CETACEA. 139 
Synopsis oF GENERA. 
|, Manatvus. Tail rounded. Grinders 2 or £, tubercular. 
. Hauicore. Tail forked. Grinders 3, flat tipped; upper 
cutting teeth produced, tusk- like. 
3. Rytina. Tail forked. Grinders none. 
1. MANATUS. 
Cutting teeth 2, very small, rudimentary, early deciduous. 
Yanine none. Grinders $—%, with two or three transverse three- 
tubercled ridges. Lips bristly. Back with scattered hairs. Fins 
with four rudimentary hoof-hke nails. Toes surported with pha- 
anges. ‘Tail rounded or truncated at the end. Pelvis bone de- 
ficient ? czecum bifid at the tip. 
Manatus, Rondel, Pisc. 490; Storr. Prod. 41,1780; Cuvier, 
_R.A.; Illiger, Prod. 140,1811; Rafin. Anal. Nat. 61,1815. 
Trichechus, sp. Linn. S. N. ed. 6. 39. ed. 10. ed. 12; Eraleb. 
Mam. 599. 
Odobenus, pars, Brisson. 
Trichecus manatus, Oken, Lehrb. Nat. 687, 1815. 
? Nemodermus, Rafin. Anal. Nat. 60,1815. 
_ The number of grinders varies according to the age or state of 
the specimens. When complete they are 3-3, but the three 
front on each side are often deciduous; hence Home (Puhil. 
Trans. 1821, 390) describes them as —£, and Cuvier as §-4. 
. MANATUS AUSTRALIS. MANATEE. 
_ Grey black. 
Manatus, Rondel, Pisc. 490; Klein, Pisce. ii. 32; Brisson, R. 
_ Anim. 49, 352. 
Kleiner Manate (Manatus minor?), Zimmermann, Geog. ii. 426, 
| 388. 
Lamantin, Condam. Voy. 154; Buffon, H. N. xii. 377, 425. t. 57. 
Trichechus manatus, Linn. S. N. i. 49; Gmelin, S. N. i. 60; 
__Schreber, Saugth. t. 8, cop. Buffon. 
I lanatus australis, Tilesius, Jahrb. i. 23; Ozeretskowsky, Nov. 
Act. Petrop. xii. 375. t.13; Fischer, Syn. Mam. 501; Reichb. 
_ Syn. Mamm. 16; Icon. Cetac, €. 232472; 73; from Huinbotdt. 
_ Anat. Cetac. t. 97, 28, 29. 
Manatus (Trichechus manatus) australis, I/liger, Prod. 110. 
Manatus Americanus, Desm. Mamm. 507; N. Dict. H. N. xvii. 
_ 262.t.96; Home, Lectures Comp. Anat. iv. t. 55; Schreber, 
os 
