Page:Transactions NZ Institute Volume 15.djvu/108
the posterior border of the sixth segment of the pereion, excavated posteriorly for the shallow coxæ of the third pereiopoda. Coxæ of last two pairs of pereiopoda very small. Antennæ subequal superior without an appendage. 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 antennaæ concealed by the coxæ of the two pairs of gnathopoda and the first pair of pereiopoda. Coxæ of first pair of gnathopoda triangular about as deep as its segment, extending anteriorly over the mouth parts, posterior edge slightly curved. Coxæ of second gnathopod and first pereiopod deeper than their segments, rather narrow, slightly curved. Coxæ of second pair of pereiopoda enormously developed, much deeper than its segment and extending posteriorly as far as the posterior border of the seventh segment of pereion, excavated above, posteriorly for the shallow coxa of the third pereiopod. Coxæ of last two pairs of pereiopoda rudimentary, hidden. The coxæ 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 antennæ 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 antennæ 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, setæ 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 setæ. Colour—brown.
Length, about 1⁄7 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 coxæ from Mr. Haswell's species for which he made the genus; it will most probably form the type