Pycnogonids Collected During the 



Summer of 1914, at Laguna 



Beach 



WILLIAM A. HILTON 



The collection began on July 9 and a few specimens were ob- 

 tained as late as November 15. As there are a number of new 

 records as well as some new points in connection with distribution 

 it seemed best to publish this list for the aid of future workers. 



At Laguna there are three well defined literal regions where 

 pycnogonids are found and in some of these they are very 

 abundant. To a large degree several species are distributed in 

 these regions in such a way as to escape casual observation. 

 Although it is convenient to recognize these three localities, yet it 

 must be admitted that there is some degree of overlapping. The 

 regions are as follows: 1st, under stones at moderately low tides 

 not necessarily far out; 2nd, among coarse polyzoan colonies which 

 are found attached to rock ledges or on the margins of large stones; 

 3rd, the red sea weed locality, especially among those growing on 

 mussels well out on rocky points. 



The specimens were determined by the papers of Cole, Hall and 

 a number of others. As there is some variation in the cephalic ap- 

 pendages and as these are much used in determination, their general 

 character and number of joints are given under the name of each 

 species. Numbers: I for chelifori, II for palpi. III for ovigers. 



Family PALLENID^ 

 Pallene californiensis Hall 

 I 2 j. chelate, II lacking. III 10 j. Slender body. Twenty-five 

 specimens of these were collected, some young and very small and 

 delicate. The strong jaws of the first appendage are especially no- 

 ticeable. The body and legs are very light colored. A number of 

 males were obtained carrying the large eggs which are marked in 

 this genus. Almost all of these were found among the white tan- 

 gled stems and zooids of polyzoans which they closely resembled. 



