198 CAENIVOEA. 



46000. Fragment of the distal portion of the tusk ; from the Eed 

 (Fig.) Crag of Suffolk. This specimen is the type, and is 



described and figured by Lankester in the Quart. Journ. 



Geol. Soc. vol. xxi. p. 226, pi. x. figs. I, 5, 6. 



Purchased, 1874. 



40135. Fragment of the basal portion of a very large tusk ; probably 



from the same locality. Purchased, 1866. 



44208. Terminal portion of a crushed tusk ; from the Eed Crag of 

 Suffolk. Purchased, 1873. 



43175. Fragment of a tusk ; from the Eed Crag of Suffolk. 



Wetherell Collection. Purchased, 1871. 



46921. Portion of a tusk, cut and polished ; from the Eed Crag, 

 near Woodbridge, Suffolk. Purchased, 1875. 



40136. Transverse section of a tusk ; from the Eed Crag, near 



"Woodbridge. Purchased, 1866. 



44629. Transverse section of a tusk; from the Eed Crag, near 

 Felixstow, Essex. Purchased, 1873. 



43394. Cast of the basal portion of a tusk of a large male. The 



original (from the Eed Crag of Suffolk) is figured by 

 Lankester in the Quart. Journ. Geol. Soc. vol. xxi. pi. x. 

 fig. 3, and in the Trans. Linn. Soc. ser. 2, Zool. vol. ii. 

 pi. xxii. fig. 3 ; it is now in the York Museum. 



Purchased, 1872. 



43395. Cast of the extremity of a tusk, much compressed laterally. 



The original (from the Eed Crag of Suffolk) is figured by 

 Lankester in the Quart. Journ. Geol. Soc. vol. xxi. pi. x. 

 .fig. 2, and in the Trans. Linn. Soc. ser. 2, Zool. vol. ii. 

 pi. xxii. fig. 4 ; it is now in the Ipswich Museum. 



Purchased, 1872. 



Genus ALACHTHERIUM, De Bus 1 . 



Alachtherium cretsi, De Bus 2 . 

 Hob. Europe. 



As mentioned above, this species is identified by Van Beneden 

 with Trichechus (Trichechodon) huxleyi; but this cannot be con- 

 sidered certain. If the two are really the same, the name huxleyi 

 tas the priority ; and if generically distinct from Trichechus it seems 

 1 Bull. Ac. E. Belg. ser. 2, vol. xxiv. p. 562 (1867). 2 Loc. cit. 



