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. walbeehmi 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 foetus (see figure), from Takoa. Except for the smoother 

 body, absence of teeth and longer tail (all fcetal characters?) the specimen does not 

 seem to differ from specimens of Scoliodon walbeehmi from Manila of the same size. 

 One specimen of S. walbeehmi 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, 



(>. Triakis scyllium Midler & Henle. 

 Formosa (Jordan & Evermann). 



7. Galeus japonicus Midler & Henle. 



Formosa (Jordan & Evermann). 



Family SPHYRNIDyE. 



8. Sphyrna zygsena (Linnseus). 



Formosa (Jordan cfc Evermann). 



Family ALOPIIILE. 



9. Alopias vulpes (Gmelin). 



Two soecimens 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 fa»tus from Formosa (Jordan & Evermann). 



