144 CETACEA. 



Rytina, Illiger, Prod. 141, 1811 ; Oken, Lehrb. Nat. 685 ; Wag- 



ler, 33. 

 Rhytina, Brandt, Mem. Acad. Imp. Peters, vii. 1846; Symb. 



Sirenologicce, 1846. 



Rityna, Lesson, Nov. Reg. Anim. 155, 1842 (misprint). 

 Stellerus, Desm. ; Cuvier, R. A. i. 275. 

 Hydrodamalis, Retzius. 



Dr. Knox (Cat. Prep. Whale, p. 37, 1838) shows that the 

 substance in the palate which Steller describes, and which has 

 been mistaken for teeth, is only a horny skin of the bent- down 

 portion of the two jaws, common to this animal and the Dugong. 

 This suggestion has been adopted by F. Cuvier (Cetac. 377) and 

 Brandt in his Sirenologia. The latter figures them, and ex- 

 hibits their structure under the microscope. This horny sub- 

 stance bears evidently a considerable analogy to the baleen of 

 the common whale. 



1. RYTINA GIGAS. The MORSKAIA KOROVA. 

 Black. 



Manate seu Vacca marina, Steller, N. Act. Petrop. ii. 294. 



Trichecus Manatus, Mull. Prod. Z. Dan. 



Trichecus (Manatus) borealis, Gmelin, S. N. i. 60; OJcen, Lehrb. 



Nat. 685. 



Manatus gigas, Zimmerm. Geog. ii. 426. 



M. borealis, Tilesius,Jahrb.i. 23 ; Pallas, Zool. Ross.Asiat.i.272. 

 Manatus Stelleri, Ozeretskowsky, Nov. Act. Petrop. xiii. t. 13. 



f. , embryo. 

 Rytina Stelleri, Illiger, Prod. 141; Desm. N. Diet. H. N, xix. 



574; Reichb. Syn. Mam. 15; Icon, Cetac. t. 22. f. 69, from Stel- 

 ler; Anat. Cetac. t. 25, from Brandt. 

 Stellerus borealis, Desm. Mam. 510; Lesson, Cetac. 88 ; Jar dine, 



Nat. Lib. viii. 307. 

 Rytina borealis, F. Cuvier, Cetac. 41. 

 Rityna Stelleri, Lesson, N. Reg. Anim. 155. 

 Rhytina borealis, Brandt, Mem. Acad. Petrop. 1846 ; Symb. 



Sirenolog. 141. t. 1-4, skull; t. 5, ideal figure. 

 Stellere, Cuvier, R. A. i. 275; Oss. Foss. v. 256. 

 Whale-tailed Manate, Penn. Quad. ii. 292. 

 Hab. Arctic Ocean. Behring's Straits. Skull, imperf. Mus. 



St. Petersb. 



The Sea Ape, Penn. Quad. ii. 301 (Trichecus Hydropithecus, 

 Shaw,Zool.i.247; Manatus Simia, Illiger, Abh. Berl. Akad.lSIS ; 

 M. ? Hydropithecus, Fischer, Syn. 502, all from Steller) is per- 

 haps another animal of this family, if it is not a Seal ? 



