Page:Transactions NZ Institute Volume 15.djvu/114

chiefly on the proximal half; on the outer margin mostly towards the distal part are also a few small tufts of setæ, but these lie close along the joint and are very easily overlooked. Palm transverse defined by a short stout tooth and having short stout setæ along the whole palm. Dactylos thick and strong, not longer than palm. First two pairs of pereiopoda subequal, rather slender, last three broad, increasing slightly in size posteriorly, basos moderately large subrectangular, anterior edge with a few small setæ, posterior edge minutely serrate, a very minute seta arising at each serration, meros broad serrated, with moderately long strong setæ, carpus expanding somewhat distally, setose; propodos setose on anterior side only, numerous strong setæ arising at the base of the dactylos; dactylos considerably narrower than propodos, ending in two sharp points, the principal one longer and more curved than the other. Inferior edges of first three segments of pleon supplied with several small setæ. Posterior pair of pleopoda only reaching very slightly beyond the two preceding pairs, of which the first pair is slender, having the peduncle considerably longer than the rami, rami with long strong setæ at their extremities; second pair stouter, rami with similar long strong setæ at end; third pair having the rami broad and setose more especially on the outer edge. Telson double, each half concave posteriorly with two long setæ arising from the hollow, and having another hollow on the outer side towards the distal end with a single seta springing from the hollow.

Length, about ⅕ of an inch.

Hab. Lyttelton Harbour.

This species is very close to M. quadrimanus, Dana, M. grossimanus, Montagu, M. viridis, Haswell, M. truncatipes, Spinola, but differs from all in the form of the second pair of gnathopoda. In this respect it closely resembles M. blanchardi, Spence Bate, but differs in having the basa of the three posterior pairs of pereiopoda dilated, in having the secondary appendage of upper antenna not so long as the primary flagellum, and in other points. It also resembles M. tenella, Dana, but that species has the base joint of upper antenna "not stout, second very long;" the two species also appear to differ somewhat in the form of the second gnathopoda, and also in the length of the posterior pair of pleopoda.

"Eyes small, situated on a lobe between the superior and inferior antennæ. Superior antennæ having a secondary appendage, which is generally very minute. Inferior antennæ robust, the flagellum consisting of but few articuli and as stout as the peduncle, the hairs towards the extremity being developed into spines, which increase in strength as they