28 Pub. Puget Sound Biol. Sta. Vol. 2, No. 33 



found with median rows formed b}^ capitate spines so crowded that the 

 heads almost touched. These correspond to the form L. epichlora alas- 

 kensis siderea of Verrill. — Not numerous, at tide line. 



Genus Pycnopodia 

 Rays many, 20 or more in adult; disk large. Dorsal surface covered 

 with a thick soft integument. Dorsal spines few, sharp, scattered ; marginal 

 spines distinct, ventral ones forming 2 distinct rows ; adambulacral spines 

 crowded, 1 to a plate; minor pedicellariae in large clusters on the dorsal 

 surface and around the spines; major pedicellariae large, numerous. 



1. Pyncopodia helianthoides (Brandt) Stimpson. 



Asterias helianthoides Brandt. 



Description same as for genus. — Numerous, in deep water and along 

 tide line. 



ORDER SPINULOSA 



KEY TO FAMILIES 



A. Surface rough, calcareous ; spine-clusters on raised ossicles, not fan- 

 shaped. 

 B. Disk small; rays long, rounded. (Figs. 7, 8). 



ECHINASTERIDAE (p. 28) 



BB. Disk broad; rays medium, somewhat flattened. (Figs. 2, 5, 18, 19). 



SOLASTERIDAE (p. 29) 



AA. Surface slippery; spine-clusters not on raised ossicles, fan-shaped. 



PTERASTERIDAE (p. 31) 



Family ECHINASTERIDAE 

 Genus Henricia 

 Rays long, terete, gradually tapering. ]\Iadreporite spinulose. Dorsal 

 ossicles closely net-like, papular areas small ; papulae few ; dorsal spines 

 minute, uniform, usually in crowded clusters ; upper marginal spines like 

 the dorsals ; lower marginal spines distinct, larger than upper marginals ; 

 marginal rows of spines separated at base by a row of clustered spinules ; 

 actinal spines like lower marginals ; adambulacral spines in transverse 

 double rows or in clusters of graded spines ; pedicellariae none. Color 

 usually bright orange, sometimes yellowish. 



KEY TO SPECIES 



A. Dorsal ossicles rounded, elliptical or lunate. 1. H. leviuscula 



AA. Dorsal ossicles reniform, or curved, or crescent-shaped with blunt 



tips. la. H. leviuscula liinuln 



1. Henricia leviuscula (Stimpson) Fisher. 



Luickia leviuscula Stimpson ; Cribella leviuscula Verrill ; Henricia 

 leviuscula Fisher. 



