Stuckey. — A Review of the New Zealand Actiniaria. 



379 



are in two cycles, 8 in each, those of the outer cycle corresponding to the 

 white lines, those of the inner cycle to the interspaces. The tentacles are 

 transparent, yellowish-brown in colour. Cross-sections show that there are 8 



,,Ol'^"'r 



fnoloderm -^\S 



Mesoff/oe a 



rct0^.rrr, WMm 



\\M\^ — £ndocJerm 

 ^^^Sr — Mesoj/<x.a. 



[ M^^^^TiT yVeryous /oyer 



£atoderm { ^^^ Sp,/-heha./ /aye' 



Fig. 4. 



Pig. 3. 



mesenteries which reach the stomodseum above, and are short and dendri- 

 form below, as shown in the sketch (fig. 3). There is nothing unusual in the 

 histological structure of the body-wall. The ectoderm is thick, the meso- 

 gloea thin and homogeneous. The endoderm is thicker than the mesogloea, 

 but not so thick as the ectoderm. In cross-sections of the tentacles the 



most noteworthy feature is the nervous 

 layer, which is well developed, and 

 reticular in form, with long processes 

 running to the muscular layer, appa- 

 rently one process passing between 

 each of the mesogloeal folds carrying 

 the muscle (fig. 4). It was not pos- 

 sible to locate the position of the re- 

 productive organs in my specimens, but in all that were sectioned there were 

 masses of ova in almost all parts of the body, including the stomodaeum 

 (Plate XXII, figs. 1 and 2). 



Distribution. — Of the genus — almost cosmopolitan. Of the species — 

 Island Bay, Ohiro Bay. 



2. Edwardsia ignota (sp. nov.). 



The body is of the usual Edwardsian type, the physa, however, being 

 rather reduced. The colour is a dirty white or light grey. The capitulum 

 bears 8 light-brown lines. The tentacles are 8 in number, short and blunt. 

 The disc is flattened and the mouth prominent. The scapus is naked, and 

 the physa thin and rounded at the extremity. The animal collapsed when 

 taken out of the water, but the capitulum was not introverted. Only one 

 specimen was found, and on coming to section it I discovered that the body 

 was full of sand, so that it was impossible to obtain any sections. 



Distribution of the S'pecies. — -Island Bay. 



