

CETACEA. 31 



527. n. 4), from a wooden model made by the Aleutians : and 

 Pallas (Zool. Ross. Asiat. i. 288) calls it Balcena Allamack. The 

 pectoral fins are long; they, and the underside of the tail are 

 white. 



This genus is also found in the seas of Java, for there is an im- 

 perfect skull, brought from that country by Professor Reinwardt, 

 in the Leyden Museum. F. Japon. 24. 



Pallas, under the name of B. Boopsl (Zool. Ross. Asiat. 291), 

 describes a whale which appears to belong to this genus, found 

 at Behring's Straits by Steller, when he was shipwrecked. The 

 head was %, the pectoral fin -f , the entire length, and the vent 

 fe from the head, as by the following measurement : length, 

 50 feet ; head, 12 feet ; pectoral fin, 10 feet long and 5 feet wide ; 

 tail, 16 feet wide, and the vent 35 feet from the head. If these 

 measurements are correct, the pectoral fin is shorter and much 

 wider than they generally are in this genus. The position of the 

 dorsal fin is not noted. 



In the Zoologia Ross. Asiat. 293, Pallas described a whale 

 under the name of B. musculus, observed by Merle at Kamts- 

 chatka. It was long and slender, ash-brown, white-clouded 

 above, snow-white beneath, and spotted on the sides. It was 

 22 feet 6 inches long ; the dorsal was 6 feet from the tail, and 



1 foot 1 1 inches high ; behind the fin the back was 2-keeled ; 

 the pectoral fin was rounded at the end, and 10 feet 7 inches 

 distant from the tip of the beak, 4 feet 2 inches long and 1 foot 



2 inches wide : behind the vent, 7 feet before the tail, and 3 feet 

 from the vent, is a white kind of fin, and the genital organs are 

 1 foot 3 inches before the vent. If this description and these 

 measurements are correct, it must be a most distinct species, if 

 not a peculiar genus : the pectoral fins are nearly in the middle 

 of the body, and I know of no whale with a fin behind the vent 

 beneath, and with the genital organs nearly under the pectorals. 

 The pectoral is almost the entire length. 



3. BAL^ENOPTERA. 



Head elongate, flattened. Throat and chest with deep longi- 

 tudinal folds and very dilatile. The dorsal fins compressed, 

 falcate, f the length of the body from the head and behind the 

 line above the orifices of generation. The pectoral fins moderate, 

 i the length of the body, the length of the body from the 

 head. 



The second and third cervical vertebrae united by the spinous 

 process, rest well-developed and separate. The lateral processes 

 of the second cervical vertebra rather expanded and ring-like. 



Vertebrae 46 to 48. 



