1918.J R. B. S. SewelL : New species of Copepoda. 15 



The proportional lengths of the end segments are as follows : — 



Segments 13 : U : 15 : 16 : 17 : 18 : 19-21 ; 22-25. 



45 : 48 : 41 : 48 : 57 : 123 : 109 : 140. 



Segment 17 bears a tooth-plate that slightly overlaps the 

 following segment ; segment 18 bears a tooth-plate and is armed 

 with the usual two fang-like spines distally ; segment 19-21 bears 

 two tooth-plates, both of them spine-like, the distal being much 

 the longer and overlapping the next segment; segment 19-21 

 also bears two setae, a terminal one and a small one about 

 the middle of the length of the toothed surface. All tooth- 

 plates are provided with fine needle-like teeth ; on the proximal 

 plates these are long, but on the distal plate of segment 19-21 

 they are very short. 



The ^th pair of legs. — On the right side the basal joint is 

 produced in a double fiat process, the outer division being sharply 

 pointed and the inner one rounded and wing-like. Each leg con- 

 sists of three segments having the form typical of the genus. 



On the right side exopod i bears a marginal seta ; exopod 2 

 bears a single internal seta and exopod 3 terminates in a sharp 

 point and bears a single seta on its inner margin. 



On the left side exopod i bears a marginal seta ; exopod 

 2 carries a distal marginal spine, and exopod 3 bears one marginal 

 spine and three end-spines. 



Acartiella minor, sp. nov. 



(Plate IX, fig. 6 and Plate X, fig. 7.) 



Examples of both sexes were present in the Chilka I,ake 

 collection. 



9 . Total length = I"i4 mm. 



Proportional length of cephalo-thorax and abdomen — 



67 : 33 : = 100. 



The head and ist thoracic segment are separate and thoracic 

 segments 4 and 5 are fused. 



The forehead presents a rounded curved surface and the 

 rostrum is absent; the posterior thoracic margin is rounded and 

 devoid of spines. 



The abdomen consists of three segments, having with the furca 

 the following proportional lengths : — 



31 : 20 : 26 : 23 = 100. 



The f ureal rami are asymmetrical, that of the right side being 

 the longer; the furcal setae are as in A. gravelyi , the 5th seta 

 arising from the external margin about the middle of the segment, 

 while the 2nd seta is much longer than the rest. 



The 1st antennae. — This resembles that of A. gravelyi ) when 

 folded back it reaches to the middle of the ist abdominal seg- 

 ment. 



