Vol. 3] Judaij. — Ostracoda of the San Diego Eegion. 23 



5. Conchoecia clausi (Sars). 



PI. V, figs. 3, 4. 



1887. Halocypris clausii, Sars, p. 87, pi. XI, figs. 7-10; pi. XIV, figs. 6-18. 



1891. Microcovchcecia clausii, Glaus, p. 73, pi. XX. 



1894. ConcJicecia clausii, Miiller, G. W., p. 230, pi. VI, figs. 21, 23-30; pi. 



VIII, figs. 31, 32. 

 1896. Microconchoecia clausii, Brady and Norman, p. 700, pi. LXIII, figs. 



3-9. 



Shell of female short and hig'h; dorsal margin only slis'htly 

 depressed near the middle; ventral evenly and broadly convex, 

 forming: a continuous curve with the anterior and posterior mar- 

 gins ; postero-dorsal angle wide, greater than a right angle ; ros- 

 trum rather large and curved downward; rostral sinus of mod- 

 erate size; in the male the shell is slightly narrower. In both 

 sexes the valves are rather thickly and strongly reticulated; 

 striae well developed over nearly all the surface except at the 

 posterior edge in the female. 



Frontal tentacle of female short, scarcely reaching beyond 

 extremity of antennule ; nearly straight, slightly club-shaped, 

 but with no distinct capitulum; end blunt and rounded: that 

 of the male much longer than the antennule ; capitulum curved, 

 spoon-like, dilated at the base, without hairs. Antennules of the 

 female rather small, indistinctly jointed, bearing four sensory 

 setae, the three posterior of which are furcate, and a long, curved 

 terminal seta; those of the male larger, distinctly five-jointed; 

 bearings two sensory setae, the proximal one of which is rather 

 long- and furcate, the other short and simple ; of the three long 

 setae the distal one bears about eight small button-like nodules 

 which are set in a single row on its inner margin. 



Hooked appendage of the secondary branch of male antenna 

 strongly bent, thickened toward the base ; outer end indistinctly 

 crenulated on its inner margin; in the female the secondary 

 branch of the antenna bears four setae nearly equal in length and 

 a fifth about a half longer. - 



Length: female 0.72-0.74; male 0.75-0.8 mm. 



Height, female 0.55 mm. 



Distribution. Capri, Las Palmas, Funchal (Glaus) ; Messina 

 (Sars) ; Naples (Norman and Miiller) ; San Diego, California. 



