THE LONG-SNOUTED CHIMÄ.EROID OF JAPAN. 5 



species cannot be accurately determined, since all specimens have been 

 discolored in alcohol. The general ton«' of the trunk, however, seems 

 to have been plumbeous, darker above than below. The muzzle is 

 white, and this color extends forward along the sides and ventral mar- 

 gin of the greatly produced snout. No definite markings are present. 

 In the specimens examined the sides of the trunk show many transverse 

 foldings which I have not observed in similarly preserved specimens 

 of Chimaera, and they are probably to be interpreted as symptoms of 

 abyssal living. The dorsal fins are margined with a dusky band, and 

 the paired fins are darkest along their anterior margin. The dorsal spine 

 differs little from that in the other genera ; if anything, it is some- 

 what more delicate, and I cannot confirm in " H" pacifica at least the 

 presence of the " broad triangular spine " which Goode and Bean have 

 laid stress upon in their definition of the genus. I noticed in one 

 Japanese specimen, the best preserved, in fact, that the floor of the 

 sensory canals is in many places black, a condition which seemed at 

 first due to the presence of foreign matter. Closer examination, how- 

 ever, showed that this was normal pigmentation, and traces of it were 

 afterward found in other specimens. 



The clasping organ (mixipterygium) of the male is indicated in 

 PI. I, Fig. 8 (its tip at c) : it is essentially similar to that in Callor- 

 hynchus. Near the antero-proximal rim of the ventral fiti occurs the 

 usual protractile organ at Fig. 8 a (its tip at />); it preserves 4 anterior 

 marginal denticles and the same number cccurs on its fellow. Its 

 sharply truncated lobate end distinguishes it from the similar structure 

 in Chimaera. The mixipterygium is remarkably long and slender, its 

 supports combining to form a single element, Its distal end is en- 

 larged, globular, and is furnished with dermal denticles, as shown in 

 the Fig. 8. The frontal clasper, 8 <J, differs little from that of 

 other recent chimaeroids ; its dermal denticles, however, are fewer (but 



