Dr. J. E. Gray on the Whalebone-Whales. 351 
T have been induced to refer it to this genus on account of the 
high, triangular, roundish form of the canal of the spinal mar- 
row of the cervical vertebrae, and the form of the lower jaw. 
Lilljeborg referred it to Balenoptera on account of the form of 
the blade-bone; but the two species of Megaptera differ in the 
form of that bone. The rib, as well as the blade-bone, is more 
like that of Physalus than Megaptera; but I believe that it may 
be a genus distinct from both. These observations are founded 
on some drawings of the bones kindly sent to me by Professor 
Lilljeborg. 
4. Megaptera Nove-Zelandie, Gray, Proc. Zool. Soc. 1864, 
p- 207, f. 4 (ear-bones). 
Hab. New Zealand. LEar-bones in British Museum. 
There are, no doubt, other species of this genus,—as the Ber- 
muda Humpback (Megaptera americana), described by Dudley, 
Phil. Trans. xxxui. 258; and the Japanese Humpback, or 
Kugira (Megaptera Kugira), figured by Temminck in the ‘ Fauna 
Japonica,’ from a drawing brought home by Siebold, under the 
name of Balenoptera antarctica, t. 30 (not t. 23). 
Mitchell, the traveller in Australia, mentions a Humpback 
Whale inhabiting Portland Bay, Australia Felix; and others 
have been mentioned as inhabiting Terra del Fuego, Staten 
Land, by Cook, and Kamtschatka and Behring’s Strait by 
Pallas. 
B. The true Finners have a high, erect, compressed, falcate dorsal fin, 
a moderate-sized pectoral fin, with stout arm-bones and short fingers, 
joints 4 to 7; and the neural canal of the cervical vertebre is broad 
and low. 
a. The dorsal fin is about three-fourths the entire length from the snout ; 
and the cervical vertebre are not anchylosed together. The neural 
canal oblong, transverse. Ribs 14 to 16. 
2. BENEDENIA. 
The second cervical vertebra with two short lateral processes. 
Ribs 15; first smgle-headed, with a compressed internal process. 
The ramus of the lower jaw is moderate ; lower jaw-bones thick, 
convex on the side. Vertebrze 60. 
Benedenia Knox, Gray, Proc. Zool. Soc. 1864, 209. 
Coronoid process of the lower jaw low and broad. 
Hab. Coast of Wales; Northern Seas. Skeleton, Brit. Mus. 
Mr. Flower has shown me the drawing of a skeleton of what 
appears to be a second North-Sea species of this genus, which 
has a well-developed ramus to the lower jaw. 
