ZOOLOGY OF THE BERMUDAS. 113 



ish-brown, similar to what is frequently seen in preserved 

 ActininaD, while the upper part of the column and the fronds 

 are of a grass-green, the tentacles resembling somewhat the 

 lower part of the column, but having a distinctly greenish tinge. 



The column is provided in its upper part with about 48 ver- 

 tical series of tubercles, probably verruca3, there being about 

 five or six in each series, and is thrown into numerous trans- 

 verse folds, the result of contraction. The mesoglcea, when 

 exposed, appears to be raised into numerous minute elevations, 

 whereby the surface acquires a finely punctured appearance. 



The tentacles are moderately long, simple and pointed at the 

 extremity. They appear to be arranged in two cycles, and 

 from a necessarily uncertain count I estimate their number to 

 be about forty-eight. Their ectodermal longitudinal muscle 

 layer is well developed, being arranged on long slender 

 mesogloeal processes. The fronds (PI. 10, fig. 5, fr.) are small, 

 yet occupy the entire width of the area between the tentacles 

 and the apparent margin. They consist of hollow evagina- 

 tions of the disc, arranged in bunches. I could not determine 

 with certainty their number in any of the specimens, but there 

 are probably twenty-four of them in all. A well-defined mar- 

 gin is present. 



Immediately external to the bases of the tentacles, and lying 

 between them and the fronds there is an endodermal sphincter 

 (sp) fairly well developed. Immediately external to it, in the 

 region occupied by the fronds, and for a slight distance down 

 the column-wall below the margin, there are no muscle proc- 

 esses, but further down they do occur, forming what might be 

 termed a second sphincter, though it is by no means well 

 developed. The surface of the disc between the tentacles and 

 the mouth is deeply depressed, so that a fosse is formed around 

 the peristome. The mouth is large. Sections show that over 

 the general surface of the stomatodamm the mesoglcea is very 

 thin, and upon the ectodermal surface gives rise to numerous 

 more or less regularly arranged fine processes, over which the 

 ectoderm passes so as to be thrown into numerous folds. The 



