueber Bau imd Form der Zahne bei dem Pferde uud 
Beinen Vorfaliren. luaug. Biss. Leipzig & Wien : 1881. (Extract 
from Oesterreich. Monatschrift. f. Thier-heilkde.) 
[Not seen by the Recorder.] 
CORNEVIN, 0. Nouveaux cas de didactylie chez le cheval et interpreta- 
tion de la polydacty lie des Equid^s en general. Lyon: 1881. 
[Not seen by the Recorder ; cf. Zool. Anz. v. p. 7.] 
'^ACHOLD, J. Zehn Tafeln zur Anatomie des Pferdes nach der Natur 
gezeichnet. 2 Aufl. Wien ; 1881. Large fol. 
[Not seen by the Recorder ; cf. Zool. Anz. iv. p. 497.] 
*^Flower, W. H. Article, “Horse: Part I. Zoology and Anatomy.’ 
Encyclopaedia Britannica, 9th edit. vol. xii. pp. 172-181. 
Equus cahallus. On a case of polydactylism (“Das Hipparion auf 
Jahrmarkten”) ; C. von Siebold, Arch. f. Anthrop. xiii. pp. 427-432. 
E. pt'zewalskii, sp. n., M. Poliakoff, Izvestia Imp. Russ. Geograph. Soc. 
1881, pp. 1-20, pis. i., ii. Central Asia. [cf. E. D. Morgan, Ann. N. H. (5) 
V viii. pp. 16-26.] 
CoRYPHODONTIDiE. 
^ Coryphodon anax (p. 168) repandiis (p. 171) curvicristis (p. 172) and 
/ marginatus (p. 174) spp. nn. (foss.), E. D. Cope, P. Am. Phil. Soc. xx.. 
Lower Eocene of Wyoming. 
Ectacodon cinctus, g. & sp. nn. (foss.), id. 1. c. p. 167, Lower Eocene of 
j Wyoming. 
j Manteodon subquadratus, g. & sp. nn. (foss.), id. 1. c. p. 166, Lower 
; Eocene of Wyoming. 
\ Metalophodon testis, sp. n. (foss.), id. 1. c. p. 175, Lower Eocene of 
'y^^Wyoming. 
PflENACODONTIDAi:. 
/ Phenacodus, Cope [cf. Zool. Rec. xi. p. 9] is a Perissodactylate form, 
j with bunodont molar teeth, as demonstrated by the recent discovery of 
/ a nearly entire skeleton. Phenacodus and its allies have, moreover, an 
astragalus “convex in all directions distally,” as in the Carnivora, aud 
articulating only with the navicular. The following classification of the 
Per issodacty lata is suggested : — 
Suborder Diplarthra (for the known families). 
„ Condylarihra (for the Phenacodontidce), 
distinguished by the characters already mentioned. 
The Phenacodontidoi were all poutadactylate in each limb, had a small 
smooth brain, with large olfactory lobes and cerebellum, and a third 
trochanter. They are all from the Lower Eocene. The genera are 
Phenacodus, and “ very probably Catathlccus, Mioclcenus, and Protogonia, 
and perhaps also Anisonchus\ ” E.D. Cope, Am. Nat. xv. pp. 1017 & 1018. 
Phenacodus hemiconus (p. 179) apternus, macropternus, hrachypternus 
(p. 180) and laticuneus (p. 181), spp. nn. (foss.), E. D. Cope, P. Am. Phil. 
