20 



m | .i.KTIN 76, IN'ITED STATES NATIONAL MUSEUM 



are shown crossed and straight pediceUariae, and on Plate 78, Figures 4, a to e, 

 straight pediceUariae. The crossed pediceUaria, Plate 77, Figure 3a, is quite inac- 

 curatelj dray a, as il is unlike any found in this form. The straight pediceUariae are 

 also incorrectly drawn. 



The two badlj beach-worn examples from Cape Lisburne, Alaska, were picked 



up at the "coal station" after a northwest gale of four days, September 11 to 15, 



1885, l'.\ Benrj D. Wbolfe. They constitute the only undoubted Arctic Ocean 



..,1 and are notable for their thick, mostly cylindrical, round-tipped spines about 



0.9 id 1 nun. Long and 0.45 to 0.6 mm. thick. The marginal and ventral spines are 



i hick, and not particularly different from St. Michael or Bristol Bay specimens. 

 The Btraighl pediceUariae of the ventral surface (pi. 7, fig. 4) are, if anything, a little 

 larger than in Bristol Bay examples, many reaching a length of 0.9 mm. (0.65 to 0.9 

 mm.). Tiny arc relatively narrower. The abactinal straight pediceUariae average 

 0.45 mm., sometimes smaller, and are about the shape of the ventral pediceUariae 

 .,! the Bristol Bay specimen, station 3231. (PI. 7, fig. 2.) The ventral crossed pedi- 

 ceUariae arc about 0.315 to 0.35 mm. (some as small as 0.23 mm.) and are similar in 

 detail to the abactinal, which are a trifle smaller (0.28 to 0.3 mm.). Figures of the 

 Bristol Bay (pi. 6, Bgs. 5, 5a) and Cape Lisburne (pi. 6, fig. 6) specimens will bring 

 out the sUght differences. 



Type. — In the University Zoological Museum, Copenhagen. 



Type locality. Amur country (northern part of Gulf of Tartary) eastern Asia. 



Distribution. — Arctic Ocean, north of Bering Strait; Bering Sea; Okhotsk Sea, 

 and the Asiatic coast south to northern Japan where the species intergrades with 

 rollestoni. On the American coast the Shumagin Islands constitute the only certain 

 record 9 south of the Alaskan Peninsula. Vertical distribution, low tide to 93 fathoms. 

 Temperature records 32.2° to 45.5° F., the latter probably several degrees too high. 



Specimens examined. — Eight hundred and sixteen. 



Specimens of Aslerias amurensis examined 



!•• caw of Parailerias albertt nth. labeled as from British Columbia, is very perplexing. The species appears to be Atteriaa 

 amureruii. There Is a po~ the specimen may have been transported by ship; or to it it may have been picked up as 



■ I in rcmiI faith by the donor. 



