55 



it is presumed that all the species of the genus Halitherium passed 

 their existence in the shallows of the sea, or about the estuaries of riyers, 

 and partook of the manners of the dugongs of the present day. 



This genus was established by M. Kaup, to bring together many 

 fragments incorrectly ascribed by Cuvier and others to different 

 groups. 



M. Pictet enumerates the following species ; — 



HAiiiTHEEirM DTJBitTM, Cuvicr. 

 Hippopotamus dubius, Cuvier. 



Halithebiitm Q-ttettaedi, de Blainville. 

 Vacha marina, Q-uettard. 

 Manatus Ghtettardi, de Blainville. 



Hamtheeium eossilb, Cuvier. 

 Pliocafossilis, Cuvier. 

 Trichechus fossilis, Cuvier. 

 Trieheehus molassicus, Jaeger. 

 Manatus Ciwieri, Laurillard. 

 Manatus Cordieri, de Christol. 



Haiithebium Beaumonti, de Christol. 

 Haiitheeium Sttjdbei, de Meyer. 

 Metaxiike7'ivm Studeri, de Meyer. 



Haiitheeittm Seeeessii, G-ervais. 



OheirotJierium, of Bruno. 



Manatee, Dugong, Sippopotamus of various French authors. 



Genus Teachttheeitjm/ G-ervais. 



M. Grervais founded this genus solely upon one tooth, which was 

 obtained from the marine calcareous deposit of the Meiocene period at 

 the Eeole in France; consequently no information can be supplied beyond 

 that it was the last molar of the lower jaw, and that it had on the crown 

 three transverse tubercular ridges, and not two as ia the corresponding 

 tooth of the preceding genus, but otherwise resembliag it. 



Trachytherivmti Saulinii, Gervais, is necessarily the only species known. 



(S) Genus EDENTATtM. 



Genus Ehxtin a,' Illiger. 



Without teeth of any kind, the corneous lamellae, before described, 

 but on a larger scale, supplying their place ; Hps double, the outer 



^ rpaxis, rougli, and Brtpiov, animal. 

 ^ ^vtIs, wrinHed. 



