250 Transactions. — Zoology. 



pectinated setts, bearing also one spine above three-fourths as long as the 

 dactylos. Sixth pair of legs with the ineros longer than the ischios, nearly 

 as long as the carpus, both bearing long setae ; propodos narrower than 

 carpus, bearing at the extremity the dactylos and a spine about three-fourths 

 as long as the dactylos, and on distal half of the posterior margin a row of 

 about six or seven short stout setae. Seventh pair similar in form to the 

 sixth ; meros rather longer than carpus, both thickly fringed on each side 

 with long plumose hairs, propodos having the end and greater part of the 

 posterior margin bordered with stout straight setae. First five segments of 

 pleon subequal in length, sixth not quite so long as the two preceding, last 

 segment triangular, rounded posteriorly, and bearing three or four long 

 setae. Last pair pleopoda long, peduncle stout, reaching as far as the end 

 of last segment of pleon, outer edge bearing long hairs ; outer branch short, 

 of three joints ; inner branch nearly five times as long as the outer, having 

 about thirteen joints rather irregular hi size ; both branches bearing numer- 

 ous long setae. 



Colour, greyish. Length, about •§• inch. 



Hab. Lyttelton Harbour. A single specimen found creeping in mud at 

 the root of some seaweed. 



Genus Janira, Leach. 

 (Bate's and Westwood's " British Sessile-eyed Crustacea," vol. ii., p. 335.) 



As this genus is new to New Zealand, I give here the generic characters. 



" Pereion serrated along the lateral margins ; pleon having all the seg- 

 ments coalesced into a single plate ; covered in the female, beneath with a 

 large flat membranous plate concealing the branchial feet ; and furnished 

 at the tip with a pair of elongated bifid uropoda. Outer antennae as long 

 as the animal. Dactyla biunguiculate." 



Janira longicauda, sp. nov. PI. xviii., fig. 2, a to b. 



Eyes large. Head rectangular, rather more than twice as broad as 

 long, produced into a rostrum rounded at the end reaching nearly to the 

 end of the second joint of the peduncle of inner antennae. Inner antennae 

 reaching nearly as far as the end of the fourth joint of peduncle of outer 

 antennae ; first joint stout, second about half as long, and with three or four 

 stout setae at distal end ; third about as long as second but more slender ; 

 flagellum slightly longer than peduncle, setae few and delicate. Outer 

 antennae as long as body ; first three joints of peduncle short, the second 

 bearing on its outer edge a small articulated plate, tipped with a few stout 

 setae ; fourth joint longer than the three basal joints together, a few setae 

 on each side ; fifth slightly longer than the fourth, narrowed at the base. 

 Segments of pereion with lateral margins indented and fringed with stout 

 setae. Body of about equal width throughout. Pleon nearly circular, much 



