YOPHYLLIACEA. 
ZOANTHID.E. 
THE MTHNKLED CREEPLET. 
Zoanthus Alderi. 
(Sp. nov.) 
Plate IX. Fig. 8. 
Specific Character. Polypes free from sand ; set in single file, obconic, 
transversely wrinkled. 
GENERAL DESCRIPTION. 
Form. 
Basal band. Narrow, smooth, irregularly branching, free from sand. 
Column. Inversely conical, the summit being two or more times as 
broad as the base ; summit (in the button state) swelling, flat, depressed 
in the centre, with many (about twenty ?) radiating stinee, indicating the 
marginal teeth. Surface smooth, without any investment of sand, but 
marked throughout with close-set transverse or annular wrinkles. 
Disk and Tentacles. Unknown. 
COLOCR. 
Basal hand and column. Opaque milk-white. 
Size. 
Height of column about two lines ; gi’eatest diameter about half a line. 
Locality. 
Noi-thumberland: on a stone, at extreme low- water. 
The slight acquaintance that I possess witli this species 
I owe to !Mr. Joshua Alder, who has sent me a drawing 
and description of a specimen found by him at Cullercoats, 
X 
