Plate 91 



Figure 1. Pisaster brevispinus forma brevispinus. Giant specimen from San Juan Islands, Wash., 

 having much shorter spines than Plate 90, Figure 2, and intermediate with forma 

 paucispinus, X %■ 

 1. Forma paucispinus, Xanaimo, British Columbia. A subforma with very numerous 

 abactinal straight pedicellariae and few small abactinal spines. 



346 



