274 



Prof. C. Chilton on 



tlie maxillipeds would be found in the male only, and was 

 probably to be looked upon as a secondary sexual cliaracter. 

 Oa December 12th, 1916, I received from Mr. C. R. Gow, 

 of the Moko Hinou Lighthouse, a small collection of Crus- 

 tacea which liad been taken between tide-marks on Moko 

 Hiiiou, a group of islands off the east coast of Auckland, 

 situated about 50 miles from Cuvier Island, where the type- 

 specimen was obtained. Among these Crustacea there are 

 fortunately a few specimens of Ilyale grenfelli. Most of 

 these are males, showing the peculiar characters in the 

 maxillipeds and the second gnathopod as described. One 



Fig. 1. 



Ilyale grenfelli, $ . Maxillipeds. 



specimen is a female, 5 mm. long, bearing five large eggs in 

 the brood-pouch, and I am therefore now able to describe the 

 characters of the female. In it the maxillipeds (fig. 1), 

 though, perhaps, a little larger than in the majority of the 

 species of Ilyale, have the terminal joints only slightly 

 enlarged, and not showing the special form nor the numerous 

 long setse characteristic of the male ; the carpus bears one 

 long seta at its outer distal angle and a few on the inner 

 margin near the distal angle, but there are none" on the 

 surface of the joint itself ; in the propod the inner margin 



