108 Bulletin, Vandcroilt Marine Museum, Vol. IV 



seven arm-spines are stout with tapered apices; the spines are of 

 slightly unequal length, those of each series gradually increasing in 

 length from the ventral to the dorsal side of the arm. 

 References : Ophiura elongata Say, Journ. Phila. Acad. Nat. Sci., V, 



p. 146, 1825. 

 Ophiolepis elongata Stimpson, Proc. Boston Soc. Nat. Hist., IV, p. 



225, 1854. 

 Amphiura elongata Lutken, Addit. ad Hist. Oph., pt. 2, p. 222, pi. 3, 



fig. 2, 1861. 

 Hemipholis elongata Agassiz, Mss. — H. L. Clark, Mem. Mus. Comp. 



Zool., XXV, p. 237, 1915. 

 Amphiura cordifera Lyman, Proc. Boston Soc. Nat. Hist., VII, p. 258, 



1860. 

 Hemipholis cordifera Lyman, Mem. Mus. Comp. Zool., I, p. 137, pi. 1, 



figs. 1, 3, 1865, (color plate). 



Genus : OPHIOPHOLIS Muller and Troschel. 



OpMopholis aculeatus (Linne). 



(Daisy Brittle-star). 



Plate 63. 



Type: Linnaeus stated merely that his type inhabits the ocean. 



Distribution : Circumpolar in Arctic waters ; in Europe extending 

 down to the Scandinavian coasts to the Danish shores; also to the 

 southern shores of the British Isles. It is also found in Iceland and 

 Greenland and on the East American coast down to Cape Cod; on 

 the West American coast as far south as California, and on the Asiatic 

 coast down to Japan. Bathymetrical occurrence: low tide-line down 

 to 1880 meters. 



Material examined: One specimen, dredged in 200 fms., 9 miles 

 S. W. by W. of Port Basque, Newfoundland, September 1, 1926. 



Habits: This is a sluggish brittle star which spends much of its 

 time in rock crevices, feeding on the particles in the detritus. It has 

 been found in the stomachs of codfishes. 



Color: Frequently variegated, mostly red, more rarely with the 

 disk bluish. American specimens frequently have the arms cross- 

 banded. 



Technical description: Young specimen: Disk diameter 9 mm., 

 arm length 25.5 mm. Disk covered with numerous granules among 

 which small spines are abundantly scattered, excepting the primary 



