346 INVERTEBRATA OF MASSACHUSETTS. 



HOLOTHU'RIA (CUVIE'RIA) SQUAMA'TA, MULL. ; Zool. Dan. En- 



cyc.M6tk.,p].87,f. 10-12. 



Very curious for the firm, granulated, brick-colored scales with 

 which its back is shielded. 



HOLOTHU'RIA (SFNA'PTA) BRIA V REUS, LESUEUR; Joum. 



Nat. Sc., ii. 



This animal, contracted by alcohol, is two inches and a half in 

 length and about one inch in diameter, and is probably three times 

 that size when extended. Its color has a tint of mazareen-blue, 

 and its surface is covered uniformly with minute, tentacular fila- 

 ments, about a twelfth of an inch in length, of a yellowish color. 

 Tentacula eight, very much branched into botryoidal tufts, nearly 

 equal in size. The exterior is firm and strong, and without any 

 flattened disk. 



It agrees pretty well with the description of H. briareus^ but if 

 it should prove different, I have proposed the name Synapta in- 

 tonsa for it. 



CHIRO'DOTA ARENA TA. Body five or six inches long, club- 



shaped, rounded before and 

 diminishing posteriorly, with- 

 out any sudden stricture, till 

 it forms a tube, the last two inches of which is of uniform size, 

 and about the diameter of a crow-quill. The tentacula are eleven 

 in number, short, sub-equal, clove-shaped, terminating in four 

 points which expand into a star, colored like the body ; mouth 

 small ; ovarian papilla adjacent. Surface with five longitudinal 

 furrows, answering to the five internal bands, two of which are 

 shortened so as to give the body a crescentic curve ; circular 

 wrinkles minute and numberless. Color light drab, with straw- 

 colored reflections, apparently naked, but rough with calcareous 

 grains like very fine sand, thickest a little behind the middle. 



This curious animal has been frequently found upon Chelsea 

 beach, after violent storms. I cannot find that it has been de- 

 scribed. 



