34 CETACEA. 
Professor Eschricht observes that ‘“ the Greenland Tikagulik, 
or Balena rostrata of O. Fabricius, may be distinct from the Nor- 
wegian Vaagekval or B. minor,” 4th Mem.157. Our Greenland ~ 
skull does not appear to differ from that of the English skeleton, 
4, PHYSALUS. 
The head elongate, flattened. The eye is near the angle of the - 
mouth, and the blowers lunate, covered by a valve and separated 
by a longitudinal groove. The throat and chest with deep longi- — 
tudinal folds and very dilatile. The dorsal fin compressed, fal-— 
cate, § the length of the body from the nose, behind the line over ~ 
the orifice of generation. The pectoral moderate, about % the — 
length of the body, } the length of the body from the nose, of - 
four fingers. The vent under the front of the dorsal fin. Male 
organs 3 from the chin, in front of hme of dorsal; female near 
vent. 
Vertebre 54 to 64; cervical vertebre all separate and free. 
The skull is broad, depressed ; nose broad, gradually tapering, 
with straight sides, with a narrow interorbital space.—Cuv. Oss. 
Foss. v. 373. t. 26. . 
The baleen is short, broad, triangular, rather longer than broad — 
at the base, and edged with a series of elongate, unequal, bristle- 
like fibres, which become much thicker and more rigid near the 
upper tip. It is mternally formed of one or two crowded layers 
of thick tubular fibres, covered on each side with a thin coat of © 
enamel, which becomes thinner and thinner near the edge, where — 
the fibres are free; always twisted. 7 
These animals are often called Razor-backs, Piked Whales, by — 
the sailors. { 
The baleen or fin of the Finners is only used to split into false” 
bristles, but for this they are inferior to the Southern or lowest 
kind of baleen of the Balene. 4 
Balenapterus, sp. Lacep. 
Balenopterus, sp. Lacep.; F. Cuv. D.S. N. 1x1. 518. 
Balznoptera, sp. Lacep. Cet. , 
Balznoptera, Sect. 2 & 3, Gray, Zool. Ereb. & Terror, App. 50. 
1846. . a 
Pterobalena, pars, Eschricht, Nord Wallthier, 1849. 
(Catoptera or) Cetoptera, Rafin. Anal. Nat. i. 219, 1815. 
Mysticetus, sp. Wagler, N.S. Amph. 33. 
Balzna, sp. Linn.; Illiger, Prod. 142, 1811. 
Physalis, Fleming, Brit. Anim. 1828. : a 
Physalus, Lacep. Cet.; Gray, Proc. Zool. Soc. 1847, 90; Brandt. 
Physelus, Rafin. Anal. Nat. 60, 1815. a 
