270 RECENT OPHIURANS. 



sharp points ; there are no spines, spinelets, or trifid thorns on the disk. Radial 

 shields rather large, smooth, without granules, but separated radially, as well as 

 interradially by granule-bearing plates. The arms are relatively short (hence 

 the name) and the upper arm-plates are noticeably large; they are triangular, 

 wider than long and so little in contact that the proxmial angle is only slightly 

 truncate. The, under arm-plates are squarish, with rounded corners, the distal 

 margin concave, the proximal convex, rather wider than long, broadly in contact. 

 Color (dried from alcohol), bluish gray; disk darker than arms; oral surface 

 nearly white. 



HoLOTYPE (M. C. Z. 2480) and 1 pahatype (M. C. Z. 3927) Florida: Tor- 

 tug as. 



These two specimens were found among a lot of angulata and were at once 

 seen to be quite different from that species. They have also been compared 

 with young specimens of lineata, orstedii, pallida, and suensonii and are certainly 

 not the young of any of those species. Comparison with numerous Old World 

 species has failed to reveal any form to which they could reasonably be referred. 



811. O. CAESPITOSA Lyman, 1879. Bull. M. C. Z., 6, p. 53, pi. 15, f. 417^20. 



12 specimens, including 1 cotype. New South Wales: Port Jackson; 

 off Broken Head, 28 fms. ; off WoUongong, 55-56 fms.; Jervis Bay. Victoria: 

 Westernport. Australia. 



S12, O. CAPILLARIS Lyman, 1879. Bull. M. C. Z., 6, p. 51, pi. 14, f. 401^04. 



3 cotypes. Philippine Islands: near Cebu, 95-100 fms. 



813. O. CATAPHRACTA von Martens, 1870. Arch, naturg., 36, p. 259. 



3 specimens. PhiUppine Islands, 6-10 fms. 



814. O. DEMESSA Lyman, 1861. Proc. Boston soc. nat. hist., 8, p. 82. Koehlek, 1905. Siboga-exp. 



Oph. litt., pi. 9, f. 5, 6. 



13 specimens, including holotype and 6 paratypes. Hawaiian Islands : 

 Hawaii, Hilo; Maui; French Frigate Shoal. Gilbert Islands. Society 

 Islands. Torres Strait: Murray Islands, Mer. 



815. 0. DUMOSA Lyman, 1860. Proc. Boston soc. nat. hist., 7, p. 252. Plate 12, f. 6. 



4 specimens, including 1 cotype. California: Pacific Grove: San Diego. 

 Mexico : Guaymas. 



