20 



PROCEEDINGS OF THE NATIONAL MUSEUM 



distal lobe; proximal lobe with 2 short slender terminal bristles; distal 

 lobe consisting of large smooth curved tooth with a short stout 

 secondary tooth and 3-4 bristles at its base (2 short bristles were 

 observed near upper part of each proximal lobe, but whether or not 

 they originated on the lobe could not be ascertained) . 



Figure 8. — Sarsiella zostericola Cushman, adult ?: a, mandible, medial spines on 1st and 

 2nd endopodite joints; b, mandible, basale, medial view; c, maxilla; d, 5th limb, e, 6th limb; 

 /, frontal organ and medial eye (stippled); g, lateral eye; h, copulatory organ. (Figs, c-g 

 from Point Richmond, Calif., 1.06 mm; figs, a-b, h from Hadley Harbor, Mass., 1.01 mm. 

 Same scale in microns: a-d, f-h; e.) 



Cushman (1906, p. 365) described the copulatory hmb as having 2 

 short setae at the upper end. These setae are probably equivalent 

 to the 2 terminal bristles of the proximal lobe described above. No 

 differences could be observed on the copulatory organs of the 

 specimens of S. tricostata and S. zostericola I examined. 



