PEOM SINGAPORE AND NEW ZEALAND. 201 



on the front margin ; fourth joint short, straight, with four bristles much longer than 

 itself on the hinder margin, and one on the lower front angle ; hand longer than wrist, 

 curved ; finger longer than wrist, shorter than hand, with an outlet near its apex for the 

 secretion from the gland-cells conspicuous in the first and third joints. 



Second peraeopods: side-plates of much greater extent from before backwards than 

 the preceding plates, excavated behind, and with the lower margin curiously sinuate, 

 this margin carrying plumose hairs, and serrate all along, except on the hinder lobe. 

 The joints of the leg very like those of the first peraeopods, but the long bristles very 

 plumose, the first joint, the fifth, and the sixth rather longer. The hand has three 

 groups of bristles on the hinder concave margin, near its juncture with the wrist. The 

 marsupial plate shows the marks of insertion of three terminal bristles, which have 

 probably been broken ofi" from the specimen. 



Third perseopods: side-plate extended from before backwards, anterior lobe the 

 larger ; first joint with front rim serrate, closely set with bristles, very convex, a little 

 out-drawn below ; the upper half of the hinder rim convex, the lower half being the 

 continuation of a separate fold of the outer surface, which narrows distally ; third joint 

 longer than second ; fourth longer than second and third together, fifth rather longer 

 than third ; finger very small, triangular, up-turned. Besides the series of bristles on 

 the anterior margin, the fourth and fifth joints terminate behind, as so usually in the 

 Ampeliscaidse, with fringes of spines varying extremely in length, especially on the 

 wrist, and variously serrate. Along the surface of the wrist are groups of small spines, 

 and a series of single ones on the hand ; the branchiae and marsupial plates as in the 

 preceding pair. 



Fourth perseopods : side-plates small ; legs very like the third pair, but first joint 

 pear-shaped, with both margins sinuous ; fourth and fifth joints rather longer than in 

 the preceding pair ; branchise like the rest. 



Fifth peraeopods: side-plate a somewhat oval lobe; first joint widening distally, 

 produced far below the third joint, anterior and lower margin of the produced part 

 fringed wdth long plumose bristles ; short bristles on the inner surface ; second joint 

 very short ; third joint with seven long spine-like bristles on anterior margin, a long 

 fine bristle and some short spines near lower hinder angle ; fourth joint much longer 

 than third, twelve spine-like bristles along serrate anterior margin; on the surface 

 series of single spines and groups, a fringe of them at the distal end varying in size, 

 but with none immensely elongated as in the two preceding pairs of perseopods ; fifth 

 joint about as long as third, narrow at junction with the fourth, anterior rim convex, 

 smooth ; groups of spines on surface and distally ; finger linear, straight, not half the 

 length of the hand, tipped with two fine bristles, one of them as long as the hand 

 itself. 



Pleopods with 22 joints to the rami. 



First uropods : peduncle lobed above ; four spines on the inner upper margin, the 



2g2 



