148 VERRILL 



On the east American coast, it is common from low-water mark 

 to 100 fathoms in the Bay of Fundy and off the coast of Nova Scotia. 

 Dredged at more than 100 stations between N. lat. 46 50' and 

 35 I2/ 3"- Off Cape Hatteras and off S. Carolina it is common 

 in 16 to 50 fathoms. Common south of Martha's Vineyard in 50 to 

 150 fathoms. 



In depth, its range is o to 229 fathoms ; in one case recorded from 

 435 fathoms, off Delaware, and once from 1253 fathoms. 



Prof. W. K. Fisher informs me that he has North Pacific speci- 

 mens from the following localities : Stephens Passage, Alaska, Albar 

 tross Station 4253, in 131 to 188 fathoms, rocks and shells; Shelikoff 

 Strait, Station 4292, 94 to 102 fathoms, blue mud and sand. Off 

 Bering Island, Station 4791, in 76 fathoms, rocks. 



The specimen examined by me is from the last named locality, sent 

 by Professor Fisher. 



A closely related form, 5*. gracilis (Per.), occurs in deep water in 

 the West Indies. 



Genus Ctenasterias Verrill, nov. (See p. 53.) 

 Type, C. spitzbergensis (Danielssen and Keren, sp.). 



CTENASTERIAS CRIBRARIA (Stimpson). 

 Plate xxv, figures 3, 4 (type) ; text-figure 7. 



Asterias cribraria STIMPSON, Proc. Boston Soc. Nat Hist, vin, p. 270, 1862. 



Ludwig, Zool. Jahr., p. 288, 1886; Fauna Arctica, p. 482, 1900. Bell, 



Asterise, 1881, pp. 494, 505. 

 Asterias spitzbergensis DAN. and KOREN, Norwegian N. Atlantic Expedition. 



Asteroidea, p. 5, pi. i, figs, i-n, 1884. 



This small, five-rayed species was thus described by Stimpson : 

 "This species has very much the aspect of a Cribrella. Body 

 thick and tumid, with a smoothish appearance resulting from the 

 great number and small size of the spines. Skin rather pliable or 

 coriaceous ; ossicles very slender, but very numerous. Rays five, not 

 contracted at base, and rather higher than broad. Disc rather large. 

 Proportion of the diameters i : 4.8. Ambulacral pores not crowded, 

 and forming two zigzag rows rather than four distinct rows. Some 

 small, acutely triangular major pedicellarige in the furrows. Ambu- 

 lacral spines cylindrical with bluntly rounded tips, forming (except 

 toward the extremity of the ray) two regular rows, two to each 

 plate, and bearing small clusters of minor pedicellariae at their outer 

 bases. Ventral and lateral spines in regular rows, but passing imper- 



