2 Records of the Indian Museum. [Vol. XVI ^ 



Genus Acartiella, Sewell. 

 Acartiella major, sp. nov. 

 Acartiella minor, sp. nov. 



In addition there were present examples of Cyclops, Euterpe, 

 Oithona, and numerous Harpacticids and nauplii that I have up to 

 the present been unable to identify. 



The second collection is a smaller one made by Dr. Gravely, 

 Assistant Superintendent, Zoological Survey of India, in the 

 backwater at Cochin, and contained another new species of the 

 genus Acartiella, namely A, gravelyi, sp. nov. 



It is particularly interesting to me to be able to record 

 and describe three new species of the genus Acartiella ; this genus 

 was created by me (Sewell, 1914, p. 245) to accommodate two 

 species from the Rangoon River estuary and the Gulf of Mannar res- 

 pectively, and the occurrence of other species in such widely 

 separate localities as Cochin and the Chilka I^ake leads one to 

 expect that the genus will prove to be represented throughout the 

 brackish and estuarine waters of India. 



Family CENTROPAGIDAE. 



Genus Pscudodiaptomus, Herrick. 



Pseudodiaptomus tollingcri, sp. nov. 



(Plate X, fig. 8.) 



Examples of both sexes were present in the Chilka Lake 

 collection and in a collection from Port Canning in the Gangetic 

 delta. 



? . Total length =1-34 mm. 



The proportional length of cephalo-thorax and abdomen — 

 60 : 40 = 100. 



The head and ist thoracic segments are fused as are also 

 thoracic segments 4 and 5. The anterior extremity presents a 

 uniformly rounded forehead and the rostrum consists of two 

 short stout spines. 



The posterior thoracic margin is armed with a single spine 

 situated towards the dorsal surface and ventro-laterally there 

 is a rounded projection fringed with hair. 



The abdomen consists of four segments, having with the furca 

 the following proportional lengths :^ 



33 : 19 : 19 : 9 : 20 ^ 100. 



The first three segments are each furnished with a row 

 of spines along the dorsal part of the posterior margin, and in 

 addition the ist or genital segment bears a transverse row of 

 needle-like spines across the ventral aspect anterior to the genital 

 opening, and two transverse rows of fine spinules on the dorsal 

 surface. The furcal rami are symmetrical and bear five setae, of 



