342 MR. ROBERT GURNEY ON 



spots. In the second leg the penultimate joint is three and a 

 half times as long as the last joint and without cilia. The last 

 joint bears two subequal claws and a recurved seta longer than 

 the last three joints of the leg. The furcal rami are slightly 

 curved and bear two short stout claws and a very short seta at 

 the apex. The dorsal seta is inserted about the middle, and is 

 nearly half as long as the f urea and about the same length as- 

 the longest claw (text-fig. 1 c). Length '4:5--5 mm. ; height 

 •27--28 mm. 



Male. The male differs somewhat from the female, the dorsal 

 margin of the shell being more flattened and the two ends more 

 equally rounded. The tubercles of the right shell are conspicuous. 

 The palp of the right second maxilla is slender, broader at the 

 end, and with a triangular pointed process (text-fig. 1 e) ; the last 

 joint is in the form of a curved blunt-ended claw. The palp of 

 the left side is more or less cylindrical, not dilated at the end, 

 and with a minute tooth in place of the triangular process of the 

 right side. The distal joint forms a curved sharp-pointed claw. 

 The copulatory appai-atus consists of a large triangular lamella 

 with pointed recurved end, and a narrow pointed process hinged 

 to it (text-fig. 1 d). The ejaculatory apparatus has six rings of 

 spines. 



A few specimens only of this species were found in a collection 

 from Colombo Lake, and amongst them was a single male. 



The species resembles Cypria cremdata Sars very closely, and, 

 indeed, may be but a variety of it, but it differs from it in having 

 knobs on both the anterior and posterior margins of the right 

 shell, and also in the presence of brown spots on the shell. 

 Sars gives no particulars of the structure of the male by Avhich 

 a comparison could be made, but he says that the male is exactly 

 like the female in shape, and that is not quite the case with 

 regard to my own specimens. 



Literature. 



Apstein, C. — " Das Plankton im Colombo-See auf Ceylon." 



Zool. Jahrb., Abt. Syst. xxv. 1907, pp. 201-244. 

 Apstein, C. — " Das Plankton des Gregory-Sees auf Ceylon." 



Zool. Jahrb., Abt. Syst. xxix. 1910, pp. 661-680. 

 Brady, G. S. — " Notes on Entomostraca collected by Mr. Haly in 



Ceylon." Journ. Linn. Soc, Zool. xix. 1886, p. 293. 

 Brehm, Y. — "Ueber die Mikrofauna chinesischer und siidasiat- 



ischer Siisswasserbecke]i." Arch. f. Hydrobiol. u. Plank- 



tonk. iv. 1909, pp. 207-224. 

 Daday, E. vox. — " Mikroskopisclie Slisswasserthiere aus Ceylon."' 



Tei-mes. Fiizetek, Anhangsheft zum xxi. Bd. 1898. 

 Daday, E. vox. — " Untersuchungen liber die Slisswasser-Mikro- 



fauna Deutsch-Ost-Afrikas." Zoologica, Bd. xxiii. Heft 59, 



1910. 



