3. RTTINA. 365 



H. Hemprichii (Nake), Ehrenb. Symh. Phys. ii. 

 H. Lottum, Ehrenb. Symb. Phys, i. 



Inhab. Red Sea. 



Observed by Dr. Eiippell " swimming among the coral banks on 

 the coast of Abyssinia, near the Dalae Island." The fishermen har- 

 pooned a female, which he dissected. It was 10 feet long. 



The Arabs stated that they live in pairs or small families ; that 

 they have feeble voices, feed on aJgce, and that in February and March 

 bloody battles take place between the males, which attain to 18 feet, 

 &c. — Penny Cydopii'dia, art. Whales, 



This is probably the same as the Dugong from India and Australia ; 

 but I have not had the opportunity of comparing the skull and skins 

 as in that species. 



b. Teeth none. Rytinina. 

 3. RYTINA. 



Cutting-teeth, canines, and grinders none. Muzzle blunt, lips 

 double, outer upper bristly. Ears none. Eyes covered with a 

 blinking membrane. Skin covered with a thick, brittle or easily 

 cracldng fibrous ejndermis. The fore feet with claw-Uke callosities, 

 not supported by phalanges. The tail horizontal, bifid. Teats two, 

 pectoral. Pelvic bones distinct. Stomach simple. 



Sirenia edentula sen Rhytiuese, Brandt, Symb. Sirenol. 1849. 



Manate seu Vacca marina, Steller, Acad. Petrop. Nov. Cotnm. il. 294. 

 t. 14. 



Rytina, Illiyer, Prodr. 141, 1811 ; Okon, Lehrb. Nat. 685 ; Wagkr, 33 ; 

 Beer, Mini. Acad. Peter sb. 1840, 111 ; Sirenoloyia, 1849. 



Rhytina, Brandt, Mem. Acad. Imp. Petersb. vii. 1846 ; Symb, Sireno- 

 loyia, 1846. 



Rityna, Lesson, Nouv. Rig. Anim. 155, 1842 (misprint). 



Steilerus, Desni. ; Cuviei-, P. A. i. 275. 



Hydrodamalis, Retzius. 



?L)ystomus, O. Fischer, Zooyn. 19. 



Nepus, Gotth. Fischer von Waldheim. 



Stellere, Cuvier, Rey. Anim. 



Dr. Knox (Cat. Prep. Whales, 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 

 iDeen adopted by F. Cuvier (Cetac. 377) and Brandt in his ' Sireno- 

 logia.' The latter figures them, and exhibits their structure under 

 the microscope. This horny substance bears evidently a considerable 

 analogy to the baleen of the common whale. 



Rytina gigas. The Morskaia Korova. 



Black. 



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



Trichecus Manatus, 3Iidl. Prodr. Z. Dan. 



Trichecus (Manatus) borealis, Gmelin, S. N. i. 60; Oken, Lehrb. Nat. 685. 



