Species of the Amphipodan Genus (Jyproidia. 245 



at regular intervals ; dactylos long, more tliaii half as long as 

 tlie j)ro|)0(l(is, a I'l'w fine sctje on l)otli margins, the tcrniinal 

 claw lung and ending very acutely. 



'i'lie second (jnatliopod very similar to the first, but rather 

 stouter; the nieros bears four or five sette on its truncate 

 distal margin ; the carpus is slightly longer than the pro- 

 podosand its distal j)roeess reaches halfway along the |)ropodos, 

 atul, in addition to the seta? on its lower margin and extremity, 

 lias an iiregular row of smaller s(ta> along the margin that is 

 in contact with the propodos ; palm of propodos not well 

 defined, convex, bearing six stout plumose setie, with shorter 

 seta? at their bases ; dactylos as in first gnathopod, but 

 slightly shorter. 



'J'he side-plates of the ^/?V.s< and second pereiopoda have been 

 already described ; the basa are narrow and the remaining 

 parts of these appendages call for no special notice. 



In the third jiereiopod the side-plate is of moderate size, its 

 margin smooth and convex; the basos is produced poste- 

 riorly into a thin flat plate, very delicate and transj)arent, its 

 margin slightly concave posteriorly, the ])ostero-distal corner 

 rounded; the meros is produced distally and |)Osteriorly into 

 a process which reaches as far as the end of the carj)ns and 

 ends acutely. 



'Y\\Q fourth ^\\i\ ffth pereiopoda arc similar to the third, but 

 the side-plates are smaller, while the expansions of the basa 

 are broader and less delicate ; the postero-distal angles are 

 rounded as in the third jicreiopoda, not acutely pointed as in 

 ? Cyproidia hrevirostrisj Scott. 



In the pleon tiie first three segments are subequal in length, 

 their jdeural projections not greatly developed, the infero- 

 postcrior angles rounded and not produced backward. The 

 appearance of the terminal portion of the pleon, with its long 

 dorsally crested fourth joint, followed by the very short fifth 

 joint, is very characteristic. The first two pairs of iiropods 

 are slender, subequal, with slender subequal rami. The 

 peduncle of the third uropods is stout, its upju'r distal angle 

 acute ; rami unequal, the outer shorter one being as long as 

 the ])eduncle. The tidson does not appear to be laterally 

 compressed, but is somewhat boat-shaped, concave above, and 

 reaches as far as the end of the peduncle of the third uropods. 

 The first uropods appear to reach a little beyond the extre- 

 mity of the second, and these a little beyond that of the 

 third ; but in this, as in so many other characters, there is 

 evidently considerable variation. 



While this species closely resembles the other species 

 referred to the genus in most respects', it can be at onco 



