4; 7 2 Zoological Society : Mr. Ogilby's 



3. Alcks. Cornua in mare solo, palmata, decidua. Rhinaria 

 nulla. Sinus lachrymales exigui. Fossa interdigitales magnae. Fol- 

 liculi inguinales nulli. Mamma quatuor. Typus est Alces Machlis 

 (Cervus Alces). 



4. Cervus. Cornua in mare solo, ramosa, decidua. Rhinaria 

 magna. Sinus lachrymales distincti, mobiles. Fossa interdigitales 

 magnae. Folliculi inguinales nulli. Mamma quatuor. Typi sunt 

 C. Elaphus et C. Saumer aut Hippelaphus, Cuv. 



5. Caprea. Cornua in mare solo, subramosa, decidua. Rhinaria 

 distincta. Sinus lachrymales nulli. Fossa interdigitales magna 1 ,. Fol- 

 liculi inguinales nulli. Mamma quatuor. Typus est C. Capreolus. 



6. Prox. Cornua in mare solo, subramosa, decidua. Rhinaria 

 magna. Sinus lachrymales maximi, mobiles. Sinus duo supraorbi- 

 tals ad basin cornuum, magni, mobiles. Fossa interdigitales magnae. 

 Folliculi inguinales nulli. Mamma quatuor. Typus est Prox Mos- 

 chatus (Cervus Muntjac). 



Fam. III. MoschidjE. 



Pedes bisulci ; cornua nulla ; denies primores supra nulli, infra octo. 

 2 Genera. 



1. Moschus. Rhinaria magna. Sinus lachrymales nulli. Fossa 

 interdigitales nullae. Folliculi inguinales nulli. Mamma quatuor. 

 Typus est Moschus Moschiferus. 



2. Ixalus ? Rhinaria nulla. Sinus lachrymales exigui, distincti. 

 Fossa interdigitales nulla?. Folliculi inguinales exigui. Mamma dua?. 

 Typus est Ixalus Probaton, present vol. p. 124, or Proc. Zool. Soc, 

 Part IV. page 119. 



"The genus Ixalus, founded upon the observation of a single spe- 

 cimen, may eventually prove to belong to a different family ; it differs 

 little, indeed, from the true Antelopes : but even supposing it to 

 be correctly placed among the Moschida, other forms are still want- 

 ing to fill up the chasms which evidently exist among the characters 

 of that group. Two are more especially indicated, and our know- 

 ledge of the laws of organic combination and of the constituent parts 

 of other groups, gives us every reason to believe in their actual 

 existence, and to anticipate their discovery. They will be character- 

 ized nearly as follows, and will probably be found, one in the tropical 

 forests of the Indian Archipelago, and the other on the elevated table 

 lands of Mexico or South America. 



Hinnulus. Rhinaria magna. Sinus lachrymales distincti. Fossa 

 interdigitales nulla?. Folliculi inguinales nulli. Mamma quatuor. 



Capreolus. Rhinaria nulla. Sinus lachrymales nulli. Fossa in- 

 terdigitales parvas ? Folliculi inguinales? Mamma duae. 



" It may appear a bold, perhaps a presumptuous undertaking, thus 

 to predict the discovery of species, and define the characters of 

 genera, of whose actual existence we have no positive knowledge ; 

 but, as already remarked, all the analogies of nature, whether derived 

 from organic combination or from the constituent members of similar 

 groups, are in favour of the supposition ; and I may observe further, 

 that the recent discovery of the genus Ixalus, if indeed it eventually 

 prove to be a genus, of which I had long previously defined the 



