468 PROCEEDINGS OF THE NATIONAL MUSEUM vol.86 



8 (6). Species not spotted with black, color uniform 9 



Black spots present on dorsal surface punctulatus Risso 



9 (8). Profile of functional surface of typical teeth of upper jaw of 



adults a regular curve, teeth without a projecting blunt 



crown or cusp 10 



Profile of functional surface of typical teeth of upper jaw of 

 adults an irregular curve, teeth with a projecting blunt 

 crown or cusp 11 



10 (9). Distance between nostrils usually greater than horizontal 



diameter of orbit; eyes of embryos at time of birth large 

 (horizontal diameter of orbit less than 2 times in length of 



snout) canis ( Mitchill) 



Distance between nostrils usually less than horizontal 

 diameter of orbit; eyes of embryos at time of birth not 

 proportionately large (horizontal diameter of the orbit 

 more than 2 times in length of snout) schmitti, new species 



11 (10). Origin of first dorsal behind inner angle of pectoral; inner 



labial fold reaching farther forward than outer^-griseus Pietschmann 

 Origin of first dorsal over or in advance of inner angle of 

 pectoral; out«r labial fold reaching farther forward than 

 inner antarcticus Giinther 



12 (5). Inner labial folds usually reaching farther forward than 



outer; teeth of adults usually without accessory blunt 



cusps or crowns calif omicuB Gill 



Outer labial folds usually reaching farther forward than 

 inner; teeth of adults frequently with accessory cusps 

 on either or both sides of principal crown mustelus (Linnaeus) 



13 (1). Mustelus asterias Cloquet and Mustelus manazo Bleeker 



are white-spotted species. In all the specimens ex- 

 amined these spots have been present although not al- 

 ways distinct in those that have been in preservative 

 for a long period. Pietschmann ' regards these two 

 species as identical. I have not examined a large 

 enough series of M. asterias to form an opinion on this 

 point, but certainly M. manazo has a wide range in the 

 Pacific; specimens have been examined from San Diego. 

 Calif., and Wanganui, New Zealand, as well as from the 

 northwest Pacific. The type but not the paratypes of 

 Mustelus abbotti Evermann and Radcliffe belongs here. 



» Zur Unterscheidung der beiden europaiscben Mustelus-Arten, Zool. Anz., vol. 33, p. 169-164, 1908. 



U.S. GOVERNMENT PRINTJNS OFFICEil93S 



