248 G. M. Giles— Nofee on the Amphipoda of Indian Waters. [No. 3, 



A series of transverse sections shewed the stomach to be very simple 

 and scarcely at all armed. It was also evident that the diet of the 

 animal consists mainly of minute marine algee and diatoms. The pecu- 

 liar fin-like form assumed by the sixth abdominal appendage no doubt 

 subserves the almost purely surface existence which the creature appears 

 to lead. 



9. CEdicerus puliciformis, n. sp., PI. YII, Figs. 5 & 6,$. 

 Although not in all points agreeing with the definition of CEdicerus 

 as restricted in Spence Bate's Catalogue, the present species corresponds 

 sufficently well to the genus as extended by Kossmann (Zool. Reis. ii, 

 p. 130, 1880), who combines under Oedicerus the genera Kroyera, Monocu- 

 lodes, and Westwoodilla, as well as Dana's original CEdicerus. 



Our species resembles most nearly QlJ. cequima7ius, Kossmann, 

 from the Red Sea {loc. cit.). From this, however, it differs in the pro- 

 portions of the body, the thorax in Kossmann's species being relatively 

 much larger, exceeding considerably in length the first three segments 

 of the abdomen, while the reverse is the case in the species to be pre- 

 sently described. 



Female specimen, carrying ova, dredged in Megna shoals, 5 fathoms. 

 Length, about 2 mm. Colour, dirty white. 



Head quadrate produced into a somewhat acute rostrum, which is 

 fringed below with fine hairs ; excluding the rostrum, it is as long as 

 the first three thoracic segments. Eyes placed laterally, very small, so 

 that they might well be overlooked. 



ThoraoG small, forming less than a third of entire body length, the 

 segments of about uniform depth, but increasing regularly in length 

 from before backwards. Coxal plates small, of almost uniform depth. 



Abdomen large ; the first three segments alone considerably ex- 

 ceeding the thorax in length ; fourth segment narrowed in front so as 

 to move freely beneath the much excavated joosterior part of the third : 

 fifth and sixth segments very small. Telson squamiform, entire. 



All the appendages are remarkable for their extreme hirsuteness, 

 their distal parts especially being so thickly clothed with long fine hairs 

 that their outline is very difiicult to trace. 



Antennules short, equalling thefiist five thoracic segments in length ; 

 the peduncle forms rather more than a third of their entire length. 



Antenna} long, peduncle consisting of three short basal, and two 

 longer distal, joints ; flagellum slender, multiarticulate, not very hirsute ; 

 the entire organ nearly as long as the thorax and abdomen together. 



Maxillipedes large and pediform. The second of the thoracic ap 

 pendayeSj as long as the thorax, slender, weakly subchelate, the palm 



