214 RECENT OPHIURANS. 



shape and roughness of the upper and under arm-plates and in the shape of the 

 oral papillae. It differs from vitrea in the disk-covering, in the much less thorny 

 arm-spines and in the shape and roughness of the upper and under arm-plates. 



388. O. POLYPLOCA H. L. Clark, 1911, Bull. 75 U. S. N. M., p. 193, f. 90. 



7 PARATYPES. Japan: off Kagoshima Gulf, 103-152 fms. 



389. O. RUGOSA Koehler, 1904. Siboga-Exp. Oph. mer prof., p. 139, pi. 26, f. 4-7. 



1 coTYPE. Dutch East Indies: off southwest end of Timor, 217 fms. 



390. 0. VITREA Lyman, 1878. Bull. M. C. Z., 6, p. 156, pi. 8, f. 218-221. 



3 specimens, including 1 cotype. Off Admiralty Islands, 150 fms. 

 Philippines: off Cebu, 95-100 fms. 



Species of Ophiocamax not represented in the M. C. Z. 



391. O. AUSTERA Verrill, 1899. Bull. Univ. Iowa, new ser., 1, no. 6, p. 60, pi. 6, 7, f. 2. Cuba: off 



Havana, 110 fms. 



392. 0. DOMINANS Koehler, 1906. Mem. Soc. zool. France, 19, p. 21, pi. 1, f. 15, 16. South of 



the Canary Islands, 490 fms. 



393. 0. GIGAS Koehler, 1900. Bull. Acad. Belgique, p. 820. 1901. Belgica Ech. et Oph., pi. 2, f. 



13-15. West Antarctica, 165-195 fms. 



394. O. LITHOSORA H. L. Clark, 1911, Bull. 75 U. S, N. M., p. 191, f. 89. Eastern Sea, 361 fms. 



Ophiacanthella. 



Verrill, 1899. Bull. Univ. Iowa, new ser., 1, no. 6, p. 39. 

 Type-species: Ophiacantha iroscheli Lyman, 1878. Bull. M. C. Z., 5, p. 142. Monotypic. 



395. O. TROSCHELI (Lyman). 



Ophiacantha troscheU Lyman, 1878. Bull. M. C. Z., 6, p. 142, pi. 9, f. 222-224. 

 Ophiacanthella iroscheli Verrill, 1899. Bull. Univ. Iowa, new ser., 1, no. 6, p. 39. 



4 specimens. Off St. Vincent, 124 fms. Off Barbados, 73 fms. 



Ophioprium, gen. nov. 



Type-species: Ophiacantha ceriticornis Lyman, 1883. Bull. M. C. Z., 10, p. 257. 



Verrill, (1899, Bull. Univ. Iowa, new ser., 1, no. 6) established the genus 

 Ophiopristis for this species, and several others (p. 40) but he definitely desig- 



