clark: ophiuroidea. 439 



Ophiothrix galapagensis. 

 Lutken and Mortensen, 1899. Mem. M. C. Z., 23, p. 181, pi. 20, fig. 1^. 



These are very typical specimens, with disks 5-7 mm. across. 

 Station 4642. Galapagos Islands: Hood Island, 4 miles southeast 

 of Ripple Point. 300 fms. Bott. temp. 48.6°. Brk. sh., glob. 

 Three specimens. 



Ophiothrix longipeda. 



Ophiura longipeda Lamarck, 1816. Anim. sans vert., 2, p. 544. 

 Ophiothrix longipeda Miiller and Troschel, 1842. Syst. Ast., p. 113. 



There is a single specimen from Papeete, Tahiti, of this well-known 

 species and two others with only the label "35 ". The significance of 

 this number is unknown. 



Ophiothrix spiculata. 



Leconte, 1851. Proc. Acad. nat. sci. Philadelphia, 5, p. 318. 



These specimens range in disk-diameter from 4 to 7 mm. and are 

 quite typical of the species. 



Panama: Perico Island. Tobaquilla Island. 

 Fifteen specimens. 



Ophiothrix trilineata. 



Lutken, 1869. Add. ad hist. Oph., pt. 3, p. 58, 100. 



These are very typical specimens of this handsome and wide-spread 

 species, but all are small, the disk-diameter ranging from 3 to only 

 6 mm. 



Paumotu Islands: Makemo. Fakarava. 



Thirty-four specimens. 



Ophiochitonidae 

 Ophionereis annulata. 



Ophiolepis annulata Leconte, 1851. Proc. Acad. nat. sci. Philadelphia, 6, 



p. 317. 

 Ophionereis annidata Lyman, 1860. Proc. Boston soc. nat. hist., 7, p. 203. 



