Plate 53 



Leplasterias hexactis vancouveri (Perrier) San Juan Islands, Wash. (See texl for explanation of 



variationsi 



Figure 1. Specimen with broad carinals, groups of abactinal spinelets in longiseries, numerous 

 superomarginal spinelets (1« ', 6 l ), -1.1. 



2. Specimen with narrower carinals (la 1 , fe 2 ), 1%. 



3. Side view of ray of a specimen in Class la 1 , 6 2 to show vertical combs of spinelets, l\. 



4. Specimen with numerous superomarginal spinelets bu1 groups of abactinal spinelets not 



in appareni longiseries (la 2 ). 



5. Specimen belonging to Class II, in which the superomarginal spinelets average three; 



this specimen is intermediate between a 1 and a- and suggests Leptasterias camts- 

 chatica, 1 : ,. 



6. Small specimen of Class III (superomarginal spinelets two, sporadically three with 



abactinal spinelets in longiseries (a 1 ), X2. 



7. 8, 9. Three specimens belonging in Class 111, lint with more or less irregularly arranged 



dorsolateral spinelets (a 2 ), XI';. 

 308 



