Balæna gibbosa, Gray, Cat. Seals & Whales, p. 90.
Scrag Whale, Dudley, Phil. Trans. xxxiii. p. 259.
Inhab. North Atlantic.
2. RHACHIANECTES.
Rhachianectes, Cope, Proc. Acad. N. Sc. Philad. 1869, pp. 14 & 15.
Cervical vertebræ free. Throat without plaits. Dorsal fin none. Scapula without acromion.
1. Rhachianectes glaucus. The Californian Grey Whale.
Rhachianectes glaucus, Cope, Proc. Acad. N. Sc. Philad. 1869, pp. 17 & 40, fig. 8.
Agaphelus glaucus, Cope, ibid. 1868, p. 225.
Inhab. California, San Francisco.