84 Crustacea and Echinodermata of the 



ticularly well represented on the Northwest Coast. Of the 

 Ophiuridce but two species are here known to exist, neither 

 of which can be now specifically indicated, as the speci- 

 mens are not at hand. One is a small Ophiolepis, dredged 

 by me near San Francisco, and the other an Astrophyton 

 taken in Puget Sound by the captain of a coasting vessel, 

 in whose hands it was seen and reported to me by Dr. 

 Cooper. 



HOLOTHURIAD.E. 



HOLOTHURIA CALIFOBNICA. Stimpson, 71. S. 



Body much elongated, of nearly the same thickness 

 throughout ; below, flattened and thickly covered with 

 stout sucker-bearing feet not arranged in rows. Dorsal 

 surface with about forty large conical cutaneous processes 

 (or false feet) sparingly scattered ; between which there are 

 numerous small cirriform feet, also diskless. Tentacula 

 twenty, short, peltate, with broad disks. Color, reddish- 

 brown above ; below, lighter. Length, lj ft. ; thickness, 

 l£ inches. 



Taken in Tomales Bay by Mr. Samuels. 



HOLOTHURIA sncir.KNsis. Brandt. 



Diploperidcris Sitchansis, B&andt; Prod. desc. anim. Mertens., 52. 

 Hob. Sitka, (Mertens.) 



Asi'iDociiiu MEETEKSIL Brandt. 



Aspidochir Mertcnsii, Brandt; Prod, desc anim. Mertens., 46. 



Hab. Sitka, (Mertens.) 



PENTACTA FRONDOSA. Jag. 

 Pentacta frondosa, J.eg- Atres ; Proc. Cat. Acad. Nat. Sci. i. 68. 



The small Pentacta:, found in the vicinity of San Fran- 

 cisco, are referred by Dr. Ay res to this species. 



