1888.] G. ]\[. Giles— iVofes on tlie Amphipoda of Indian Waters. 237 



nated by a brush of hairs so dense as to hide their dactylopodites, which, 

 if present, must be very small. The sixth and seventh are stout, and alike 

 in general form, having their meropodites considerably expanded. They 

 are articulated quite to the edge of the coxae and their basipodites, 

 though strong, are without buttress plates. The seventh is considerably 

 the longer, the sixth being only as Jong as the head and the first four 

 thoracic segments, while the seventh is as long as the head and thorax 

 save its last segment. The eighth is unfortunately partially wanting on 

 both sides in my one specimen, but is evidently much the largest and 

 longest of the appendages, the basi-, ischio-, and meropodites, which re- 

 main, being very considerably larger than those of any other appendage ; 

 the basipodite is strengthened by buttress-like plates both in front and 

 behind. 



The first three abdominal appendages are of the usual type, but are 

 exceptionally powerful. The last three are rather long and thin, the 

 fourth being longest, and the sixth the shortest, the fifth, however, pro- 

 jecting rather beyond the other two, when all three are extended. They 

 are almost without hairs or spines, such as are present being very fine 

 and short, and have their protopodites cylindrical and their rami, of 

 which each has a pair, of styloid form. 



Our species differs from M. carinatus in wanting the dorsal keels 

 and in both gnathopoda being of typical form ; from M. stimpsonii in 

 the much larger proportional size of the abdomen ; and from M. demissus 

 in the last two CoxfB being of fair size, certainly not very small, in the 

 eyes being black and not vermillion-coloured, and in the greater size of 

 the abdomen. 



CoNCHOLESTES, gen. nov. 



The following species is a most singular one in its habits. It belontys 

 certainly to the subfamily Co7'ophiides of the family Gorophiidce, but I can 

 find no genus, either in Spence Bate's Catalogue of the British Museum 

 Amphipoda, or amongst the numerous new genera that have been estab- 

 lished in the family since the date of that publication, that, by any mo- 

 derate extension, can be made to include so peculiar a sj^ecies, al- 

 though it certainly approaches most nearly to Gorophium. 



It was obtained by dredging in 7 fathoms, on a sandy bottom, off 

 the " Seven Pagodas," on the Madras Coast. Amongst the catch were a 

 number of specimens of Bentalium lacteum, some living, a few empty, 

 and more containing a small pagurus. On examining the latter, I was 

 surprised to find that two specimens were inhabited by a tubicolous 

 amphipod which had made its home in the shell, lining it with a mix- 



