AMPHIPODA. 293 



quite straight, while the inner is parallel to the outer for half its length, and thence 

 tapers to a very sharp point, with a tuft of setse <>n the outer margin ; the t list al half 

 of the proper hind margin of the wrist is quite straight. The hand is narrow and 

 curved, the margins parallel trillion/ any prominence on the inner. Dactylus fully as 

 long as the hand (fig. is. gn. 2 S). 



First and 2nd perseopods as in E. abditus. 



Third peraeopods : in the male the 1st joint has the hind margin produced down- 

 wards in a narrow rounded (not " acute," as described by Dana, though figured 

 rounded) lobe reaching beyond the end of the 2nd joint ; the 3rd joint is longer than 

 the next 3, curved and expanded at the end (fig. 48. pp. 3 c?). In the female the 1st 

 joint is without the lobe, and the 3rd joint is straight and shorter than the next two. 



The 4th pair are slender and much longer than the 3rd, the 3rd and 5th joints 

 subequal. 



The 5th pair are longer than the 4th and extend considerably beyond the uropods ; 

 the Mil joint is as long as the 3rd and Atli together. 



First uropods : peduncle considerably longer than the rami, the inner margin with 

 5 or 6 spines, rounded off and pectinate or finely serrate at the end ; inner ramus a 

 little shorter than the outer, both spinous and minutely pectinate. 



Second uropods like the 1st, except the inner margin of the peduncle, which is not 

 rounded or pectinate on the inner margin. 



Third uropods as in E. abditus two unequal spines near the middle of the outer 

 margin and a small one near the base of the peduncle. 



Telson as in E. difformis, with an obtuse central tooth. 



Length 5 millims. 



The colour of the specimens (in spirit) was lighter than in E. abditus, with dull 

 red blotches and transverse bars on the body and limbs. This species may be 

 considered as the eastern form of E. difformis, from which the male differs in the 

 even hind margin of the hand, the somewhat differently formed wrist of the 2nd 

 gnathopods, and, still more, in the peculiar construction of the 3rd perreopods. The 

 female can only be distinguished from E. abditus by its greater slenderness generally, 

 and especially by the great length of the 5th joint of the last peraeopods. 



Cerapus, Say, 1817. 



Cerapus calamicola (( ! i lbs). 



Cyrtophium calamicola, Giles, 'Journ. Asiatic Soc. Bengal,' vol. liv., 1885, p. 54, pi. ii. <J . 



Cerapus flindersi, Stebbing, ' " Chall." Amph.,' p. IKJ.'j, plate cxxv. ?. 



Cerapus flindersi, Step,., Chilton, 'Eec. Aust. Mus.,' vol. ii., p. 1 (separate copy), pi. I. 3- 



Station LIIL, Periya I'aar Kerrai, many, with tubes. East Cheval Paar. 

 A female from Station LIIL measured 6 millims. ; those from Periya Paar Kerrai 

 only 3 millims. 



