Chilton. — On New Zealand Sessile-eyed Crustacea. 253 



The third specimen is a female with a great many young in the pouch 

 beneath the body. It is smaller than the others ; body |f inch in length ; 

 it also has the body broader, and the segments do not gape so much at the 

 sides. 



I can find no important character by which these specimens can be dis- 

 tinguished from Oyamus ceti, as described and figured by Bate and West- 

 wood. The penultimate joints of the last three pairs of legs are not quite 

 so stout as shown in their figure, but this is evidently a character liable to 

 variation according to age, etc. The young taken from the pouch of the 

 female closely resemble those figured by Bate and Westwood on page 90. 

 Genus Podocerus, Leach. • 

 (Cat. Amphip. Crust. Brit. Mus., p. 252.) 



I have taken in Lyttelton Harbour several specimens of a species which 

 I have no doubt is the same as Wyvillea longimanus, Haswell. 



Mr. Haswell s genus will, I think, have to be abandoned, for it appears 

 to have been founded on a misconception of portions of the animal in ques- 

 tion. The two chief characters of his genus are the very large second 

 gnathopoda and the structure of the terminal pleopoda. The large second 

 gnathopoda are however only found in the male, the female has them quite 

 small. This is frequently the case with Podocerus. It is rather strange 

 that Mr. Haswell has not seen the female, for I have found it fully as 

 abundantly as the male ; possibly it was overlooked, for it is usually smaller 

 than the male, and the small size of the second gnathopoda makes its appear- 

 ance considerably different from that of the male. 



The last pair of pleopoda are thus described by Mr. Haswell : — " posterior 

 pleopoda with the outer ramus broad, lanceolate, armed on the borders with 

 a few setas, and terminating in two short strong setae." The portion which 

 he describes as the outer ramus is however really the peduncle, which is 

 elongated, as frequently happens in species of Podocerus ; and the " two 

 short strong setaa " are really the two rami, which are quite small, as in 

 several species of Podocerus. As described below one of them ends in three 

 or more teeth ; probably Mr. Haswell did not use a sufficiently high power 

 to observe this. There can therefore, I think, be no doubt that the 

 species really belongs to Podocerus ; it comes very close to P. cylindricus, 

 Say, but differs in points specified below sufficiently to warrant its being 

 placed in a separate species for the present at any rate. 



In the Transactions of the New Zealand Institute, vol. xi., p. 402, 

 Mr. Kirk has referred three specimens found at Worser Bay to Podocerus 

 cylindricus, Say ; this identification was however subsequently questioned 

 by Mr. Miers.* 



Ann. and Mag.N.H., series v., vol. v. (1880), p. 125. 



