12 CKVLON PEAEL OYSTER EEPOET. 



Cheval Paar, and five specimens occurred in a tow-net gathering oti' Marichchukaddi. 

 With the five there were four young specimens, two of which did not certainly 

 helong to the same species. In this latter gathering there were also two specimens 

 of a young Idotea. 



Cirolana parva, H. J. Hansen. 



1890, Cirolana parva, Hansen, 'Vid. Selsk. Skr.,' ser. 6, vol. 3, pp. 321, 340, pi. 2, fig. 6-66; 

 pi. 3, fig. 1-lrf. 



1901, Cirolana parva, H. Richardson, 'Proc. U.S. Mus.,' vol. 23, p. 511 (Localities), 



1902, Cirolana parva, H. F. Moom:, 'Bull. U.S. Fish. Com., vol. 20 (for 1900), pt. 2, pp. 166, 

 167, pi. 8, figs. 6-8. 



This species is known from both the East and West Indies, and is probably to some 

 extent variable, since Hansen and Moore agree in saying that the broad, sub- 

 triangular telsonic segment has the rounded apical margin furnished with about eight 

 spines, while in our specimens the number appears to be uniformly six. 



Moore describes the uropods as "short, reaching hardly to end of telson : rami 

 subequal, narrow at ends, bifid, their margins furnished with spines and a few short 

 seta?." But our specimens agree with Hansen's account, according to which the 

 inner ramus reaches beyond the outer and is broader, and with his figure which shows 

 it to lie very much broader, so as to make the term subequal quite inapplicable. 



The first antenna? have the third joint of the peduncle about as long as the 

 composite first and second joint, the nagellum little shorter than the peduncle, 

 nine-jointed in both adult male and female. Hansen gives it as eleven-jointed, 

 much shorter than the peduncle, Moore as eleven- to twelve-jointed. The second 

 antenna? have the first three joints of the peduncle very short, fourth a little shorter 

 than the fifth, nagellum in male twenty-six-jointed, in female twenty- to twenty-two- 

 jointed. A specimen not fully adult, having the fifth pera?opods unarmed and much 

 shorter than the fourth, had the nagellum of the first antenna? seven-jointed, that of 

 the second fifteen-jointed. 



In the maxillipeds the antepenultimate joint is furnished with only four or five seta? 

 on the outer margin. 



The first gnathopods have five blunt spines on the hind margin, the bluntness 

 probably due to wear. At the apex of the inner margin the sixth joint in all the 

 limbs has a rather strong spine. 



The male appendix of the second pleopods is slender, the acute apex slightly 

 incurved, reaching beyond the rami. 



Length, male about 6 '5 millims., breadth 2 millims. ; female about the same size; 

 specimen not adult, 3 millims. long, 1*25 millims. broad. 



Localities: Male, Chilaw Paar, Station LXIX., 8 to 11 fathoms; female with 

 young, Muttuvaratu Paar, 1U fathoms. Specimen not adult, Talaivillu Paar. 



Cirolana, sp. 



The telsonic segment is smooth, triangular, with the apex almost acute, but not 



