238 G. M. Giles — Notes on the Amphipoda of Indian Waters. [No. 3, 



ture of silken secretion with fine sandy particles ; this inner tube being 

 quite distinct and coherent when separated from the shell by dissolving 

 the latter in dilute hydrochloric acid. 



Though quite lively, it was evident that the animal must be quite 

 confined to the bottom, as it was evidently incapable of lifting its heavy 

 house, but crawled about the bottom of the jar by means of its powerful 

 antennae. Of the two specimens, one was a female, and it is notice- 

 able that the eggs she carried were enclosed in no proper egg-pouch, 

 but were retained under the thorax only by narrow plates fringed with 

 long hairs, which, though of equal morphological value, differ markedly 

 from the nsual broad plates. 



So far as I am aware, the circumstance of an amphipod making use 

 ef a deserted shell as a tube has not been previously observed, and I 

 have based the proposed generic name on this circumstance. 



Animal long and slender, with the abdomen composed of six 

 distinct but very small segments ; antennule moderately large, flagel- 

 late, but without appendage ; antennae very large and pediform inser- 

 ted barely behind the antennules ; 3rd thoracic appendage with a well- 

 developed subchela considerably larger than the weakly subchelas of 

 2nd thoracic appendage ; 7th and 8th thoracic appendages short, with 

 the carpopodital articulation peculiarly modified, the joint being placed 

 obliquely on the anterior and outer face of the articulus, and the distal 

 end of the carpopodite rounded, and covered with short closely set 

 recurved booklets ; 8th thoracic appendage ambulatory ; 4tli abdominal 

 appendage biramous, 6th blunt, rounded, without rami, nearly hidden 

 beneath the squamous telson. 



5. CONCHOLESTES DENTALII, n. Sp., PI. VII, FigS. 7 — 11. 



The head, seen laterally, forms a truncated pyramid with the base 

 forwards, the small eye being situated on a small angular process be- 

 tween the antennule and antenna, but no marked recess is formed for 

 the reception of the latter appendage. The carapace projects forwards 

 a little in the middle line between the antennae in the form of two pro- 

 cesses, forming a sort of bifid rostrum. 



The thorax is very large, being a little more than twice as long as 

 the combined head and abdomen. The length of the segments is 

 somewhat irregular, the first being the shortest, the 2nd, 5th, and 

 6th subequal and longest, and the remaining segments of inter- 

 mediate length. The first segment has the additional peculiarity of 

 being prolonged into a sort of rostrum, armed with a tuft of hairs, 

 which overlaps the back of the head. The coxal plates arc small, 



