65 



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 rivers, 

 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 : 



HALITHEEITTM DUBIUM, Cuvier. 

 Hippopotamus dubius, Cuvier. 

 medius, 



HALITHEBIUM GUETTABDI, de Blainville. 

 Vacha marina, Guettard. 

 Manatus Guettardi, de Blainville. 



HALITHEBIUM FOSSILE, Cuvier. 

 Phocafossilis, Cuvier. 

 Trichechusfossilis, Cuvier. 

 Trichechus molassicus, Jaeger. 

 Manatus Cuvieri, Laurillard. 

 Manatus Cordieri, de Christol. 



HALITHEBIUM BEAUMONTI, de Christol. 



HALITHEBIUM STTJDEBI, de Meyer. 

 Metaxitherium Studeri, de Meyer. 



HALITHEBITJM SEBBESSII, Gervais. 

 Cheirotherium, of Bruno. 

 Manatee, Dugong, Hippopotamus of various French authors. 



Genus TEACHYTHEBiUM, 1 Gervais. 



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

 obtained from the marine calcareous deposit of the Meiocene period at 

 the Keole 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 in the corresponding 

 tooth of the preceding genus, but otherwise resembling it. 



Trachytherium Eaulinii, Gervais, is necessarily the only species known. 



(I) Genus EDENTATUM. 

 Genus EHTTOA, 2 Illiger. 



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

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



1 rpaxfa, rough, and Bijplov. animal, 

 1 pvris, wrinkled. 



