1526 THE VOYAGE OF H.M.S. CHALLENGER. 



Telson lon°- and tongue-like, more than twice as long as broad, nearly as long as 

 the preceding composite segment and not much shorter than the third uropods, the 

 sides gently convex, the apex acute ; there are many little curved lines across this and 

 various other parts of the animal. 



Length. — From the front of the head to the end of the first segment of the pleon 

 about a quarter of an inch, the total length about two-fifths of an inch. 



Locality. — July 1875, between Japan and Honolulu ; lat. 35° N. ; surface. Six speci- 

 mens ; the specimen described, a male. 



Remark. — The specific name is given in compliment to Lord George Campbell, the 

 author of the very entertaining work, Log Letters from the Challenger. 



Parapronoe clausi, n. sp. (PL CXC). 



Head large, rounded ; the postero-lateral angles of the first three pleon-segments not 

 rounded but scarcely or not produced, the lower margin in the first interrupted, the 

 hinder part starting from the inner surface a bttle above the termination of the front 

 part ; the fourth segment considerably shorter than the following composite segment ; 

 the body spotted with numerous small orange spots. 



Upper Antennas nearly as in Parapronoe campbelli, but the rounded apex of the first 

 joint of the flagellum not at all produced, the small second almost as long as the much 

 narrower third joint, and carrying filaments at three points of the upper margin. 



Lower Antennas differing much from those of Parapronoe campbelli, and agreeing 

 with those of Parapronoe crustulum, Claus; the gland-cone projecting from the wall of 

 the head (see fig. g.c.) ; the third (first free) joint of the peduncle much longer than the 

 fourth, the fourth a little longer than the fifth ; the first joint of the flagellum not more 

 than a third of the length of the last joint of the peduncle, narrow at each end ; the 

 second joint very short and slender, the third still more minute ; all the joints fringed 

 with short filaments, except the third joint of the flagellum which is tipped with little 

 hairs or setules. 



Upper Lip semicircular. 



Mandibles. — The trunk long, nearly straight, but upward bent at the base and with 

 very sinuous lower margin ; the cutting edge forming part of the lower margin, very 

 broad, convex, strongly striated, and finely denticulate, with a blunt tooth at the upper 

 or front corner, in the roar of which there is a groove on the surface ending in a small 

 tubercle ; to the left mandible there is a long shallow secondary plate, similar to the 

 principal but without the upper tooth ; the palp has a large strongly bent first joint, 

 very much longer than the two following joints together ; the second rather longer 

 than the third. The breadth of the cutting edge much exceeds the length of the third 

 joint of the palp. 



