4*72 Verrill, JVotes on Radiata. 



flated tips, those on the sides simple oi* two or three lobed ; those at 

 the margin of the disk elongated, pedunculated, the end divided 

 into 2 to rounded lobes. Tentacles numerous, rather long, the inner 

 ones largest. Disk broad, with a naked area or " fosse " between the 

 tentacles and the margin. 



Cladactls grandis Verriii, sp. nov. 



A large species with the entire surface of the column covered with 

 close vertical rows of crowded, elongated papillae, which are smaller 

 below, but larger and more complex near and at the margin. The 

 uppermost sub-marginal ones arc elevated, with a distinct peduncle, the 

 outer portion divided into about six, rounded, inflated lobes in the 

 larger ones, two to four in the smaller ones. The papillae become 

 nearly sessile below, but many of them have two or three rounded 

 lobes. The tentacles are moderately large, rather stout, very nume- 

 rous (528 in a large one), in many rows, forming seven or eight cycles, 

 apparently but little contractile, separated from the margin of the 

 disk by a broad shallow fosse. Buccal disk broad, radiated. The 

 mouth is large, elongated, with strong gonidial folds, and numerous 

 lobes along the sides. 



General color greenish-brown or olive ; " twelve rows of light col- 

 ored tubercles, with three or more rows of smaller dark ones between 

 each pair of rows of larger ones ; disk dark greenish brown ; tenta- 

 cles of nearly uniform greenish brown." In alcohol the specimens are 

 grayish blue, with dull blue tentacles. Some of the larger specimens, 

 when preserved in alcohol, are about 3 inches in diameter and 2 high ; 

 length of inner tentacles 1 inch. 



Paita ; and Zoi'ritos, Peru ; Pearl Islands ; and Panama, on stones 

 below half-tide mark, — F. H. Bradley. Rio Brito, near San Juan del 

 Sur, Nicaragua, — B. Silliman. 



This species appears to be the most abundant Actinian of the Pan- 

 amian P^'auna in the littoral zone. It occurs under the wharf of the 

 Panama Railroad Co. at Panama. It appears to have limited powers 

 of contraction, since most of the specimens preserved in alcohol have 

 the tentacles more or less extended and the disk exposed. In some 

 cases, however, the disk is so involved as to conceal the tentacles. 

 Mr. Bradley states that it is " very sensitive." 



It appears to be allied to some of the sj^ecies referred to Cystiactis 

 by Edw. and Haime, but the latter group appears to include repre- 

 sentatives of more than one genus. There is, moreover, nothing in 

 their descriptions to indicate that either of their species have com- 

 pound tubercles, which is one of the most prominent characters of the 



