﻿April, 1357.] 



ELLIOTT SOCIETY. 



203 



the branchlet which they terminate. Ihave seen only one or two 

 of them, all of which were dry and empty. 



This species is, probably, distinct from the European, but I have 

 no specimens of that species with which to compare it, and the en- 

 tire absence in Johnston's drawings of the two tubular processes at 

 the anterior end of each joint, and which 1 have found in all the 

 three species here described, show that these drawings cannot be 

 relied on for so minute a comparison. 



'The main stems are of a yellowish, horny brown, the branchlets 

 lighter in color, and the tips of the branches have a vivid, somewhat 

 golden yellow color. The whole becomes very dark, almost black, 

 by exposure and desiccation, with the exception of the polyp-cells, 

 which retain great transparency. The coloration, at the tips of the 

 branches, appears to be due to the fleshy pulp and the polyps them- 

 selves, not to the polypidom. 



Found from time to time, winter and summer, thrown up on the 

 beach on Sullivan's Island. A beautiful tuft of this species is in 

 the Museum of the College of Charleston, taken by Prof. Holmes 

 at one of the wharves of the city. 



AGLAOPHENIA TRICTJSPIS. nov. spec. 



This species grows in solitary plumes, much taller than those of 

 A. pelasgica and shorter than those A. cristata. The plumes also 

 are of broader expanse than in the latter species and the individual 

 polyp-cells are quite different. The three cusps which are placed, 

 as in the species mentioned, are proportionately long and slender, 

 or, which is the same thing, the polyp cell between them is quite 

 shallow, and its rim, instead of appearing distinct from the single 

 cusp behind it, appears to be united with it as with the others. I 

 have also been unable to distinguish any denticulations on the 

 rim, and these are quite conspicuous in the other two species. 



The prolific vesicles of this species are as yet unknown. This 

 species was found growing just below dead low water mark, on 

 the submerged rocks of one of the upper jetties of Sullivan's 

 Island. It was taken in midsummer. 



* * Polyp-cells of one kind, only more or less tabular or flash-shaped, being generally 

 contracted at the mouth. 



DYNAMENA, de Blainville. 

 The polypidom consists, usually, of a creeping stem which gives 

 off short branches, on which the polyps are opposite and in pairs ; 



