A. E. Verrill — Anthozoa and Hydrozoa of the Bermudas. 565 



face covered with a firm coat of fine sand. In partial expansion, the 

 summit becomes considerably swollen or turbinate ; in full expan- 

 sion, broad saucer-shaped. Tentacles about 52 to 56 or more, short, 

 subequal, with half as many marginal denticles. 



Color buff or light ochre to dark ochre ; disk dull orange or 

 brownish yellow, usually marked with radial lines and specks of 

 white ; tentacles dull orange, often tipped with white ; marginal 

 denticles, flake-white. 



Height of zooids, 15 to 20™™; diameter in contraction, 10 to 13™""; 

 disk, in expansion, 14 to ]6'""\ 



This species has larger zooids and much more numerous tentacles 

 than any hitherto described. 



It is probably the species described as Corticifera ocellata by 

 McMurrich (Bermuda Is., p. 127), but not the original ocellata. 



As additional species of West Indian Zoanthi are likely to occur 

 at the Bermudas, I add, for convenience, the following analytical 

 table, based chiefly on the external characters given in the original 

 figures and descriptions, but supplemented in some cases by the 

 observations of later writers (as indicated), and by personal studies. 

 Valuable diagnostic characters are undoubtedly to be derived from 

 anatomical and histological studies, especially from the character of 

 the sphincter muscles and the musculature of the mesenteries. But 

 at present only a few species have been studied in these respects and 

 some of those that have been thus studied have evidently been 

 erroneously identified, so that these characters cannot be used advan- 

 tageously in this table. Moreover the individual variations in their 

 anatomy, known to be great, have not been sufticiently investigated 

 in any species. The size and form of the sphincter muscles vary 

 according to the degree of contraction and mode of preservation. 

 For such characters reference should be had to the plates of McMur- 

 rich and of Duerden. The number of tentacles is equal to that of 

 the mesenteries, but as the latter are added by pairs, bilaterally, 

 next the directives, the number varies considerably, even in polyps 

 that seem adult.* 



I do not pretend to vouch for the specific distinctness of all the 

 nominal species included in this table, but they are the forms 

 usually regarded as distinct. 



* This mode of increase and the bilateral arrangement of the mesenteries was first 

 definitely described by the present writer in these Transactions, vol. i, pp. 495, 496, 

 1869, as characteristic of the entire family. Leseur had figured them correctly as 

 early as 1817. Probably the number of perfect mesenteries will be found more con- 

 stant than the total number, but this has seldom been given by writers on this group. 



