1825.] Mr. Gr^ on MammUak^ 341 



Fam.b. HALicoRiDiE. ^ .iftOTH^jaaia .^ .m^\ 



aaelwijio (^ioniiaib vll^ora Iba'l bnrrf 'to dmoril jifilf/oisdij:^ -{biwai,* 



}, (Jutting, two in each jaw, large, strong, separated from 

 the grinders by a space; canine teeth none; condyles of the 

 jaws longitudinal ; orbital and temporal fossae united ; toes dis- 

 tinct, with small conical claws ; thumb sometimes rudimenta^i^I 

 [Exceedingly difficult to arrange;. the following is otilyM 

 attempt according to their habits.] ' '\,,'^''^ 



^Ftit with scattered larger hairs or spines ; tail spiny or scal^'^ 



Fam. 1. MuRiDiE. 



Cutting teeth two in each jaw, lower, awl-shaped; grinders 

 simple or compound, upper shelving backward, lower forwards,; 

 hmbs proportionate ; tail scaly; fur.w,i,tU;S^ffftttpr|ej|iJ^r}g|^r£^§^ 

 or flat spines; clavicles distinct. ^ h^loo-rvnem »i9hnriO+ 



fGrinders rooted, simple. l.Murma* Mus, Jim. Otbmys, 

 F. Cuv. Capromys, Desm. 2. Hi/dromina. Hydromys, Geoff', 

 ttGrrinders rootless, compound. 3. Ondatrina. Ondatra. 

 4. Castorina, Castor, Lin, Osteopera, Harlan, 5. Echy^ 

 mina, Echymys, Geoff^, Heteromys, Desm. Saccomys, jp, 

 /"* ■''.' 



Fam. 2. HisTRiciDiE. 



Cutting teeth two in each jaw, lower, truncated ; grinders 4-4 

 in each jaw, rooted, compound; tongue and^ body coveped^^ith 

 spines; clavicles none. bsaBrk-nri gdmlf ^ bkd 



fTail short. 1. Histrix, Lin. 2. Acanthia. tt'^^il elon- 

 gated. 3. Erythizon. 4. Spygurus. 5. Simthurus^ F, Cuv. 



\fcS.' ^^Fiir nearly equally soft ; tail 3mne^<^hsai^^ bsiM 



jpfifn.^. Leporid^. i -vuVsVgM'jWs'^il ,Boa«lB8[ ,ftwk 



Cutting teeth two in each jaw, d^ four in tlie ra^per^Sney^owelp 



one subsubulate ; grinders numerous, rootless ; ears generally 



large ;, tongue often hairy ; eyes large ; clavicles none ; fore feet 



short : hinder ones long; ; tail none, or very short, hairy ; £ur 



soft. " t I J ' > ■ 



fCutting teeth four ''^M^'^'f^'teporina. Lepijs. ? Z^ 

 mina. Lagomys. ffCutting teeth two above. 3. Caviiua, 

 Cavia^ jLw. Kerodon,jF.C/i<v* 4. Hydrocharina. Hydrocharus, 

 Brisso)i. 5. Dasyporcina. Cselogenys, Illig. Dasyporca, lllig, 

 DoliehotiSjijDessb inc>nuno'iq "iJiUii\^;it^■^.i tiLiid ,v^;apido ^bod. 



Fam. A. Ierboid^. ,\ .Hji-^'ufohT 



Cutting teeth two in each jaw ; grinders simple,, <WP cc^injp^i^id, 

 rooted; ears moderate; eyes large, prominent; elaviqle^fjdis- 

 tinct ; fore feet short (used as hands) ; hind feet very long ; tail 

 long, hairy, used in leaping or walking ; fur soft. 



