REPORT ON THE AMPHIPODA. 999 



which has some small spines at the apex in front ; the third and fourth joints long, 

 equal in length ; the fifth joint broken, probably equalling either of the two preceding 

 in length ; all three with marginal spines. 



The Fifth Perieopods and all the Pleon missing. 



Length. — The half specimen, in the position figured, measured, from the rostrum to 

 the end of the peraeon, three-twentieths of an inch. 



Locality. — Station 145, off Marion Island, December 27, 1873; depth, 100 fathoms; 

 bottom, volcanic sand. 



Remarks. — The specific name is derived from the locality whence the specimen 

 was obtained. This species from the south is remarkably like the northern species 

 Pardalisca cuspldata; the mandibular palp is rather shorter, the spines on the outer 

 plate of the first maxilla more numerous, the setse on the inner plate of the second 

 maxillae less numerous, the maxillipeds broader, the first joint of the first gnathopods 

 broader, and the finger in both the first and second gnathopods broader. Boeck speaks 

 of the third joint in the first and second perasopods of Pardalisca cuspldata as very 

 short, which would by no means agree with the present species, but in a specimen from 

 Kvaenangen, kindly sent me by Konservator J. Sparre Schneider, I find that the joint in 

 question agrees well with that above described for the present sjitecies. 



Genus Synopioides, n. gen. 



Mandibles each with a secondary plate ; the palp greatly elongate, the third joint 

 linear. 



Maxillipeds with long four-jointed palp. 



The Gnathopods not subchelate, the hands tapering ; in the first pair the hand longer 

 than the wrist. 



The Third (Fourth ?) and Fifth Perseopods very elongate. 



The Uropods with the rami of the first and third pairs equal or nearly so ; in the 

 second pair the outer ramus much shorter than the inner. 



The Telson reaching beyond the peduncles of the third uropods, deeply cleft. 



Fifth and sixth pairs of side-plates broader than the preceding pairs ; none of the 

 side-plates deep. 



By the head and antennae this genus recalls Synopia, Dana, whence the generic name, 

 but in the hinder peraeopods, in the third uropods and telson, it is suggestive of Nicippe, 

 Bruzelius, and it seems to find a suitable place near, if not in, the family Pardaliscidae. 

 The inclusion of the genus in that family cannot, however, be accomplished without 

 altering the character assigned to the mandibles, according to which one of them is 

 devoid of a secondary plate. 



