SHALLOW-WATER STARFISHES 29I 



The inner adambulacral spinules form a simple marginal row, 

 with three or four spines on each plate, of which the proximal is 

 smaller and sets farther back, so as to be partly overlapped by the 

 distal one of the preceding plate ; the others are rather short, stout, 

 blunt, scarcely tapered, about as long as the breadth of the adambu- 

 lacral plates. Outside the furrow-series, each plate bears an actinal 

 group of about seven to eleven short, stout polygonal spinules or 

 granules, one of which occupies the center, while the others surround 

 it ; those on the side next the furrow-series are much larger and 

 somewhat longer than the rest. 



Oral spinules numerous, short, stout, polygonal, seven or eight on 

 the border of the dentary plate, and a median or sutural epioral 

 group, consisting of a row of six to eight on each plate, with two 

 shorter intermediate or central rows of three or four smaller ones. 



This is a truly arctic and circumpolar species. The description 

 above is from a North Atlantic specimen, collected at Albatross 

 Station, No. 2506, U. S. National Museum (Catalog No. 11428). I 

 have seen no well preserved West Coast specimens perfect enough to 

 figure. 



Off mouth of Qualicum River, Straits of Georgia, in 40 fathoms 

 (coll. G. M. Dawson, teste Whiteaves) ; Marmot Island, Alaska 

 (Ives). 



It has been taken off the northeastern American coast at several 

 stations, between N. lat. 44° 28' 30" and 41° 47', by the U. S. Fish 

 Commission. Often taken by the Gloucester, Massachusetts, fisher- 

 men on the fishing banks, off Nova Scotia and Newfoundland, in 50 

 to 200 fathoms. Occurs off the northern coasts of Norway and 

 Great Britain, and in the Arctic Ocean generally. 



Bathymetrical range, 50 to 471 fathoms on the east American coast, 

 rarely taken below 150 fathoms. 



Mr. Ives recorded a specimen from Monterey, California, which 

 is a very unlikely locality. Perhaps his specimen was Mediaster 

 aqualis. 



CERAMASTER PATAGONICUS (Sladen) Fisher. 



Pentagonaster patagonicus Sladen, op. cit., 1889, p. 269, p. 46, figs. 3, 4; pi. 



xLix, figs. 3, 4. (Off Patagonia.) 

 Ceramaster patagonicus Fisher, op. cit., igiifc, p. 214, pi. xxxvii, fig. 4; pi. 



xxxviii, figs. I, 2; pi. LX, fig. 3. 



Professor Fisher has described and figured a species that he thinks 

 identical with the one described by Sladen from Patagonia, but 

 without comparison of types. 



