MAMMALIA. 683 



of second toe largest of all. Tail short. (Deut. form. Owen, 

 . 1-1 1-1 3-3 -^. 



Sp. BatJiyergus maritimus Illig., Mus mantimus Gmel. , Mus suillus Schreb., 

 Buff. Suppl. vi. fig. 38 (fig. of Allemand from the Dutch edit, of BuP- 

 fon), Schreb. Tab. 204 b, Gueb. Iconogr., Mamin. PI. 38, fig. 3, the 

 skeleton figured in Pander %ind D'Alton Vergl. Osteolog., Heft vi. Tab. 

 3 ; the sand-mole; this animal lives in sandy countries and on the sand- 

 hills at the Cape of Good Hope ; it feeds on roots, like the other species of 

 this family. 



Ascomys Lichtenst., Saccostomiis KuHL, Pseudostoma Say, 



4 — 4 



Orycteromys or Oryctomys Blainv. Molar teeth j , destitute 



4 — 4 



of roots, suLcylindrical. Ears very short, rounded. Eyes small. 



Buccal pouches large, deep (when empty received in a cutaneous 



fold, opening downwards by a long fissm-e at the inferior margin of 



jaw). Fore feet fossorial, with middle three claws long, incurved, 



the third longest of all. Tail short. 



a) With u]}per incisors deeply indented in the middle ly a longitudinal 

 groove. 



Sp. Ascomys canadensis Lichtenst., Mus hursarius Shaw, Geomys hursarius 

 Richardson, Shaw Transact, of the Linn. Soc. v. p. 227, Tab. viii. 

 (copied in Desmarest Encycl. meth., Mamm. PI. Suppl. x. fig. 4) ; LiCH- 

 TENSTEIN Ueher die dussere Backentasche der Nagethiere, Abhandl. der 

 ATcad. der Wisseyisch. zu Berlin, vii. 1825, s. 13- — 20, Tab. 2; red-brown; 

 trunk full 8", tail 3" long; this animal lives in Canada. (In Shaw's 

 figure the buccal pouches are inverted, hanging down on each side of the 

 head). — Ascomys mexicanus Lichtenst.; shining dark-brown. 



b) With upper incisors marked by a very thin lateral groove or quite 

 smooth. Thomomys Maxim. 



Sp. Ascomys lidbivorus, Biplostoma hullivornm Eichards. Faun. hor. Amer., 

 Mamm. PI. 18 b, copied in Krauss 1. 1. Tab. 20, fig. 7; Ascomys rufescens 

 Wagn., Thomomys rufescens Maxim. Neuw., Oryctomys Bottw Etdodx et 

 Gervais (Guerin 3Iag. de Zool. 1836, Mamm. PI. 21, fig. 4, fig. of teeth), 

 in Wagner's opinion. 



Haplodon Wagl., Wagn., Aplodontia ElCHAEDSON. 



Sp. Haplodon leporinus, Aplodontia leporina Richards. Zool. Journ. 1829, 

 P- 335> -Pa""-- ior Amer. i. p. 211, Tab. 18 c, figs. 7— J4, Arctomys rufa 

 Harlan, Fauna Americana, Philadelphia, 1825, p. 208; hab. the west of 

 North America near the river Columbia. The animal unknown to me, 



