1913] Hall: Pycnogonidn from the Coast of California 133 



B'. Chelifori present, chelate; palpi absent; ovigera present in male 



only, 5- or Gjointed Family Phoxichilidiidae 



C. First trunk segment produced very little, or not at all, anteri- 

 orly beyond base of proboscis; lateral processes well sepa- 

 rated; ovigera 5- jointed 



Genus PhoxichiUdium — P. feraoratum Cole 



C First trunk segment projecting somewhat anteriorly beyond 

 base of proboscis; body concentrated, lateral processes 



closely approximated 



Genus Halosoma — H. viridintestinalis Cole 



C". First trunk segment projecting well beyond base of proboscis, 

 forming a slender neck; body usually elongate, lateral 



processes usually well separated; ovigera 6-jointed 



Genus Anoplodactylus 



D. Caudal segment directed upward; lateral processes well 



separated at the bases A. erectus Cole 



D'. Lateral processes contiguous at the bases 



A. calif ornicus Hall 



B". Chelifori anil i)alpi both absent; ovigera present in the male 



only Family Pycnogonidae 



C. Ovigera 9- or 10-jointed Genus Pycnogonum 



D. 0\igera 10-jointed P. steamsi Ives 



DESCRIPTIONS OF NEW SPECIES 

 Pallene californiensis sp. uov. 



PI. 4, figs. 9-13 



Type ?, in Univer.sity of California collection, Lagnna Beach, 

 Orange Comity, California. August 15, 1912, collected by 

 H. V. M. Hall. 



Description. — Body short, -stout; surface smooth; anterior 

 corners of the first body segment rounded, a considerable gradual 

 constriction of this .joint laterally half way between posterior 

 border of segment and liase of chelifori. Lateral (leg-bearing) 

 processes with bases contiguous. A furrow in the integument 

 makes them appear almost like a pre-coxal joint of the legs 

 (fig. 9). Segmentation distinct between first and second, and 

 second and third body segments. Third and fourth body seg- 

 ments united, but with a line or furrow in the integument across 

 the body anterior to insertion of caudal segment that shows trace 

 of obsolete segmentation lietween these segments. 



