288 APPENDIX. 
Clymenia crotaphisca. 
Delphinus crotaphiscus, Cope, 1. c, 1865, p. 203. 
C. crotaphiscus, Gray, 1871, p. 72. 
Habitat ? 
Cranium, 16 inches; beak, 10 inches, flat; width at notch, 3§ inches. Teeth, J|. Temporal 
fossa small; a keel in front of superior nares. Skull only, Mus. Peabody Academy. 
Clymenia longidens. 
Delphinus longidens, Cope, Proc. Phil. Acad. 1866, p. 295. 
Habitat? 
Teeth, ff. Skull, 15.25 inches. Beak, to maxillary notches, 8.25 inches. Breadth at notch, 
3.55 inches. Skull only, S. I. 
Professor Cope, in criticising Doctor Gray's arrangement, suggests that Steno, Delphinus, Lageno- 
rhynchus, and Tursio can form but one genus if further characters can not be brought forward. 
While this criticism might be somewhat justified by the confused arrangement of the Catalogue of 
1866, yet it would seem as if that of 1871 to some extent remedied the difficulty, and that the 
groups there indicated are natural ones, and recognizable, though perhaps some of them are of 
less value than supposed by Doctor Gray. In this new light Professor Cope's view would hardly 
seem tenable. 
Clymenia plagiodon. 
Delphinus (Tursio) plagiodon, Copie, 1. c, p. 296. 
Habitat? 
Skull, 17 inches. Beak to notch, 9.8 inches. Width at notch, 3.55 inches. Greatest width 
of skull, 7.25 inches. Teeth, ff. Triangle advancing a little before the last tooth. Resembles 
Gray's figure of C. doris. Skull only, S. I. 
Genus TursiopS, Gervais. 
Tursiops, Gervais, Mammif., p. 323. 
Tursio, Gray, 1866, p. 254. 
Type D. tursio, Linn. 
Tursiops Gillii. Outline, p. 102. 
T. Gillii, Dall, Prel. Descr. Proc. Cal. Acad, v, January, 1873. 
Cowfish, Scammon, Proc. Phil. Acad. 1869, p. 45. 
Monterey, California. 
Dull black, lighter on the belly. Dorsal low, falcate. Teeth, §£ to £f? 
A lower jaw of the present species, which is the only portion of the animal yet collected by 
Captain Scammon, has twenty-two teeth on each side. The rami are solid and strong, especially 
their anterior halves. The symphysis is short, extending backward as far as the fifth tooth. The 
gonys is more produced downward than in any of the species figured by Gray, and is evenly 
rounded upward in front. The ramus has the least height about the middle of the tooth line, 
which rises before and behind. The anterior six teeth are smaller than the others, and much more 
incurved. The teeth are solid and conical, with the tips attenuated and sharply pointed, which 
accounts for the ease with which they may become truncated. The outer margins of the alveoli 
are remarkably rough, being produced in arborescent points resembling the septa of some ammon- 
ites. The gonys is somewhat keeled. The condyles are broad, of a rounded triangular shape, 
