o 



86 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



arranged above, 1 + 1 + 1, the median largest; the lower, 

 3 + 6, the third and fourth largest. In the female, the upper 

 teeth are i + i, the second denticle largest, the lower, about 

 six, all turned the same way, the second rather largest, the 

 others on a slanting base and progressively decreasing. 



In He^tranchias deani, the lower teeth in the female 

 have the cusps placed nearly on a level, subequal in size, 

 except the second, which is much higher than any of the 

 others. The upper teeth are much more oblique than in 

 He'ptranchias indicus. 



This species is known to us from an adult female (No. 

 12620, Stanford University Museum) taken at Misaki by 

 Kumakichi Aoki with hook and line in deep water. It was 

 studied at the time by Dr. Bashford Dean and the senior 

 writer. We take great pleasure in naming the species for 

 that accomplished student of Selachology. 



Stanford University, 



March 10, 1901. 



