REPORT ON THE AMPHIPODA. 1267 



margin is ciliated ; on the outer surface of the plate towards the base there is a row of 

 unequal slender spines ; the first joint of the bulky palp is broad, and a little longer than 

 broad; the second is not once and a half as long as the first, broad, the inner margin 

 fringed with slender spines, many of which are very long ; the third joint much narrower 

 than the second, but as long, with fringes of long spines on either side the inner margin 

 and at the apex ; the fourth joint rather longer than the first, its inner margin finely 

 pectinate, its nail short but extremely sharp. 



The first pair of marsupial plates in the female have long setse on the free margin ; 

 the second pair (as seen in the smaller specimen) have setae also, but these are not 

 long. 



Fourth Perasop>ods a little longer than the third. 



Fifth Peraiopods much longer than the fourth, the increase of length applying to all 

 the joints, but in a marked manner to the third and fourth, which in the preceding 

 pairs are very short, although in both the third joint is longer than the first. In all 

 three pairs the hind margin of the first joint is produced downwards in a small point ; 

 in all three, as Mayer has observed and as Czerniavski's figures show, the hand is 

 devoid of the clasping-spines (Einschlagdorne) so usual in the Caprellidse ; the third 

 pair have some tolerably stout spines a little above the centre of the front margin, and 

 all the pairs have such near its distal end, but all these spines have flexible termina- 

 tions. The fingers have the inner margin minutely serrulate, and carry some cilia on 

 both margins. 



TJie Uropods appear to be one-jointed, not reaching beyond the trunk of the 

 pleon. 



Length of the male specimen, from the front of the head to the end of the pleon, in the 

 position figured, three-tenths of an inch ; of one of the female specimens, a little over a 

 cpuarter of an inch, of the other about a fifth of an inch ; the latter one has eggs in the 

 pouch. 



Locality. — Bermudas. 



Remarks. — The name Caprella inermis was preoccupied, so that should this species 

 by any chance prove to be distinct from Czerniavski's, it would fall to Mr. Haswell to 

 select another name for it. 



