40 RHACHIANECTES. MEGAPTERA. 
Fig. XV. BALEEN WHALE ATTACKED BY KILLER WHALES. 
Riverside Nat. History. 
14. Rhachianectes. 
Rhachianectes Cope, Proc. Acad. Nat. Scien. Phil., 1869, p 
Type A. glaucus Cope. 
Head small, body elongate; pectoral fin narrow; no dorsa 
skin of throat smooth; baleen short and coarse. 
26. glaucus (Agaplelus), Cope, Proc. Acad. Nat. Scien. Phil., 
1s ase 
glaucus (Rhachtanectes) Elliot, Syn. N. Am. Mamm., rgo1, p. 
Gray WHALE. 
Type locality. Coast of California. 
Geogr. Distr. Coast of Lower California to north Pacific 
Arctic Oceans; Okhotsk and Bering Seas. 
Se 0. 
1 fan: 
1869, 
Q. 
and 
Genl. Char. Superior outline of head convex; size moderately 
large. 
Color. Mottled gray, sometimes blackish. 
Measurements. Total length, 36 to 4o feet. 
15. Megaptera. 
Megaptera Gray, Erebus and Terror, Zodl., 1846, p. 16. 
Balena boops Linneus. 
Megapteron Gray, Erebus and Terror, Zodl., 1846, p. 61. 
Kyphobalena Eschr.. Nord. Wallth., 1849, p. 56. 
Type 
