EXPLANATION OF PLATE VII. 



ACTINIARIA. 



Fig. I. — Metridium schillerianum (Stoliczka). 



Solid transverse section through the lower part of the column. 

 The sulcus and sulculus are shown at the ends of the longer axis of the stotnodaeum. 



Fig. 2. — Phytocoetes chilkaeus, sp. nov. 

 Vertical section of the body-wall in the region of the sphincter, x 75. 



Figs. 3 t 3a, 3b. — Pelocoetes exul (Annandale). 



3. — A living anemone in a contracted state (nat. size), showing the loose colum- 

 nar sheath. 



The figure is from a sketch made ad nat. by Mr. G. M. Henry. 



3<3. — Transverse section of a part of the body-wall in the lower region of the 

 column, x 100. 



36. — Vertical section of the body-wall of a small portion of the muscular (upper) 

 region of the column, x 250. 



Figs. 4, 4a, 4b. — Halianthus limnicola, sp. nov. 



4. — Vertical section of the body-wall in the region of the sphincter (highly 



magnified) . 

 4a. — Transverse section of a mesentery passing through the trilobed region of the 



filament (highly magnified). 

 4Ô. — Transverse section through a male gonad (highly magnified). 



Figs, 5, 5a. ' — Edwardsia tinctrix, sp. nov. 

 5.— A papilla on the column as seen in profile in a specimen mounted in Canada 

 balsam, showing the nematocysts discharging their threads, x 250. 

 5«. — Transverse section of a papilla passing a little to one side of the centre of the 

 lumen, x 250. 



Figs. 1, 2, 3<z, 3e, 4, 4a, 46, and 5 are taken from specimens in which the column-wall was in 

 a state of high contraction. 



Lettering. 

 cm. =circular muscle: ec.=ectoderm: en.=endoderm: i.me.==incomplete mesen- 

 tery: m.=mesogloea : me.=complete mesentery: n.=nervous layer: p.=cavity of 

 papilla: sc. =remains of nematocyst : sp.=sphincter. 



