RECENT OPHIURANS. 263 



757. O. LORICATA Lyman,- 1869. Bull. M. C. Z., 1, p. 331. Plate 10, f. 3, 4. 



HoLOTYPE and 2 paratypes. Florida: off Alligator Reef, 110 fms. 



758. O. LUTEOMACULATA, sp. nov. {lulem, yellow + maculalus, having spots). Plate 11, f. 7, 8. 



Disk 3.5 mm. in diameter; arms 10 mm. long. Disk covered by the com- 

 pact group of 6 primary plates, about 15 other large plates, some 25 small, more 

 or less triangular plates (space-fillers between the large ones), and the radial 

 shields. The latter are triangular, .75 mm. long by .40 mm. broad at the distal 

 end where they are in contact. None of the disk-plates bear spinelets but in 

 the interradial areas, the finer scahng which covers the lower surface is plainly 

 visible and some of those scales, especially where they help form the disk-margin, 

 carry stout, blunt httle spines. Upper arm-plates large, fan-shaped, only sUghtly 

 in contact. Oral shields rather large, rounded pentagonal, much wider than 

 long. Adoral plates relatively big, short, and wide, meeting in the mid-radial 

 fine but widely separated proximal to oral shield. Oral papillae large, scale- 

 like, one on the inner end of each adoral plate. Under arm-plates beU-shaped, 

 about as long as wide, wider distaUy than proximally, only the basal ones in 

 contact. Side arm-plates rather conspicuous, meeting below (outside of disk), 

 and nearly meeting above ; each carries 3 (rarely 4) short, thick, blunt arm-spines, 

 the uppermost, the longest and about equal to a joint. Tentacle-scale, 1, large, 

 oval. Color (dried specimen, never in alcohol), greenish white, clouded with dull 

 olive-green; radial shields duU yellowish; arms indistinctly banded, greenish 

 white and dull olive. In life, the green shades were much brighter and the radial 

 shields were bright orange-yellow (hence the name). 



HoLOTYPE (M. C. Z. 3730). Torres Strait: Murray Islands, Mer, off south- 

 western reef, 18 fms., on a sponge. Oct. 13, 1913. Carnegie Exp., 1913. H. L. 

 Clark coll. 



The short arms, large smooth disk scales, fan-shaped upper arm-plates, 

 single oral papillae and peculiar adoral plates make a combination of characters 

 which readily distinguish this species. The color is also probably distinctive 

 but it is doubtful if it would be preserved in alcohoUc specimens. 



759. O. MACULOSA von Mabtens, 1870. Arch, naturg., 36, 1, p. 248. Plate 11, f. 3, 4. 



18 specimens. PhiUppine Islands. 



760. O. MttLLERI Hjtken, 1856. Vid. mcd., p. 12. Plate 11, f. 5, 6. 



37 specimens. South Carolina: Charleston. Florida: west of Tortugas, 

 37 fms.; off Garden Key, 8-15 fms.; off Turtle Harbor, 12 fms. Off St. 



