456 ^Ir. A. O. Walker on 



l-sYO thirds of tlie lengtli of the band, Avliich is about twice as 

 ]on^ as uiJe with parallel margins, setose ; palm rather 

 oblique, convex, crenulate, defined by a spine. Second 

 gnathopods as in Orchoviene humili's (Costa) \_= 0. Bate>\ 

 iSars]. Third permipods'. side-plates wider than the depth 

 in Iront, with the usual posterior lobe ; fir.st joint about half 

 as large as the side-plate, deeper than wide ; hind margin 

 convex, serrate, produced down to the middle of the third 

 joint ; this is much produced behind and downwards. The 

 Jifth ])era'opods have the first joint nearly twice as deep as 

 wide and longer than the rest of the joints, including the 

 dactghts, together, otherwise like the third pair : the dactyli 

 of all the pcrteopods are very short. 



The first iiropods are subequal in extent to the second, 

 exceeding the third : the peduncle is one fourth longer than 

 the subequal rami, all the parts very spinous on the upper 

 margins. Second j^air less spinous. Peduncle in the third 

 pair rather longer than the outer ramus : inner ramus not 

 nearl}' reaching the end of the first joint of the outer, its 

 inner margin minutely serrate. Telson entire, deeply con- 

 cave above, the end truncate with two setules : it extends 

 beyond the end of the inner rami of the third uropods. 



Tlie difference between the telson of this species and that 

 of the female 0. humilis is only one of degree, as the truncate 

 margin is slightly concave. 



Orchomenella chelipes, sp. u. 



W.Q. 28/2/02, 10 f. ; eight specimens : length of female 

 with ova 5 mm. . 



//eac? subequal to the first segment ; ocular lobe reaching 

 the end of the first joint of the lower antenna?. Eye large, 

 broadly oval, dark red. Bodg : first two segments subequal, 

 shorter than any of the remaining segments. Posterior angle 

 of the third pleon-segment a rounded right angle, hind 

 margin smooth, lower margin straight. First urus-segraent 

 as long as the remaining two, carinate. 



Ujiper antennce: fir.^t joint three times as long as the next 

 two united, naked. Flagellum 11-jointed, the first as long 

 as the next two; appendage 4-jointed, the first twice as long 

 as the second, which is subequal to the third, the fourth 

 minute. Lower antenyue slightly longer than the upper ; 

 flagellum 12-jointed, subequal to the peduncle. Mouth- 

 vrgans as in O. nana (Kr.); second joint of mandibular palp 

 twice as long as the first. 



First gnathopods : side-plates widened below, rounded in 



