42 Mamm. 
MAMMALIA. 
Periptychus ditrig onus , sp. n. (foss.), E. D. Cope, P. Ac. Philad. 1882, 
p. 465, and P. Am. Phil. Soc. xx. p. 465, Puerco beds of New Mexico. 
Referred to Conoryctes ; P. Ac. Philad. 1883, p. 168. 
Periptychus coarctatus , sp. n. (foss.), id. P. Ac. Philad. 1883, p. 168, 
New Mexico. 
Haploconus xiphodon } sp. n. (foss.), id. 1. c. p. 466. 
Conoryctes crassicuspis } sp. n. (foss.), id. ibid. 
Anisonchus agcipetillus and cophater , spp. nn. (foss.), id. P. Am. Phil. 
Soc. xxi. pp. 320 & 321, Puerco Eocene. 
Meniscothekjidje. 
Meniscotherium tapiacitxs , sp. n. (foss.), E. D. Cope, P. Am. Phil. Soc. 
xx. p. 470, New Mexico. 
Genus incertjj sedts. 
Zetodon gracilis , g. & sp. nn. (foss.), E. D. Cope, P. Ac. Philad. 1883, 
p. 169, Upper Puerco of New Mexico. “ May be either Marsupial or 
Condy lar thro us .” 
PERISSODA CTYLA. 
Rhinocerotid^. 
^ Scott, W. B., & Osborn, H. F. On the Origin and Development of 
the Rhinoceros Group. Nature, xxviii. p. 579. 
On Kowalevsky’s studies of Elasmotherium typus = Stereocerus, Duv., 
see E. D. Cope, Am. Nat. xvii. p. 72. 
Rhinoceros tichorrhinus. On remains from Schwenz, Silesia ; IT. Kunisch, 
JB. schles. Ges. lx. p. 124, 1882 (pub. 1883). Note on some upper 
molars ; F. Toula, Verh. geol. Reiclisanst. 1882, p. 279. 
Rhinoceros indicus. On its recent existence in the north-west pro- 
vinces, with a description of a tracing of an archaic rock-painting from 
Mirzapore representing its hunting; J. Cockburn, J. A. S. B. lii. pt. 2, 
p. 56, pis. vii. & viii. 
Orthocynodon. On its skull and its relations to other Rhinoceroses ; 
W. B. Scott & H. F. Osborn, Contr. E. M. Mus. Geol. Princeton, No. 3, 
p. 3. [Not seen by Recorder; cf. Zool. Anz. vii. p. 157.] 
Aphelops fossiger (foss.) recorded from Mexico, and from the Loup 
Fork Bed of the valley of the San Francisco River, N. Mexico ; E. D. 
Cope, P. Ac. Philad. 1883, p. 301. 
Lophiodontjd^i. 
Desmatotherium guyoti and Dilophodon minusculus, gg. & spp. nn. (foss.), 
W. B. Scott, Contr. E. M. Mus. Geol. Princeton, No. 3, p. 46. [Not seen 
by Recorder; cf. Zool. Anz. vii. p. 155.] 
