212 NOTES ON SAGARTIID^ AND ZOANTHID^E FROM PLYMOUTH. 



Soon after capture several ejected shells of Homalogyra atornus, 

 which is abundant on the rocks there. 



P. expansa thus appears to have a fairly wide range on the western 

 coast, and to be variable in colour and form. 



Epizoanthus couchii, Johnston. 



Zoanthus couchii, Johnston, 1838 ; Gosse, 1860. 

 Epizoanthus couchii, Haddon and Shackelton, 1891. 



A colony dredged on December 6th, 1907, from Duke Eock, Ply- 

 mouth Sound, consisted of fifteen polyps of various sizes attached to 

 a stone. Coenenchyme thin and irregular. The larger polyps 15 mm. 

 in length, gradually widening toward the summit. Encrusted with 

 sand. The lower f of the column was weak, less encrusted than the 

 summit, and incapable of supporting the upper portion. The upper ^ 

 contractile, and this gives these polyps a " knobbed " appearance. If 

 irritated, the whole column stiffened somewhat, but usually lay bent 

 over, the summit resting on the stone. The half-grown polyps all 

 showed more or less narrowing about the base, but those of 2-4 mm. 

 are the same thickness throughout. 



Fresh polyps appear to arise as small mound-like swellings in the 

 coenenchyme. Small isolated individuals were also to be observed on 

 the same stone. 



Disk concave, olive with white lines. Mouth elevated. Lips opaque 

 white. Tentacles 24 to 28, in two cycles, fairly long and transparent. 

 Tips rather blunt and white. Marginal teeth, 12 to 16. In some 

 cases well developed ; in others less so. 



Lives well in confinement ; very timid, contracting at the least 

 vibration. 



Epizoanthus (?) rubicornis (Holdsworth). 



Zoanthus rubicornis, Holdsworth, 1861. 



Epizoanthus (?) riibicornis, Haddon and Shackleton, 1891. 



Haddon and Shackleton (1891), p. 653, say : " This s}»ecies has 

 apparently not been met with since its discovery, and we are unable 

 to do more than recast Holdsworth's description. Wo have no doubt 

 that this species is an Epizoanthus." 



I have examined two preserved colonies, marked " Five miles south- 

 west of Eame Head, September, 1902." 



Colonies unattached. From their conformation they would appear 

 to have lain free on a sandy bottom, the polyps all being bent slightly 

 upward. 



