Rhytina (ritina)

[NL. (Steller), Skull of Steller's Sea-cow ( Rhytina stelleri). ler's or the arctic sea-cow, R. stelleri or R. gigas, which has no teeth, but horny plates functioning as such. The head is small; the tail has lateral lobes; the fore limbs are small; the hide is very rugged; the cæcum is simple, and there are no pyloric cæca; the cervical vertebræ are 7, the dorsal 19, the lumbar and caudal 34 to 37, without any sacrum. See sea - cow. Also called Stellerus and Nepus.