162 MEMOIRS OF THE CARNEGIE MUSEUM 
jaw with a groove a little more than half that length; distance between nostrils a 
little more than half interorbital space and less than twice eye; teeth not yet appear- 
ing through the gums; scales apparently as usual in Scoliodon, but little developed 
in the specimen, the body being smooth in places when rubbed forward with 
finger; base of first dorsal equal to distance from eye to first gill-opening, its 
middle almost exactly half-way between ventrals and last gill-opening; second 
dorsal inserted over back of anal; caudal noticeably longer than in specimens 
of S. walbeehnu of the same size, the distance from the pit to the notch on under 
side near tip equal to length of head to second gill-opening; posterior margin of 
pectoral slightly concave ; color bluish-olive above, pale below; free margin of first 
dorsal and upper and lower edge of caudal black. 
The above description is based on a single young specimen, eleven inches long 
apparently very recently a fcetus (see figure), from 'Takoa. Except for the smoother 
body, absence of teeth and longer tail (all feetal characters?) the specimen does not 
seem to differ from specimens of Scoliodon walbeehmi from Manila of the same size. 
One specimen of 8. walbechmi from Manila one-fourth inch shorter in total length has 
the scales evident over whole body and fins, the teeth well through, and the umbilical 
scar absorbed. If our specimen is a recent foetus of this species, as it may be, it is 
then necessary to assume either that it is somewhat overgrown for its age, or that a 
marked shortening up of both body and tail occurs at about the time the teeth 
appear and the scales attain their full development. 
6. Triakis scyllium Miller & Henle. 
Formosa (Jordan & Evermann). 
7. Galeus japonicus Miiller & Henle. 
Formosa (Jordan & Eyermann). 
Family SPHYRNID A. 
8. Sphyrna zygena (Linnzus). 
Formosa (Jordan & Evermann). 
Family ALOPIIDA. 
9. Alopias vulpes (Gmelin). 
Two specimens from Takao, ten and one-half inches to base of lower caudal 
lobe; twelve inches to tip of tail. 
Family SQUALID. 
10. Squalus japonicus Ishikawa, (?). 
A foetus from Formosa (Jordan & Evermann). 
