Vol. 3] Juda;/. — Ostracoda of the San Diego Begion. 143 



animal. Natatory branch of the antenna well developed ; second- 

 ary branch small in the female, sometimes jointed, sometimes not; 

 in male three- jointed, the third joint reflexed upon the second 

 forming a grasping organ. Mandible strongly built ; basal joint 

 M'ith a large, falcate, reflexed masticating process which is ser- 

 rated on the edge at the tip ; second joint with a backward 

 directed lobe at the base which is armed with a few peculiar 

 spines. First maxilla without masticating process, in its stead a 

 group of long plumose setae ; main portion of limb falcate, with 

 many long, stiff setae on the inner margin ; in front a naked la- 

 mella arises from the main limb. The second maxilla consists of 

 a tongue-like plate which is setose on its inner margin, and a 

 large semicircular lamina which bears many long plumose setae 

 on its margin. The first pair of legs arises directly behind the 

 mouth ; not jointed and without lobes ; bearing some plumose 

 setae on the ventral margin. The vermiform limb has a double 

 row of teeth at its extremity. Furca broader than long, bearing 

 several claws. There are seven pairs of rather large dorsal bran- 

 chiae. 



Cylindroleberis mariae Baird. 



PL 19, figs. 7-11. 



1850. Cypridina mariae, Baird, p. 1257, pi. XVII, figs. 5-7. 



1887. Asterope obJonga Sars, p. 31, pi. I, figs. 5-8; pi. II, figs. 1, 2; pis. V 



• and VI. 

 1894. Cylindroleberis oblonga Miiller, G. W., p. 219, pi. IV, figs. 14-18, 39, 



41, 49-55; pi. V, figs. 1, 4, 5, 13, 14, 33, 41-44; pi. VIII, fig. 4. 

 1896. Asterope mariae Brady and Norman, p. 630, pi. L ,figs. 1-6; pi. LI, 



figs. 11-22; pi. LII, figs. 10-15. 



]\Iale. — Shell higher in front than behind ; dorsal margin more 

 or less arcuate throughout its entire extent; middle portion of 

 ventral margin straight; posterior margin more or less truncate, 

 curving over gradually into dorsal and ventral margins ; rostrum 

 large and distinct; a rather large antennal sinus situated a little 

 below the middle of the anterior margin, directed downward and 

 forward. 



Frontal organ moderately long, bent upward at the base, and 

 slightly dilated in the middle. Antennule six-jointed; fourth 

 joint with a sensory organ at the distal end of the lower margin : 



