38 Mamm. 
MAMMALIA. 
Sclater, W. L. On a New Genus and Species of Rodents of the Family 
Dipodidce from Central Asia. P. Z. S. 1890, pp. G10-613, pi. 1, 
woodcut. 
The species described was probably obtained from Yarkand, and 
indicates a fourth genus of Dipodince , readily distinguished by cranial 
characters. 
JEucJioreutes naso y n. g. & sp., W. L. Sclater, l. c. 
h . Hystriciml 
Meek, A. ( Note on the Female Organs of Erethizon dorsatus. Stud. 
Mus. Dundee, i, Art. xii, 1 p., and plate. 
Figures these organs in order to show the extremely primitive structure 
they present. 
i . Chinchillid.®. 
Manigault, G. E. Notes on the Osteology of Chinchilla lanigera. 
P. Elliott Soc. 1890, pp. 237-239, woodcuts. 
The peculiarities indicated are the presence of three sacral vertebrae, 
and of a semi-lunar ossification in the external auditory meatus. . The 
latter is regarded as representing part of the petrosal ; it occurs in Cavia 
and some other Hystricomorpha. 
j . Castoroididjl 
Castoroides ohiotnsis : the discovery of an almost complete skeleton at 
Richmond, Indianopolis, recorded by E. W. Claypole, Am. Geol. vi, 
p. 260, and by J. Moore, Am. Nat. xxiv, p. 767. 
Ji, CAVlIDAi. 
t Hydrochcerus robustus : an incisor from the Ashley River, S. Carolina, 
provisionally referred to this species by J. Leidy, P. Ac. Philad. 1890, 
pp. 184 & 185. 
l . Lagomyidjl 
Lagomys erythotis , n. sp., E. BOcilner, t . c. ( supra , p. 31), pp. 165- 
172, pis. xxi & xxiv, figs. 1-6, Central Asia. 
Lagomys melanostomus , n. sp., Buchner, t. c. pp. 176-184, pi. xxii, 
figs. 2 & 3. 
Lagomys roylei , L. rutilus , and L. dauricus y figured by Buchner, t. c. 
m. Leporidjl 
Hall, E. S. On a Case of the Occurrence of a Persistent Right 
Posterior Cardinal Vein in the Rabbit. P. Z. S. 1890, pp. 577-579, 
woodcut. 
