REPORT ON THE AMPHIPODA. 1201 



distally, with five spiucs on the outer margin and one or two on the inner ; the outer 

 ramus with five spines on the outer margin, one or two on the inner, and an apical 

 group, including one spine much larger than the others ; the inner ramus broader and 

 very much longer than the outer, with seven spines on each margin, not in pairs, and an 

 apical group of five including one long one ; the terminal uropods consist of a pair of 

 narrow oval plates, which reach beyond the telson when extended, but not nearly to the 

 end of the peduncles of the first pair ; when directed, in what seems to be their natural 

 position, so that their apices touch, they are almost completely covered by the telson ; on 

 the inner side there seems to be a slight constriction before the apex is reached, and a 

 little way above this a small spinule finds its place. 



The Telson seems to be almost circular, with a very thin distal edge. 



Length. — The specimen, in the position figured, measured, from the front of the head 

 to the extremity of the uropods, just upon a quarter of an inch. 



Locality. — The single specimen, no doubt a male, was mounted in Canada balsam 

 during the voyage, and labelled "Caprella purus, on Brissops lyrif. 18 Dec. 73." The 

 date corresponds with Station 142, lat. 35° 4' S., long. 18° 37' E. 



Remarks. — The specific name adopted is that which was found on the label, and which 

 perhaps referred to the transparency of the specimen. 



The species evidently bears a strong resemblance to Laetmatophilus tuberculatus, 

 Bruzelius, but in that species the upper and lower antennae are described and figured as 

 nearly equal, and the hand of the first gnathopods is said to be shorter but broader than 

 the wrist, statements which do not suit the present species, in which moreover the 

 peraeopods and branchiae differ from those figured for the other species. 



Family I c I L I D M, Dana, 1849. 



In 1849 Dana established the Icilidae as fourth family of the subtribe Gammaracea, 

 placing in it the genera leilius, Dana, and Pterygocera, Latreille ; in 1852, in the 

 preliminary account of his own collections, he upholds the family with the genus leilius 

 containing the single species Leilius ovalis. For his definition of the family, see Note on 

 Dana, 1852 (p. 255). In the same year Dana relinquished the family and made the 

 Icilinae the third subfamily of the family Corophidae, with the genera Leilius and 

 Pterygocera, leilius ovalis being now named Leilius ellipticus. For his definition of 

 the group as a subfamily, see Note on Dana, 1852 (p. 257). After a long interval of 

 neglect the title was revived in 1S86 by Gerstaecker, who in his "Divisio II., 

 Gammarina," " Tribus I. Corophiina," places "Fam. 4. Icilinae, Dana," containing the 

 genera " Leilius Dana," " Lcridium Grube [Pereionotus Sp. Bate)," " Phlias Guer." 



(ZOOL. CHALL. EXP. — PART LXVII. 1888.) Xxx 151 



