Tin: LONG-SNOUTED CHIMAEROID OF JAPAN. 19 



the egg-surrounding part. As Callorhynchus, however, is not known 

 to occur in Japanese waters, and as closer study brings out distinct 

 differences in these egg-cases, one would naturally refer them to 

 " Hariotta," even if a fragment of tlie undoubted egg of this form 

 had not been discovered. The egg-case, PI. II., Fig. 12, is of ex- 

 traordinary size, measuring over 26 cm. in length. A dried specimen 

 measures lfi.5 cm. The median portion of the capsule resembles that 

 of Chimaera, save in the greater proportional length of its wider, or 

 exit-end. On the longer, narrower end, however, no keel-like ridge is 

 present. At the immediate sides of the narrow and (Fig. 12a) the 

 apertures for ingress of water are restricted to a shorter space, but, 

 apparently in compensation, are produced farther lateral : they do not 

 pass through to the opposite side. The exit-end of the egg-case 

 (Fig. 126) is furnished with a series of interllapping lamellae somewhat 

 as in Chimaera, but they are restricted to a shorter space. I notice 

 also in an egg-case which bears evidence of having been long deposited, 

 a large mass of horny fibres closely felted together, concealing 

 this region of the es:2'. These fibres arise both from the outer margins 

 of the opercular-like folds, as well as from the egg surface lying be- 

 tween them. The lateral flaps of the egg-case recall of Callorhyn- 

 chus : they are strengthened by sixty or more thickened and folded 

 ribs, and the marginal line is smooth and delicate. In texture, shape 

 and color the entire case resembles strikingly a " branch " of a heavy 

 fucoid alga. 



VI. General Considerations. 



At the time of its original description, Harriotta was said to 

 possess " no cephalic organ," and that its claspers were " small and 

 simple." From these characters, unique among chimaeroids, a reader 

 was naturally led to expect that the new type might prove of value as 



