BRITISH ZOOPHYTES. 183 



attached, the root-band being a cylinder of the same 

 diameter as the column of the polyp. 



This is a small species, the several polyps being 

 connected by an incrusting fleshy root-band. When 

 contracted the polyps resemble split peas. 



The tentacles number 28, in two equal rows. The 

 epidermis is invested with fine sand, of colours varying 

 with the locality. 



The ccBuenchyma is very sensitive, and any irritation 

 is communicated to the colony. 



Mr. Gray (Proc. Zool. Soc, 1867, 233—240) proposes 

 the genus Carolia for var. (a), and the genus Epizoan- 

 thus for var. (b). Dr. Andres considers all the forms 

 described as forming variety Gouclui of this species. 



2. P. SULCATA, Gosse. 



Zoanthus sulcatus (P. H. G.). 



Hab. : Torbay. Height 5 in. 



Colour. Olive, owing to presence of pigment 

 granules. 



This exceedingly minute species was found by Mr, 

 Gosse to the number of 60 in a space of Ig in. square. 

 The epidermis contains a few sand grains, but not so 

 as to be conspicuous, as in the preceding species. 



Genus II. Zoanthds, Cuvier. 

 As last genus, but without sand incrustations. 

 1. Z. Alderi, Gosse. 



Hab. : CuUercoats (Aid.). Height ^ in. 

 Colour. Milk-white. 



In this species the polyps are set in single file, and 

 are free from all sand incrustations. 



Pull details are wanting as to nature of tentacles, &c. 



