CaiLton.—On New Zealand Sessile-eyed Crustacea. 251 
narrower than the last segment of pereion, sides fringed with sete, 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 sete ; 
outer branch similar but somewhat shorter. 
Colour, very light yellow, with numerous black dots scattered over body. 
Length of body, about 4 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, 1 transcribe the generic 
characters :— 
* Body dorso-ventrally compressed ; abdomen short, 1-jointed. Head 
with a short rostrum. Antenne 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 ‘preheusile 
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 fractum, sp. nov. Pl. xviii., fig. 3, a to f. 
Inner antenne reaching slightly beyond the end of third joint of outer 
antenne ; 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 sete 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 antenne 
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 sete; fourth and fifth joints very long, fifth slightly longer 
than the fourth, both with a few rather fine sete; 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 
sete at intervals. First pair of gnathopoda with the meros and carpus 
subequal and supplied with numerous fine sete; propodos large, ex- 
panding distally,. both margins fringed with fine sete, palm transverse, 
defined by a stout tooth, and armed with strong serrated sete. Dactylos 
thick and strong, inner edge thickly fringed with strong denticulated sete. 
Lateral margins of the abdomen irregularly serrate and with a few long 
