178 PROCEEDINGS OF THE ACADEMY OF [1889. 



Ophiocoma scolopexdrina, Lam. 4 Enderbury Island, Phoenix 

 Group, Dr. H. C. Eckstein. 



Ophiopteris antipodum, E. A. Smith. 1 New Zealand, Messrs. 

 Warwick and Argent ; 2 locality undetermined, W. N. Lock- 

 in gton. 



Ophiothrix angulata, Say. 8 Florida. 



Ophiothrix lixeata, Lyman. 7 Key West, Fla., S. Ashmead. 



Ophiothrix oerstedii, Liitk. 2 Key West, Fla., S. Ashmead ; 6 

 (alcoholic) New Providence, Bahamas, Dr. H. C. Wood ; 50 

 (alcoholic) locality undetermined. 



Ophiothrix pentaphyllum, Pennant. 3 Belfast Bay, W. Thomp- 

 son ; 15 " British," Dr. Wilson. 



Ophiothkix RUDis, Lyman. 2 (alcoholic) West Coast of America, 

 Geo Davidson ; 3 locality undetermined, W. N. Lockington. 

 The specimens of this species received from Mr. Lockington agree 



•with Mr. Lyman's description, but the dorsal surface of the arms and 



disk is of a light bluish-gray and the upper arm plates are marked 



each by a central transverse darker band, with a lighter band on 



either side of it. The specimens received from Mr. Geo. Davidson 



answer to Mr. Lyman's description as to color, but have a light 



band on the outer edge of each upper arm plate. This light band is 



bordered on the inside by a faint line of darker. 



Ophiothrix spiculata, Le Conte. 2 (alcoholic) Magdalena Bay, 

 Low. Gal., W. N. Lockington ; 4 (alcoholic) San Diego, Gal., 

 Jos. Jeanes; 6 dried, West Coast of Low. Cal., and Gulf of 

 California and 2 alcoholic locality undetermined, W. N. Lock- 

 ington. 

 I have found it so difficult to determine whether the above forms 



belong to 0. spiculata, Le Conte or 0. dumosa, Lyman that I think 



it probable that these two species represent varieties of one form. 



The color appears to be very variable. 



Ophiothrix suensoxii, Liitk. 1 (alcoholic) Nassau, New Prov- 

 idence, Dr. H. C. Wood. 



Ophiomyxa flaccida, Liitk. 1 (alcoholic) New Providence, 

 Bahamas, Dr. II. G. Wood ; 1 (alcoholic) Bailey's Bay, Ber- 

 muda, Heilprin July 1888; 7 (alcoholic) locality undetermined. 



ASTROPHYTID^. 



Astrophytox costatum, Seba. 1 South Carolina, F. S. Holmes ; 

 1 Cuba, J. G. Howard ; young specimen on Pterogorgia, West 



