80 Transactions.— Zoology. 
the posterior border of the sixth segment of the pereion, excavated poste- 
riorly for the shallow coxe of the third pereiopoda. Coxe of last two pairs 
of pereiopoda very small. Antenne subequal superior without an appen- 
dage. Mandibles with a palp. Maxillipedes unguiculate; both basos and 
ischium armed with small squamiform plates. Gnathopoda subcheliform. 
Pereiopoda slender. Posterior pleopoda biramous.  Telson single.” 
Cyproidia (?) crassa, sp. nov. Pl. IIL, fig. 1. 
Eyes large. All the mouth parts and nearly all the lower antenne 
concealed by the coxe of the two pairs of gnathopoda and the first pair of 
pereiopoda. Coxe of first pair of gnathopoda triangular about as deep as 
its segment, extending anteriorly over the mouth parts, posterior edge 
slightly curved. Coxe of second gnathopod and first pereiopod deeper than 
their segments, rather narrow, slightly curved. Coxe of second pair of 
pereiopoda enormously developed, much deeper than its segment and ex- 
tending posteriorly as far as the posterior border of the seventh segment 
of pereion, excavated above, posteriorly for the shallow coxa of the third 
pereiopod. Coxe of last two pairs of pereiopoda rudimentary, hidden. 
The coxe of the two gnathopoda and the first two pereiopoda united 
together to form deep broad lateral shields which enclose all but the ends 
of the pereiopoda. Upper antenns with first two joints of peduncle stout, 
subequal, the second produced above into a strong tooth, third joint small 
and indistinguishable from the flagellum; flagellum nearly as long as 
. peduncle bearing on its under surface long auditory cilia. First joint of 
peduncle of lower antenne large, second joint shorter, articulated to the 
first by a geniculate joint, third joint longer than second but not quite so 
long as the first followed by a short flagellum about as long as the third 
joint of peduncle. Two pairs of gnathopoda equal in size and similar in 
shape, meros and carpus both having the inner distal angle produced into a 
lobe setose at the end, propodos rather small, hairy, some of the hairs on 
the palm strong, plumose at tip, dactylos rather small, slightly curved at 
the tip; the gnathopod appears to be but very imperfectly subchelate. 
Pereiopoda subequal, sete few, short. Of the last three pairs of pleopoda 
the first is the longest, peduncle rather slender, rami slender, lanceolate, 
nearly equal, almost naked, second similar but with rami more unequal, 
last stouter, rami unequal, naked. Telson oval, slightly narrower towards 
the end than at base, margins entire, no sete. Colour—brown. 
Length, about 4 inch. 
Hab. Lyttelton harbour. 
As will be seen from the figure and the description already given, this 
species differs very considerably in the form of the coxw from Mr. Haswell’s 
species for which he made the genus ; it will most probably form the type 
Ld 
