DIFFERENT FORMS OF 8TAR.FISEE8. 11& 



pentagonal, with five short arms. The fine large Solaster 

 endeca Eetzius has eleven smooth arms ; it lives in deep 

 water. Crossaster papposus (Mliller and Troschel) is com- 

 mon on a rocky bottom, in from twenty to eighty fathoms, 

 from the Gulf of Maine northward ; it is bright red, and has. 

 thirteen to fourteen spinulated arms. Criiella sanguin- 

 olenta Lutken is a common species on the coast of New 



Fig. Tt.—Archaater vexUU/er, under side ; natural size. — After Wyville-Thompsoti. 



England below low-water mark, and is in some respects like 

 Crossaster. 



More closely allied to Asterias is the Pacific Coast Pycno- 

 podia TieliantJioides Stimpson, which ranges from Sitka to 

 Mendocino, Cal. It is very common in Paget Sound, under 

 wharves. Asterias vulgaris Stimpson represents, on the- 

 iiortheastern coast, the A. rubens of Europe. Asterias 

 polaris (M. and T.) has six arms, and is over twelve inches 



