﻿FRESH-WATER OSTRACODA FROM BRAZIL — TRESSLER 73 



Specific characters. — Female: Elongated forms with evenly arched 

 dorsal margin and almost flat ventral margin, which is only slightly 

 siniiated. Both ends about equally rounded. Submarginal line 

 widely removed from the free margins. Pore canals very prominent 

 and forming a wide band at both ends and to a lesser extent on dorsal 

 and ventral margins. From above, compressed with left valve slightly 

 longer than right and projecting anteriorly in front of right valve. 

 Margins of valves quite hairy. Natatory setae of second antennae 

 reach to the tips of the terminal claws. Spines of third masticatory 

 process of maxilla moderately toothed. Second leg with a curved 

 terminal claw, which is equal to about one-third the length of the 

 penultimate segment. Furca long and narrow. Posterior half of 

 dorsal margin armed with heavy teeth in one member. In the other 

 furca much smaller teeth are found in the distal ninth of the ramus. 

 Claws strong, very unequal and armed with heavy teeth. Terminal 

 claw less than one-half the length of the ramus; terminal seta almost 

 as long as the terminal claw. Length 1.23 mm.; height 0.50 mm. 



Male: Unknown. 



Material examined. — Thirteen specimens were collected by Dr. 

 Kleerekoper from a reservoir in Campinas, Sao Paulo (March). 



Recorded distribution. — India (Baird, 1859); Ceylon (Brady, 1886, 

 and Daday, 1898); Australia (Sars): Celebes, Sumatra, and East 

 Africa (Miiller, 1912); Yucatdn (Furtos, 193G); Philippines, Celebes, 

 Hawaii (Tressler, 1937). 



Genus HERPETOCYPRIS Brady and Norman 



Cypris Baird (part), Hist. Berwick Club, vol. 1, p. 98, 1835. 



Erpetocypris Bradt and Norman (^part), Trans. Royal Dublin Soc, set. 2, vol. 4, 



p. 84, 1889. 

 Herpetocypris Sars, Forh. Selsk. Christiania, 1889, No. 8, p. 34, 1890. 



Shells elongate with height usually less than half the length. Sur- 

 face of valves with scattered puncta between which occur, with one 

 or two exceptions, numerous smaller puncta. Third masticatory- 

 process of maxilla with two strong spines. Furca strongly developed, 

 with two claws and two setae. Dorsal seta located less than the width 

 of the ramus from the subterminal claw. Terminal claw much less 

 than one-half the length of the ramus. 



HERPETOCYPRIS MUHITIS, new species 



Figure 13, m-o 



Specific characters, — Female: Height about one-half the length and 

 highest in the anterior third. Dorsal margin slightly concave and 

 sloping from the anterior highest point in ocular region to the posterior 

 margin. Ventral margin slightly convex. Both ends rounded, the 

 anterior end more broadly than the posterior. Inner duplicature in 



