80 Transactions. — Zoology. 



the posterior border of the sixth segment of the pereion, excavated poste- 

 riorly for the shallow coxa3 of the third pereiopoda. Coxa3 of last two pairs 

 of pereiopoda very small. Antennae 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 III., fig. 1. 



Eyes large. All the mouth parts and nearly all the lower antennas 

 concealed by the coxae of the two pairs of gnathopoda and the first pair of 

 pereiopoda. Coxae of first pair of gnathopoda triangular about as deep as 

 its segment, extending anteriorly over the mouth parts, posterior edge 

 slightly curved. Coxae of second gnathopod and first pereiopod deeper than 

 their segments, rather narrow, slightly curved. Coxae 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. Coxae of last two pairs of pereiopoda rudimentary, hidden. 

 The coxae 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 antennae 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 antennae 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, setae 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 setae. Colour — brown. 



Length, about \ 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 coxae from Mr. Haswell's 

 species for which he made the genus ; it will most probably form the type 



