Vol. 3] Jiiday. — Ostracoda of the San Diego Region. 27 



branch of the male antenna bent at a sharp angle, forming a 

 proximal and a distal portion ; distal portion almost straight, the 

 right somewhat longer than the left. 



Length: female 4.6; male 2.2-3.0 mm. 



Distribution. Rather widely distributed in the Atlantic 

 Ocean ranging from 60° 31' N. lat. to 37° S. lat. Only one speci- 

 men of this species, a female, was found. It was obtained in a 

 400-fathom catch which was made about half way between San 

 Diego, California, and San Clemente Island. 



Genus Haloc3rpris Dana. 

 Rostral process of the shell short, inconspicuous, with a joint 

 which consists of a tooth on the left valve and a socket on the 

 right. Rostral sinus very small. Hinge at posterior end of dor- 

 sal margin scarcely developed. Free edge of valves strongly 

 rounded and thickly set with long gland cells. Frontal organ 

 alike in both sexes; capitulum club-shaped. Basal joint of sec- 

 ondary branch of antenna without a mammillary process; prin- 

 cipal seta of secondary branch strong, dilated and lancet-shaped 

 at the end. Mandible without a crenulated pad and accessory 

 teeth, but having a broad conical process directed toward the 

 apex of the limb ; a low ridge approaches the base of this process 

 on one side. 



9. Halocypris pelagica Glaus. 



PL VII, figs. 4-7. 



1890. Halocypris pelagica, Glaus, p. 25. 



1890. Halocypris clubia, Miiller, G. W., p. 269, pi. XXVIII, figs. 19, 23, 24, 



30, 35; var. minor. 



1891. Halocypris pelagica, Glaus, p. 78, pi. XXI, figs. 1-11. 



Shell short, ventricose, scarcely longer than high; length 1.1- 

 1.4; height 0.9-1.1 mm. 



Frontal organ rather thick and short; capitulum relatively 

 short and scarcely bent. Antennule strongly curved, with two 

 rectangular bends ; terminal seta much longer than the four sen- 

 sory ones, and armed with a few minute spinules just beyond the 

 middle. Peduncle of the natatory branch of the antenna about 

 twice as long as the short- jointed distal portion which bears long 



