66 G. M. Giles — Descriptions of new Indian Amphipods. [No. 1, 



its appendage, which consists of about twelve joints, and almost exactly 

 equals the peduncle in length. 



The antenna is subequal to the antennule in length, and is quite 

 equally divided into peduncle and flagellum, the first of the five joints of 

 the former being hidden beneath the rostrum. 



The gnaihites are small and weak, the mandibles being quite 

 simple, and armed with a small cutting and a serrated masticatory 

 tubercle ; its appendage is two-jointed, and but feebly armed with hairs. 



The maxillae are proportionally somewhat stouter, and have their 

 rami armed with a number of very stout curved spines. 



The maxillipedes are of considerable size, and pediform. 



The gnatliopoda are small, not more than twice as long as the 

 depth 01 their corresponding coxse ; both are of similar form, subchelate, 

 with the palm oblique, and defined by a large triangular process, but 

 the hinder pair is somewhat the larger. 



The fourth and fifth thoracic appendages are of the usual ambu- 

 latory type, are subequal, and but little exceed the gnathopoda in length. 

 The sixth and seventh resemble each other in form, being stoutly built 

 and laterally armed with strong spines ; the seventh, however, is the 

 longer, equalling the entire thorax in length, while the sixth is but as 

 long as its first six segments. The eighth is the shortest of the thoracic 

 appendages, and is of peculiar form, its basipodite being expanded into 

 a broad oval plate which projects downwards behind the distal arti- 

 culation of the appendage, so as almost to reach the level of the point 

 of the dactylopodite. 



The first three abdominal appendages are rather small, but quite 

 of the usual type. Of the last three, the fifth is the shortest. It and 

 the fourth are armed with numerous stout, almost hooked spines ; their 

 rami are nearly equal. The sixth is peculiar in having its outer ramus 

 distinctly two- jointed, while the inner ramus is considerably shorter than 

 the first joint of the outer ; both rami are armed with a brush of stout 

 hairs. 



Although I carefully dissected the head of one specimen, I could 

 make out no trace of eyes. 



Ampelisca daleti, n. sp., PI. II, Fig. 3. 



A single specimen of this species was dredged in 7 fathoms, ofE the 

 Seven Pagodas, on the Madras coast. Unfortunately the specimen was 

 accidentally destroyed, but not before I had made a drawing. 



It differs considerably from its congener previously obtained in 

 Indian waters (A. lepta from 107 fathoms) in being a larger and much 

 more robust form, in the minuteness of its superior antennas, and in 



