1. Physalus antiquorum.

B.M.

Ribs 14·14.

Physalus antiquorum, Gray, l. c. pp. 144 (figs. 29-32), 374; Synops. Whales & Dolph. p. 2, t. 1. f. 6 (baleen), t. 32. f. 5, 6 (cervical vertebræ); Flower, P. Z. S. 1869, p. 604, pl. 47 (male).

Balænoptera musculus, Van Beneden, Ostéogr. Cét. t. 12 & t. 13. figs. 11-24.

Inhab. North Sea, Greenland, Hampshire, &c.

2. Physalus Duguidii.

Ribs 15·15.

Physalus Duguidii, Gray, l. c. p. 158, figs. 33-35; Synops. Whales & Dolph. p. 2.

Inhab. North Sea, Orkneys.