1913] Hall: Pijciiogoiiida from the Coast of California 129 



NOTES ON OCCURRENCE 

 Anoplodactylus californicus Hall 



Plate 4, figs. 14, 15, 16 



Described by me (see Hall, 1912, p. 91) from a single female 

 specimen which was swept from Fucus at Laguna Beach, August, 

 1911. In the summer of 1912 we discovered that the usual habitat 

 of this species at Laguna Beach is among the bases of the Phyl- 

 lospacUx which grows at the extreme low tide mark. At that 

 time, July 16, 1912, we took several specimens of both sexes, 

 thus permitting the presentation of figures showing the sexual 

 dimorphism (figs. 14, 15, 16) and the completion of the descrip- 

 tion as follows. 



Male one-fifth smaller than female, with six-jointed ovigers 

 (fig. 16), the last three segments of which are spirally rolled 

 and closely set with spines, most of which point proximally. Sev- 

 eral globular masses of white eggs. Chelae of both sexes often 

 bent in front of the proboscis. Eye-tubercle and abdomen or 

 caudal segment project from their respective ends of the body 

 at about the same angle, inclined but slightly from the perpen- 

 dicular. A protuberance on disto-inferior aspect of second 

 coxal joint about twice as long in male as in female (figs. 14, 15). 

 Opening of the cement gland of male on superior aspect of 

 femur one-third to one-half the way from coxae on legs II, III, 

 and IV (fig. 15). 



Measurements of A. californicus in Millimeters 



Type 



Length (approximate) 3. 3.3 3.6 3. 2,S 



Proboscis 1.5 1.5 1.6 1.2 1.3 



Body 1.5 1.8 2.1 1.7 1.5 



Span of processes II 1.5 1.8 1.8 1.65 1.4 



Caudal segment 6 .53 .65 .4 .5 



Leg III (approximate) 8.5 9. 10.2 7.1 8.7 



The above measurements, as well as those that are given in the 

 succeeding pages of this paper, are taken as follows: Length is 

 the distance from tip of proboscis to tip of caudal segment, the 

 animal being flattened for the purpose, or the measurement 

 approximated ; proboscis is the measurement from base to tip ; 



