ASTEROIDEA 



105 



and more robust in their proximal portion than in the typical form. 

 The three inner sj^ines in the adambulacral comb form a line 

 oblique to the ambulacral furrow. The actino-lateral spines very 

 short, the membrane thus less conspicuous than in the typical form. 

 Only the single specimen known on which Sladen established 

 this variety (60° 5' N., 6° 21' W., 1094 m., "Triton") ; the 

 value of the variety is therefore rather problematic. At least 

 the character of the inner adambulacral spines forming a line 

 oblique to the ambulacral furrow is of no value as a distinguishing 

 character of the variety, since this may be found in the typical 

 form as well. 



2. Pteraster 2)ersonatus Slsiden. (Fig. 61.) 



Rays very broad at base and tapering to a fine extremity. 

 Paxillae with 3-4 or (in the central part of disk) more spinelets, 



Fig. 61. — Pteraster personatus, dorsal side. Nat. size. 

 (From Sladen, Echinod., S.W. Ireland.) 



which appear very protuberant. Suj)ra-dorsal membrane without 

 calcareous bodies.^ Web connecting the spines along edge of jaw 



^ Not stated directly in the original description ; but at least they are 

 not mentioned as present in the membrane. 



