raaoiD] \ ci nobis i'\i in. am> \ 133 



8jh Sixty-six. 



Bering [aland (Nikolaki), shore rocki 15, 1906, .1/'' ■ ■ 



Bering [aland (Nikolaki . 5 to in fati. inea, algae, l il 1 "> 



1879, Vega expedition. 



Medni [aland, ahore ; II specimens, Juni 6, Albai 



Simushir (Milne Baj . Kuril [alanda, 6 Bpeoimena, June - Albatro 



LKPTASTKKIAS U.ASKENS1S MOT I [SPIN \. warn .uhaporlm 

 PUtl 



da$ken*U Veiiiiii.i., p 



Differing from /.. ale Ueutian region in 



having alenderei rays, slenderer Bpinelets, and notably smaller bivalved -^i rnij^h t 

 pedicellariae. Abac tmal spmeleta unequal; quite slender, ones associated with stouter, 

 Bubclavate, scarcely subcapitate Bpinelets arranged in a cloae irregular reticular 

 pattern or without definite ement; carina! Bpinel< ifferentiated 



omarginaJ spines, oaually two, or one at base oi ray, typicaUy slender; Lnferomar- 



Is usually two (some tin i actinals small, ; and n. vet 



extending beyond middle "i" ray. K l"> nun , r 10 mm.; breadth <>f ray at 1 

 10 or 1 1 mm. 



Xhi outhern extension of i . which reaches its eastern limit 



a i Codiak 1-1 a i ul and Cooks Inlet Mvltispina shows it- relationship bj the nun I 

 and arrangement of tin' abactinal Bpinelets (which however air weaker ami by what 

 might la- called the relics oi the characteristic bivalved pedicellariae The position 

 >>f thf Buperomarginal plates rather low on the aide of ray ami the reduction of the 

 actinals t<> a short series of rather inconstant development indi relation- 



ship with <//•' 



/», ., • [prion Abactinal surface well arched bo that ray appears cylindrical with 

 a flattened, narrow, actual surface Lbactinal spinelets, without any regular 

 arrangement, are very numerous, fairly slender, rather uniform in length hut unequal 

 in caliber, cylindrical, tapered, or slightly clavate hut not normally capitate Since 

 they stand on a close irregular reticulate skeleton they show a similar pattern in 



rrupted by the absence of a Bpine here and there In - pme- 



horter ami of more uniform thickm 



Superomarginals generally two. or irregularly one proximally; occasionally three. 

 slightly tapered, blunt, only a little longer than adjacent abactinals Supramarginal 

 channel fairly broad proximally. [nferoi nspicuou ially 



the lower of the usually two Bpinelets; sometu 

 a triangular group. 



The adambulacral Bpinelets normally alternate : ilarly one and two. 



a- i- bo commonly the case in 'I are nearlj a- long as the 



inferomarginals hut much slenderer, terete, slightly tapered, blunt, while the furrow 



e of the diplacanthid plate- i- shorter, slenderer, and usually a little more tapered 



then the , niter The posture of the -pines frequently i- BUCh that the: 



he three series along the furrow margin. The fit adore! adnmhularrnl 



plates are in contact interradially w bile those of the fourth pair an thor 



in 



