wn ROIDB \ "i NORTH PACIFIC IND LDJACBNT WATBBfl it-iiKK 



If thi> specimen really oame from British Columbia, which is somewhat doubtful, 

 it is a form of mnwmtu The southern-most record of am ■ is Popoff Straits, 

 Shumagin Islands, h is rather odd that, in Bpite of all the collecting thai has 

 been done in Alaskan water- by the Bteamer Albatross, do specimens have been taken 

 anywhere near British Columbia. Vet we have the curious case "f /.</''" x '"""'^ 

 polaris iaiherinai which is founded upon "chance" specimens. 



Professor \ en-ill remarks thai the "species looks more like the tj pica! Bpeci 



riaa of the North Atlantic than any other west coast species known to me." 

 This is partly due to the small size. The young of on ill have the narrower 



rays typical of A • \ for instance 



Allasterias forficvloso. Verrill 10 is a form <>f Asterias amvr< oUeetoni Bell. 



Professor Verrill compares it with Alaskan specimens, bul doe- m.t say wherein 

 it differs from the common Japanese form. 1 have examined the type. 



I have also examined the types of Bladen's Asterccmthion t ubt as v. migratum " from 

 the Straits of Korea. The largesl has B only 17 mm., and i- consequently too -mall 

 to compare with adult specimens. It is likely a form of amursnsis. A. imuri 

 might be expected to occur in the cold area of the Straits of Korea 



I have examined example- of Bell- Asterias roUestoni from Hokkaido (Hakodate 

 and Mororan, on the southern coast): Aikawa, Kiku/.eti; Suruga Bay. While these 

 specimens are variable, they agree in having somewhat narrower rays, more widely 

 spaced ahactinal spines, and especially in having smaller crossed pedicellariae. The 

 inferomarginal pedioellariae >>f the Mororan example range in length from \~ to 

 0.23 mm., with a relatively few giants attaining 0.26 mm In a comparable Kam- 

 chatkan specimen, with K L30 mm., the Bame pedicellariae measure 0.315 to 0.34 

 mm., with a minority attaining o.:>ii mm. (PI. 6 li_ r 3a.) The type of amur* 

 is intermediate hut nearer to the northern extreme. There is little doubt that 



perfect intergradation exists between .1. amurensis and .1. amvretu 



Genus LEPTASTERIAS Verrill 



Ltptasteriat Vabbtju., Proo Boston Soc Xat. Hist. vol. 10, ism;, p 350. Tyj 

 acanthinn muiu-ri Sara; Shallow-water Starfishes, 1914, p. lit').- Sladbn, Chal 

 A-teroidea, 1889, p. 563 fsubgen.). — Pkkkikk. Ebcped. Travaillcur et Talisman, 

 p ins Fishxb, Ann. and Mag. Nat. Biat., >er. 9, vol. 12, 1923, p. 599. 

 ■nstcrias Vkhhii.l, Shallow-water Starfishes, 1914, p. 148 Type, .ti/en'a» spitzbergensis 

 DanielSBen and Koran I.' plaslerias groenlandica f. cribraria\. 



Diagnosis. Asteriinae having adambulacral spine pedicellariae, as in I 

 bul differing in having gonads which open in the actinal interradial angle, usually 



on a low papilliform prominence, two to each interradlus; eggS relatively few and 

 (much yolk); the small specie- known to brood e'_'LT- and young in one case in the 

 stomach); ahactinal skeleton more or less open, the dorsolateral skeleton usually 

 irregular, hut the -pines sometimes in poorly defined longiseries; spun- usually 



small, normally with a -mall or fairly thick collar of pedicellariae; actinal plate- in 



one or two series, sometimes feebly developed; adambulacral plates diplacanthid, 



or mixed diplacanthid and lnonacanthid, or exceptionally mostly monacanthid ; 



adambulacral pedicellariae normally in clusters on the spines, occurring singly, or 



•• l»H, p. IM, t>|. rap. ZoN., Jipui. " Joura. Linn. Soc.. vol. :i. - 



