— 17 — 



summit of 0.7 cm., while one of the grouped individuals measured 2.8 

 cm. in height with a summit diameter of 0.5-0.7 cm. In both cases 

 the contraction was not quite complete, although the margin wàs 

 turned in so as to conceal the tentacles. 



The sphincter was well developed, having the appearance showii 

 in Fig. 3, and in this region of the column there is a number of sphe- 

 rical cavities arranged in a single layer immediately below the ecto- 

 dérm. These cavities also occur lower down, as is shown in Fig. 4, 

 wqich represents a portion of a transverse section of the column wall 

 some distance below the level of the stomatodaeum, but they are much 

 less numerous here and are arranged for the most part singly and at 

 considerable intervals. They differ from lacunae, which are also present 

 by being devoid of contents. The mesenteries were fortj r -nine in 

 number and were very thin in the region below the stomatodaeum 

 from which my sections were made, and although they were somewhat 

 enlarged toward their insertion into the column Wall, the basai canal 

 was not always present. When it was recognizable it had the form 

 of a narrow elongated cavity. 



In its general form, si/e and number of tentacles (mesenteries) the 

 polyps agree sufiìeiently well with Lesueur's Solandrì to warrant the 

 belief that Duchassaing and Michelotti's identification of it was cor- 

 rect. 



Zoanthus Anduzii (Duch. Mieli.) 

 Two colonies of this form were found in the collection and were 

 labelled Mammillifera Anduzii St. Thomas on both the Duchassaing 

 and De Filippi labels. Both colonies consisted of se veral polyps ari sing 



from a fiat membrane-like expansion of 



coenenchyme. In mie colony several of 



the polyps were partly expanded and 



these measured 1.7 cm. in height; some 



of the smaller contracted individuals, 



however, did noi exceed 0.3 cm. in height, 



although the diameter of ali was about 



0.6-0.7 cm. In the second colony there 



were even shorter polyps ; the largest 



Flg - 5 measured 1. 2 cm. in height and had a 



diameter of 0,5 - 0.6 cm. 



In forni the polyps were alinosi cylindrical, resembling closely 



those fìgured by Duchassaing and Michelotti (1860. PI. Vili, Fig. 11). 



My preparatimi* showing the sphincter bave unfortunately become 



spoiled and I cannot give any details concerning its l'orni, except to 



say that it resembled greatly that of Z. Solandri, which form Anduzii 



also resembles in the possession of a large number of scattered, more 



