36 



CHIM^ROID FISHES AND THEIR DEVELOPMENT. 



Harriotta{?). 



Capsule (fig. 19) with case outlined like a short-handled spoon; lateral web wide and evenly- 

 transparent, strengthened by an even series of thickened costal ridges. Dorsal valve terminates in 

 a broad transverse lip subterminal; its lateral rims have ruffle-like serrulse, which are most marked 

 midway between hinge and anterior lip, and fade away anteriorly and posteriorly. No dorsal keel; 

 on the contrary, a shallow groove extends along the dorsal wall of caudal sheath. Caudal pores in 

 a series of decided slits; the largest, in the middle of the series, open ventrad, although they appear 

 also on the dorsal side as a marked surface featureof the capsule. Capsule smooth, parchment-like, pale. 

 iS ig 20 



--^■. 



Fig. 18. — Egg-capsule of Chimaeta coUiei. Fuget Sound. (Ventral aspect.) Natural size. 



Fig. 19. — Egg-capsule of Harriotta (?) . North Atlantic. After specimen preserved in U. S. National 



Museum. (Ventral aspect.) Natural size. 

 Fig. 20. — Egg-capsule of Rhinochimaeta indica (" Callorhynchus indicus"). Indian Ocean. Alter Alcock. 



(Ventral aspect.) Three-quarters natural size. 



This interesting specimen is preserved in the National Museum at Washington, 

 where it bears the number 22793. The present writer is indebted to the Curator 

 of the Department of Fishes, Mr. Barton A. Bean, for his courtesy in bringing it 

 to his attention, and to the Museum for the privilege of describing it. Its 

 history is briefly as follows: It was taken, 1879 (on trawl line), b}^ the Gloucester 

 fishing vessel of Capt. G. A. Johnson, in water of 375 fathoms, lat. 42° 47', long. 

 63° 10'. It obviously does not belong to the foregoing genera, but from its resem- 



