ZooL— Vol. II.] JORDAN &- STARKS— JAPANESE FISHES. 385 



teeth with the first and last cusps very small, the second large and the suc- 

 ceeding ones except the last subequal and half the size of the second. The 

 following is the formula of cusps, the addition marks separating sizes: 

 1 + 1+3 + 1; 1 + 1+4 + 1; 1 + 1+5 + 1; 1 + 1+6 + 1. Eye very large, the width 

 across iris nearly half the length of snout. 



Dorsal with the anterior oblique edge a little longer than its base— the fin 

 inserted before anal a distance equal to the anterior margin of the anal. 

 Height of anal scarcely more than half that of dorsal; its base equal to base 

 of dorsal. Ventrals long and low, but a little higher than anal, their anterior 

 oblique edges contained twice and a fourth in their base. The anterior edge 

 of pectoral is contained about once and a half in head. Lower lobe of caudal 

 is contained four and one-fourth times in upper lobe. 



The color in life is plain brown, paler below. In a photograph in the 

 Imperial University a few whitish spots are shown. 



Comparing an adult female specimen of Heftranchias 

 deani from Misaki with the excellent figure of Heftranchias 

 indicus given by Macdonald and Barron of a specimen 

 from Bass Straits, the following differences are apparent. 



The snout in the Japanese species is longer and more 

 pointed. The gill-openings rise much higher, their upper 

 edge on the level of the spiracle. The more marked differ- 

 ence lies in the teeth. As figured by Macdonald and Bar- 

 ron, the teeth are different in the two sexes, the cen- 

 tral tooth above only being alike in the two. In the 

 male of Heptranchias indicus the denticles diverge from an 

 axial line, or principal fang, in each lower tooth, the upper 

 teeth having two denticles at base of the central point. In 

 the female the principal fang and all the denticles in the 

 lower teeth diverge from the central line of the whole jaw. 



Heptranckias deani, sp. nov. — a, lower teeth; b, lower median tooth; c, upper tooth. 



In the upper teeth there is but one denticle, at the base 

 of the larger one; these teeth are nearly erect. In other 

 words, the upper teeth in the male have the denticles 



