26 Univeysifij of Califmiiia FubJicaiious. [Zoology 



and three shorter, sensory fihiments : the basal third of the sen- 

 sory filaments is armed with a few minute hairs; mammillary 

 process rather large and blnnt. The first unguis is slender and 

 not pectinate; the others gradually increase in length and are 

 strongly pectinate. 



Length of female, 5.1 mm. 



The male of this species is unknown. Four females were ob- 

 tained in a 400-fathom plankton catch which was made about 

 half way between San Diego, California, and San Clemente 

 Island. 



I take great pleasure in naming the species for Dr. William 

 E. Ritter, Director of the San Diego ilarine Biological Station. 



S. Conchoecia daphnoides (Claus). 



PI. VII, fig. 3. 



1891. Concliaecilla daphnoides, Clans, p. 68, pi. XV. 



1896. Coiichoecilla daphnoides, Brady and Norman, p. 697, pi. LXIV, fig. 22. 



1896. Conchcecilla lacerta, Brady and Norman. ]i. 697. pi. LXII, figs. 1-4; 



LXV, figs. 1-10. 

 1901. Conchoecia daphnoides Miiller, G. W., p. VII 6, figs. 11-14. 



Shell very nmeh elongated, in the female al)out five, in the 

 male about three times as long as high. In the female the rostral 

 process is unusually long and slender, the left noticeably longer 

 than the right. The posterior part of the shell is produced into 

 a long spine-like process, which in the female constitutes about 

 a fifth and in the male about a fourth of the length of the shell ; 

 its lower margin passes over with a convex line into the distinctly 

 ai'ched ventral margin; each valve of the process bears a series 

 of marginal spinules. On the right valve below the rostral sinus 

 is a small projection on which there is a gland opening. Shell 

 distinctly striated, but the course of the striae varies. 



Frontal organ of the female straight, the capitulum rather 

 distinctly separated from the peduncle; dilated and armed with 

 fine hairs on its ventral margin. The principal seta of the an- 

 tennule of the male is armed with long, slender spines which are 

 very thickly set and directed backward ; they extend proximally 

 as far as the outer ends of the neighboring sensory setae. Both 

 the right and the left hook-shaped end joints of the secondary 



