432 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



L. polaris. The spines are paired on practically all the adambulacral 

 plates, not alternating two and one as is usual in small L. folans^ 

 and these spines are slightly longer than the inferomarginal spines 

 instead of slightly shorter as is the case in L. 'polaris. The row of 

 furrow pedicellariae seen in Z. hai'tletti does not occur in L. polaris. 

 The crossed pedicellariae are more expanded distally, and the 

 straight pedicellariae are markedly longer than those of L. polaris. 



From L. groenlandica it is easily distinguished, aside from the 

 larger number of arms, b}^ the irregular and close-meshed skeleton 

 and the abundant abactinal pedicellariae, especially on the disk, as 

 well as by the double adambulacral spines. 



In addition to numerous 5-armed specimens of L. groenlandica 

 there is at hand for comparison one with six arms from Etah, 

 Greenland, collected by Walter Koelz on August 2, 1925 (U.S.N.M. 

 No. E.1251). 



LEPTASTERIAS (LEPTASTERIAS) GROENLANDICA (Liitkcn) 



Localities.— 11 (E.5760). XV (E.5744, E.5799, E.5803). XX 

 (E.5720). Six specimens. 



LEPTASTERIAS (LEPTASTERIAS) species 



Locality. — Yl (E.5832). One specimen. 



A^ote. — This specimen is too young for definite determination. 



STEPHANASTERIAS ALBULA (Stimpson) 



Localities.— 11 (E.5759). Ill (E.5756, E.5767, E.5809, E.5817). 

 IV (E.5755). XI (E.58-17). XII (E.5846, E.5851, E.5874). Fifty- 

 nine specimens. 



Notes. — The largest specimens, in which 11=25 mm., are from 

 localities XI (E.5847) and XII (E.5846). From these two localities 

 there are three specimens with seven rays. 



CRINOIDEA 



POLIOMETRA PROLIXA (Sladen) 



Locality. — XXI (E.573G). Three specimens. 



HELIOMETRA GLACIALIS (Leach) 



Localities.— Ill (E. 5758, E.5815, E.5825). VII (E.5843). VIII 

 (E.5814). IX(E.5844). XI (E.5845). XII (E.5841,E.5842). XIX 

 (E.5729). XXI (E.5735). Thirty-nine specimens. 



Note. — The largest specimens, with arms up to 230 mm. in length, 

 are from localities IX and XI. 



