Chilton. — On New Zealand Sessile-eyed Crustacea. 251 



narrower than the last segment of pereion, sides fringed with setae, margins 

 entire ; terminal pleopoda longer than the pleon ; peduncle short, expand- 

 ing distally ; inner branch nearly twice as long as peduncle, rather broad, 

 narrow at base, margins serrated and supplied with tufts of long fine seta3 ; 

 outer branch similar but somewhat shorter. 



Colour, very light yellow, with numerous black dots scattered over body. 

 Length of body, about ^ inch. 



Hab. Lyttelton Harbour. A single specimen. 



Genus Stenetrium, Haswell. 

 (Proc. Linn. Soc. N.S.W., vol. v., p. 478.) 



As this genus is new to New Zealand, I , transcribe the generic 

 characters : — 



"Body dorso-ventrally compressed; abdomen short, 1-jointed. Head 

 with a short rostrum. Antennae inserted on the anterior margin of the 

 head ; internal pair very short, external pair very long ; both with well- 

 developed flagella. Mandibles provided with a palp. Maxillipedes ex- 

 panded, operculiform. First pair of thoracic limbs with a large prehensile 

 manus ; following pairs ambulatory. First pair of abdominal appendages 

 broad, operculiform. Caudal appendages biramous, inserted on the border 

 of the shield-like abdomen near the extremity." 



Stenetrium fraction, sp.nov. PI. xviii., fig. 3, a to/. 



Inner antennae reaching slightly beyond the end of third joint of outer 

 antennas ; first joint of the peduncle large, as broad as long ; second equal 

 in length to the first, but more slender ; third rather longer than the 

 second, both bearing long setae at their distal ends ; flagellum about half as 

 long again as the third joint of peduncle, consisting of about five joints, 

 first joint the longest, being as long as the three following. Outer antennae 

 as long as the body; first joint of peduncle short, produced acutely at its 

 extero-distal angle ; second also short ; third as long as the first and second 

 together, produced acutely at its intero-distal angle, bearing on the outer 

 edge an articulated appendage, which has the end rounded and supplied 

 with a few long setae ; fourth and fifth joints very long, fifth slightly longer 

 than the fourth, both with a few rather fine setae ; flagellum with the 

 joints very short, almost linear at the proximal end, increasing gradually in 

 length towards the distal end, the first few united into a single joint; fine 

 setae at intervals. First pair of gnathopoda with the meros and carpus 

 subequal and supplied with numerous fine setae ; propodos large, ex- 

 panding distally, both margins fringed with fine setae, palm transverse, 

 defined by a stout tooth, and armed with strong serrated setae. Dactylos 

 thick and strong, inner edge thickly fringed with strong denticulated setae. 

 Lateral margins of the abdomen irregularly serrate and with a few long 



