Species of the Amphipodan Genus Cyproldia. 245 



at regular intervals; dactylos lono-, more than half as long as 

 the propodos, a few fine seta3 on both margins, the terminal 

 claw long and ending very acutely. 



The second gnathopod very similar to the first, but rather 

 stouter; tiie meros bears four or five set^e on its truncate 

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

 podos and its distal process reaches halfway along the propodos, 

 and, in addition to the seta3 on its lower margin and extremity, 

 has an irregular row of smaller seta3 along the margin that is 

 in contact with the propodos ; palm of propodos not well 

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

 setse at their bases ; ilactylos as in first gnathopod, but 

 slightly shorter. 



The side- plates of {\\t first and second per eiopoda have been 

 already described ; the basa are narrow and the remaining 

 paits of these appendages call for no special notice. 



In the third pereiopod 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 transparent, its 

 margin slightly concave posteriorly, the postero-distal corner 

 rounded; the meros is produced distally and posteriorly into 

 a process which reaches as far as the end of the carpus and 

 ends acutely. 



Hhe fourth aud fifth pereiopoda are 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 pereiopoda, not acutely pointed as in 

 ? Cyproidia hrevirosfris, Scott. 



In the pIeo7i the first three segments are subequal in length, 

 their pleural projections not greatly developed, the infero- 

 posterior 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 uropods 

 are slender, subequal, with slender subequal rami. The 

 peduncle of the third uropods is stout, its upper distal angle 

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

 the peduncle. The telson 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 once 



