ECHINODERMS OF SMITHSONIAN-HARTFORD EXPEDITION CLARK 447 



AMPHIODIA GYRASPIS H. L. Clark 



Locality. — Smithsonian-Hartford station 19, Puerto Rico (4-h, 

 E.5454, E.5455, E.5456). 



OPHIACTIS NOTABILIS H. L. Clark 



Ophiactis notabilis H. L. Clark, Proc-. U. S. Nat. Mus., vol. 86, p. 415, pi. 52, figs. 

 1, 2, 1939. 



Locality. — Smithsonian-Hartford station 19, Puerto Rico, (1, 

 E.5590). 



OPHLACTIS SAVIGNYI (Muller and Troschel) 



Locality. — Smithsonian-Hartford station 19, Puerto Rico (6, 

 E.5451). 



OPHIOTHRIX ANGULATA (Say) 



Localities. — Smithsonian-Hartford station 12, Haiti (3, E.5399, 

 E.5400, E.5401). Station 15, Haiti (1, E.5398). Station 19, Puerto 

 Rico (7, E.5395, E.6396) . Station 21, Puerto Rico (11, E.5397, E.5407, 

 E.5416). Station 23, St. Thomas (4, E.5404, E.5405, E.5406). Sta- 

 tion 60, Martinique (2, E.5403). Station 55, Martinique (5, E.5402). 



Notes. — One of the specimens from station 12, Haiti (E.5400), 

 is white with the radial shields, except for the outer and inner ends, 

 violet; the arms are sprinkled with small irregular black dots, and 

 bear interrupted light violet cross bands at about every fourth pair of 

 side arm plates. Another specimen from station 12 (E.5401) has the 

 disk violet with broad light lines on the outer side of the radial 

 shields and central white marks ; the upper and side arm plates are 

 violet and white. As in the preceding specimen, there is no median 

 line on the arms. A specimen from station 19, Puerto Rico (E.5395), 

 has the arms with frequent narrow cross bands and no median stripe. 



OPHIOTHRIX SUENSONII Lutken 



Locality.— Smithsomsii\-B.&rtioYd station 55, Martinique (4, E.5409, 

 E.5410, E.5411). 



OPHIOTHRIX ORSTEDII Lutken 



Localities.— Smithsonmn-Unrtiord station 12, Haiti (11, E.5417). 

 Station 17, Puerto Rico ( 1, E.5412) . Station 27, St. John ( 1, E.5413) . 

 Station 28, St. John (1, E.5414). 



OPHIOTHRIX HARTFORDI, new species 



Plate 53, Figuees 1, 2 



Description.— The disk is 4.3 mm in diameter, flat, pentagonal, 

 with broadly rounded interradial angles. The sides of the pentagon, 

 crossing the arm bases, are straight or slightly concave. The greater 



