1913] Hall: Pycnogonida from the Coast of California 135 



fringe of hairs usually apparent at the distal end of each joint 

 in all the legs (fig. 9). 



Color pale straw, no markings in color. Measurements (in 

 millimeters); length 1.25; proboscis 0.27; body 0.93; caudal 

 segment 0.15; span of processes II, 0.6; leg III (approxi- 

 mately), 4.05. 



Remarks. — One specimen, a female, was taken under a stone 

 half way between tide marks. The species is apparently rather 

 rare, for our seaeh for Pycnogonida living under stones was 

 very careful and was continued all summer, every time the tide 

 was low enough for collecting. This is the first member of the 

 genus and family to be reported from the Pacific Coast. 



Comparisons. — General form of the body somewhat similar 

 to that of Pallene laevis Hoek (1881, p. 78). The proboscis is 

 not pointed nor is it nearly as long as that of P. laevis, nor does 

 the oviger end in a claw in my species. The proboscis is more 

 like that of Pallene empusa Wilson (1878, p. 476). The general 

 shape of body segment I is much stouter than in P. empusa and 

 many other features distinguish the two species. 



Ammothea nudiuscula, sp. nov. 



PI. 3, figs. 1-8 



Type c? and $, in University of California collection. Key 

 Route Pier, San Francisco Bay, ]\Iareh 27, 1912, collected by 

 G. E. Stone among hydroids and bryozoans. 



Description. — Body short, stout; surface pitted but not 

 deeply nor closely so; segmentation indistinct; anterior corners 

 of first body segment rounded; lateral (leg-bearing) processes 

 grown together for nearly their whole length (figs. 1, 4). 



Proboscis about the length of the body as far back as the 

 base of caudal segment; spindle-shaped, with rounded anterior 

 corners between which is a vertical notch; not depressed to any 

 extent in either sex, largest diameter half way from base to tip ; 

 no constriction on distal half. Side view (fig. 2) shows upper 

 side of proboscis more convex than lower side. Transverse diam- 

 eter of proboscis about half its length in the male, vertical diam- 

 eter a little less than transverse. Proboscis of female rather 

 broader than that of male. 



