Bibliographical Notices. 53 



The new genera and species described are : — 

 Rhombomys. Dentes primores superiores sulcati ; molarium lami- 

 nse obtuse rhoraboideae, medio dilatatae ; os interparietale tians- 

 versim coarctatum ; habitus murinus, cauda longa crassius- 

 cula, dense et breviter pilosa, apice subfloccosa. This genus is 

 founded on Meriones rohustus. Fr. Cuvier's Gerbille indeter- 

 minee (Trans. Zool. Soc. ii. 2. p. 143) belongs decidedly here. 

 Rhombomys palUdus. Rh. supra pallide flavidus, subtus albido- 

 lutescens, auriculis parvis ; cauda crassiuscula, supra isabellina, 

 infra lutescente, apice nigro-fasciculata ; dentibus primoribus 

 superioribus bicanaliculatis. 



Body 5" 6'" Tail without hair 5" 1'" 



Projecting hair. 6 Length of ear .. . 6 



Hinder foot to apex of the claw 1 5 



Hab. South-eastern Russia. 

 Mystromys. Dentes primores Iseves baud sulcati, molarium la- 

 mellae (2-3) medio anfractse, parte altera paulidum post alte- 

 ram posita ; auriculae pilosae araplse, cauda breviter et dense 

 pilosa, mediocris, apicem versus attenuata. 

 M. albipes. AI. subbrunneo-griseus, nigro irroratus, subtus griseo- 

 albidus, pedibus albis, cauda supra fusca, infra albida. 

 Body, in straight line . 



Tail 



Hinder foot -with claw 

 Hab. South Africa. 

 Euryotis pallida, Wagn. E. supra flava, nigro intermixta, lateribus 

 subtusque e lutescente albida ; auriculis mediocribus ; cauda 

 supra nigra, basi flavida, subtus lutescente ; dentibus primori- 

 bus superioribus bisulcatis, inferioribus unicanaliculatis. 

 The length of the largest specimen in a straight line is 5" 9'", 

 curved 6" 1'"; of the tail, the apex of which is wanting, 2'' 7'" ; of 

 the smaller specimen, the body curved = .5" 3'", tail 2" 6'". 



Hab. South Africa. 

 Dendromys pumilio, Wagn. D. fulvus, subtus albus. 



Body in straight line 2" 8'", curved 2" 11'"; tail 3" 8'" ; ear 

 0" 5'" ; front foot with claw 0" 4i"' ; hinder foot 0" 8'". 



Hab. South point of Africa. 

 Pteromys uurantiacus, Wagn. Pt. supra aurantio-fulvus, subtus al- 

 bidus, sparsim ochraceo-lavatus ; patagio prope carpum in an- 

 gulum acuminatum excurrente, cauda plana, disticha, castanea. 

 Body 5" 10'"; tail somewhat mutilated 4" 3'"; ear 0" 5'". 

 Hab. Island of Banca. 

 Lepus Mediterraneus, Wagn. L. timido multo minor, auriculis capita 

 longioribus, medio nudiusculis, apice nigris ; nucha artubusque 

 ochraceo-rufescentibus, cauda supra nigra, infra albida, stria 

 alba post oculos. 



Body in straight line 13" 6'" Curved 15" 5'" 



Head 3 5 Ears 4 3 



Tail with hair about 3 Ear-fissure . 3 8 



Hub. Sardinia, Gibraltar ? 



