6 m;T. 3.— bàshford dean. 



deposited at a time, and that they are, for several hours at least, 

 attached to the fish before they are deposited. During this time they 

 han^ freelv into the water, attached only by the terminal of the 

 narrow end. 



Comparing this egg case in greater detail with those of Chimaera 

 colliei and C. monstrosa (as shown in Grieg's figures), I. find that the 

 interlapping lamellae at the opening arc about 40 in number, as 

 opposed to 75 in C. colliei. The extent of these interlapping lamellae 

 measure ï l 16 the length of the entire ease, as opposed to 1 / B in C. colliei 

 and '/ 9 in C. monstrosa. At the narrow end of the egg ease the 

 marginal perforations extend over somewhat more than '/ 3 of the 

 length of the vir^ ease, as opposed to somewhat under l j 3 in C. colliei 

 and '/c '■' V- monstrosa. Here 140 perforations are present as opposed 

 to about 80 in C. colliei and about 70 in C. monstrosa. The narrow 

 portion of the egg case (the marginal flaps not considered) measures 

 about y, ; the width of the widest region : the corresponding width in 

 C. colliei is about '/ t and G. monstrosa 1 /.-,- The marginal lappets are 1 j i the 

 width of those in C. colliei and ~/ :; those in (.'. monstrosa. The anterior 

 end of the egg case, it may finally lie noted, shows more distinctly 

 than in other forms a lobe like dilation, and the marginal flaps in this 

 region are distinctly directed towards the keeled face of the egg ease. 

 The keel in this species is proportionally lower than in the others. 



CHIIYI/ERA MITSUKURII, v ,5. (PI. /, Fig. n. 



Among the rarities in the zoological museum of the Imperial 

 I niversity of Tokyo, are the e^of-cases * of three different chimaeroids. 

 All were collected in the neighborhood ofMisaki. One of them, with 

 wide flap like margins, resembling the egg-csse of Callorhynchus, has 



* I wish to acknowledge with especial thanks tin' kindness of Professor Mitsükuri in 

 f lacing them :it my disposal for description. 



