1913] Hall: Pijcnogoiiida from the Coast of California 131 



Lecythorhynchus marginatus Cole 

 Described by Cole (1904, p. 260). Two specimeus of this 

 species were taken from red algae in a tide pool, at Laguna Beach, 

 July 17, 1912. 



Tanystylum intermedium Cole 

 Described by Cole (1904, p. 278). Tliree specimens of this 

 species were taken, two from algae in a tide pool and one from 

 under side of a stone, at Laguna Beach, July 9, and August 13, 

 1912. 



Pallene californiensis sp. nov. 

 One specimen of this species was taken under a stone about 

 half way between tide marks, at upper end of the channel at 

 Coward's Cove, Laguna Beach, August 15, 1912. This is the 

 first representative of this genus or family to be reported from 

 the Pacific Coast of North America. 



KEY TO THE PYCNOGONIDA OF THE WEST COAST 

 A. Oviger 10- or 11-jointed; the first three joints short, sub-equal in size; 

 distal segments spirally rolled, with one to three rows of denticulate 

 spines. 

 B. Chelif ori powerful ; chelae lying before the mouth ; palpi wanting 



or represented in male only by a 1- to 4-jointed stub 



Family Pallenidae 



C. Spines on terminal segment of oviger rounded at tip; often 

 broad distally, never pointed, always finely toothed; last 

 two body-segments usually grown together; with auxiliary 

 claws; chelae finely toothed; oviger usually without term- 

 inal claws Genus Pallene 



D. Body very compact; leg-bearing processes with bases con- 

 tiguous; proboscis three-fourths its own diameter in 



length P. californiensis, n. sp. 



A A. Oviger with ten or fewer joints; first three joints not so much 



smaller than the following joints; distal joints less developed or 



wanting; several feathered spines on distal segments but not 



arranged in rows. 



B. Chelif ori present, not chelate in adult; palpi present; ovigera 



10-jointed, present in both sexes Family Ammotheidae 



C. Body elongate, distinctly segmented; lateral processes well 



separated; chelifori 1-jointed; palpi 9-jointed 



Genus Lecythorhynchus 



D. Proboscis subcylindrical or elliptical, constricted in its 



middle third L. marginatus Cole 



C. Body more or less disciform; segmentation often indistinct; 

 lateral processes approximated. 



