1914 Pomona College Journal of Lntoniology and Zoology, fol.J^Ij No. 4, Dec. 



Preliminary Notes on Some Marine 

 Worms Taken at Laguna Beach 



W. F. HAMILTON 



During the summer of 1914 I made a collection of some 230 

 bottles of annelids. It was thought best that I should publish a 

 list of the families and of such species as I have succeeded in 

 identifying. 



POLYCHAETA 

 SyLLID-E 



Are quite abundant among the finer sea mosses. 



PionosyUis eloigata Johnson. 



Found among goose-neck barnacles west of the Laboratory 

 and in sea weed tangles. White with bright red eggs color- 

 ing posterior end. Taken June 26, 1914. 



Two other forms are common in the finer sea moss. 



POLYNOID^ 



Are of frequent occurrence on rocks and in seaweed tangles. 

 I have identified four species. 



Halosydna insignis Baird. 



The most common and variable polynoid at Laguna. Color 

 of elytra yellowish gray to bright red. Length from 18 to as 

 much as 47 mm. (contracted). 



Halosydna calif oruica Johnson. 



Less abundant. Similar in distribution. More slender and 

 of a lighter pigmentation. 



LepidastJicnia gigas Johnson. 



This interesting form was taken from a large mass of the 

 tubes of Vermetus (squamigerus?) (gasteropod) . Hereto- 

 fore, as far as I know, it has only been recorded as a tube com- 

 mensal with a large Ampliitritc. My specimen was not com- 

 mensal, but was hidden among the mollusc tubes. The color 

 was recorded as a "light, unsaturated yellow, elytra darker 

 yellow, body irridescent below. The setae project only their 

 tips beyond the parapodia, differing only in this respect from 



