106 Bulletin, Vanderbilt Marine Museum, Vol. IV 



similarly paved with similar smaller scales, which are rather con- 

 spicuous along the ahactinal margin of disk. Radial shields broad 

 pear-seed shaped, contiguous at base; in this, which differs even in 

 pairs on the same disk, the present specimens differ from the figures 

 given by Lutken and Mortensen. A few scales separate the distal 

 portion of the paired radial shields in the three young specimens 

 before me. 



The mouth-shield is rhombic, varying quite a little in width. The 

 side mouth-shields are slender, tapered inwardly, not quite meeting. 

 Mouth papillae, three blunt ones on each side of a jaw, and two 

 pointed teeth at the apex. The under arm-plates are somewhat rec- 

 tangular, wider than long, with the outer margin concave in the 

 middle and rounded on either side, and the inner margin correspond- 

 ingly convex, the side margins relatively straight. The side arm- 

 plates bear three strong, tapered spines. The upper arm-plates are 

 short and quite wide with the outer margin rounded at the angles. 

 References: Amphiura diomedeae Lutken and Mortensen, Mem. 

 Mus. Comp. Zool., vol. 23, pt. 2, p. 151, pi. XII, figs. 1-7, 1899.— 

 H. L. Clark, Bull. 75, U. S. Nat. Mus., p. 140, 1911 ; Mem. Mus. 

 Comp. Zool., vol. XXV, p. 225, 1915. 



Genus : hemipholis Agassiz, Mss., Lyman. 

 Hemipholis elongata (Say). 



Plate 62. 



Type: Say's type comes from Charleston Harbor, S. C, and is 

 deposited in the Philadelphia Academy of Natural Sciences. 



Distribution : Charleston, S. C. ; Turtle Harbor, Florida ; Desterro, 

 Brazil. Littoral. 



Material examined: One specimen, dredged by the "Ara" in 

 Turtle Harbor, Florida, April 14, 1923. This apparently establishes 

 the first Floridian record of the species. Cat. no. 218. 



Habits : Stimpson reports that this species ' ' is gregarious, living in 

 companies of twenty to thirty. The existence of these groups is indi- 

 cated at low water by spaces of about a foot in diameter, covered with 

 small holes, looking very much as if a charge of shot had been fired 

 into them. If these spots are watched as the tide rises, from each 

 hole an arm of one of the starfishes will be seen to protrude, and 

 wave about in the water. Generally each individual sends up one of 

 its rays in this manner." 



