18 ART. 4.— BASEFOKD DEAN*. 



preserved specimens of Chimaera. In PI. II, Fig. 10, the lower 

 apertures are seen to be marked by tumid eminences (o. /.<?.) lying just 

 within the opening above referred to. In the same figure there is a 

 well defined central area (c.) in which is moulded the rounded 

 egg-containing portion of the case ; also at the sides a wide flat tract 

 (;».) in which the lateral flaps of the egg-case are formed. In the 

 crease at the outer margin of this area there happened to be present in 

 the specimen a small portion of the lateral flap of an egg-case here 

 worthy of mention since it afterward proved of value in identifying a 

 separately collected egg-case of this form. Both right and left ovaries 

 were present in the specimen, though only one of them has been 

 figured. In size and position they correspond to Chimaera. The 

 kidney is apparently a less conspicuous organ than in Chimaera ; it is 

 greatly flattened relatively, and is entirely concealed by the pigmented 

 peritoneum. The urinal papilla is similar to that of Chimaera. 



V. The Egg-Case. PL II, Figs. 12, 12a, 12b. 



Two egg-cases of an undetermined chimaeroid are preserved in 

 the collection of the Imperial University of Tokyo, and a similar 

 one, but less perfect, 1 was able to secure for Columbia University, 

 through a local collector. The locality in which these egg cases were 

 obtained corresponds to that of " Harriotta " pacifica, and, by an ex- 

 amination of the oviducts in this form and by a comparison of a portion 

 of an egg-case taken from the oviduct, I find that the problematical 

 specimens can be referred to " Hariotta " with reasonable certainty. 



From an examination of the specimens preserved in Tokyo, 

 which, by the way, are alcoholic and quite -well preserved, one is at 

 first given the impression that the eggs belong to Callorhynchus : 

 there is the same broad lateral flange and -the same, general shape of 



