Chilton. — On Neiv Zealand Sessile-eyed Crustacea. 249 



Aet. XIV. — Additions to the Sessile-eyed Crustacea of New Zealand. 



By Chables Chilton, M.A. 



[Bead before the Philosophical Institute of Canterbury, 15th November, 1883.] 



Plates XVII.-XXI. 



This paper is the result of the work I have been able to do on the subject 



during the year. The species are not arranged in any particular order, but 



are given as I found most convenient when working them out. 



I desire to take this opportunity of thanking Mr. E. M. Laing, of Can- 

 terbury College, for having on many occasions brought me seaweed from 

 Lyttelton harbour. From this I have taken many specimens which I 

 should not otherwise have been able to obtain. 



ISOPODA. 

 Genus Apseudes, Leach. 

 (Bate's and Westwood's " British Sessile-eyed Crustacea," vol. ii., p. 144.) 

 Apseudes latus, sp.nov. PL xvii., fig. 1, a to h. 



Body broad, vertically compressed ; pereion of same width throughout 

 its whole length ; pleon narrowing considerably posteriority ; sides of seg- 

 ments of pereion and pleon fringed with long sparsely plumose hairs. 

 Head produced into a bluntly ended triangle between the antennae. Upper 

 antenna with the first joint of peduncle rather short, stout, especially at the 

 centre where the width is about half the length, long hairs on outer edge and 

 at inner distal angle; second joint not quite one-third the length of the first, 

 fringed with hairs on both sides; third smaller ; secondary nagellum rather 

 more than half the length of the primary, which is slightly longer than the first 

 joint of peduncle. Lower antenna small, about as long as peduncle of upper ; 

 of the joints that are visible the first two are short and stout, second bear- 

 ing a small oval plate with four or five long hairs. First pair of gnathopoda 

 small ; carpus more than twice as long as broad ; propodos stouter than 

 carpus, produced into a stout fixed finger, which narrows abruptly to a 

 sharp point, has the inner edge minutely crenulated, and is supplied towards 

 the extremity with several setse ; dactylos with a stout tooth on the inner 

 edge near the base, ending very acutely, supplied with short setae on inner 

 edge, and a few longer ones on the side. Second pair of legs with the 

 carpus nearly quadrangular with two stout spines on posterior margin ; 

 propodos not expanded, longer than carpus but more slender, three or four 

 stout spines on posterior margin, one slender one, nearly as long as the 

 dactylos, at the end. Third and fourth pairs of legs similar to the second. 

 Fifth having the ischios and meros both short and supplied with long setee ; 

 carpus about as long as the propodos ; a spine at its antero-distal angle ; 

 propodos expanded distally, extremity rounded and thickly fringed with 



