42 CEYLON PEARL OYSTER REPORT. 



broader than long, with the male appendix a little longer than the breadth of the 

 ramus, transparent, smooth, of uniform width, with the apex turned a little away 

 from the ramus. The outer ramus has the serration of its distal outer margin 

 produced into prominent teeth. The third pleopods have the portion of the outer 

 ramus beyond the suture nearly as long as it is broad. The fourth and fifth pairs 

 have branchial folds on both rami. 



The uropods are very hairy. The short peduncle is produced into a quadrate 

 process representing the inner ramus, which has its lower angle a little acutely 

 produced and beset with short feathered setae. The movable ramus is long, 

 cylindrical, slightly curved, the outer margin being convex. 



Length 5 millims., breadth 2 '5 millims. 



Locality : Cheval Paar ; Muttuvaratu Paar. 



Cilicsa (?), sp. juv. Plate IX. (C). 



The small specimen figured is no doubt immature, as may be judged from the 

 unfurnished condition of the maxillipeds. The pleon differs little from that of the 

 female or young C. whiteleggei, except that the outer ramus of the uropods shows no 

 outward curving. The first antennae have a massive peduncle and a flagellum of 

 eight joints or, perhaps, more. The flagellum of the second antennas is twelve- 

 jointed. In the finger of the gnathopods the little spine or tooth at the base of the 

 nail is comparatively strong. 



Length, in a somewhat bent position, about 5 - 5 millims. 



Locality : Palk Bay. 



Cymodoce, Leach. 



1814, Cymodoce, Leach, ' Edinburgh Encycl.,' vol. 7, p. 433. 



1902, Cymodoce, Stebbing, ' South African Crustacea,' part 2, p. 73. 



1904, Cymodoce, Stebbing, in Gardiner's 'Fauna, Maldive and Laccadive Archip.,' vol. 2, pt. 3, p. 712. 



Cymodoce bicarinata, Stebbing Plate X. (C). 



1904, Cymodoce bicarinata, Stebbing, in Gardiner's 'Fauna, Maldive and Laccadive Archip.,' vol. 2, 

 pt. 3, p. 712, pi. 52b. 



The specimen here figured differed from the type by its greater proportionate 

 breadth, being 4 millims. broad by 6 millims. long, while the flagellum of the first 

 antennae was only eleven -jointed, and that of the second fourteen -jointed. But the 

 long genital papillae* of the seventh peraeon segment and the greatly produced 

 inward curving male appendix of the second pleopods and various other features 

 showed close agreement. To judge by other specimens, the breadth is variable. 



Milne-Edwards, 'Hist. Nat. Crust.,' vol. 3, p. 213, 1840, describes C. pilosa as 



* This term is introduced by Dr. H. C. Williamson in the ' Twenty-second Annual Report of the 

 Fishery Board for Scotland,' part iii., p. 101, 1904. For an earlier vague use of it by v. Willemoes Suhm, 

 see ' "Challenger" Amphipoda,' p. 438. 



