.14 S 



THE AMEBIC AN NATURALIST [Vol. XLIII 



Dermasterias imbricata is a common five-rayed or pen- 

 tagonal species, but we have one regular, six-rayed, young 

 specimen from Sitka. The majority of our specimens 

 have numerous large bivalve and trivalve pedicellarise in 

 rows, below, and smaller ones dorsally, though most 

 writers describe it as destitute of pedieellariae. A regular 

 six-rayed Henricia hcv'niscula from Alaska occurred, and 

 also a six-rayed H. sanguinolenta var. pectinata from 

 Bering Sea. 



Solaster Stimpsoni Ver. == Crossaster vancouverensis 

 De Loriol, 1897. One specimen of this species from 

 British Columbia has one of the rays forked below, near 

 the mouth, thus producing ten regular rays as seen from 



Pisaster ochraceus (Br.). One medium-sized specimen 

 from Monterey and a large one from British Columbia 

 have six regular rays. 



Asterias (Leptasterias) hexactis (St.). Several five- 

 rayed specimens from Sitka agree with the typical six- 



