THE SESSILE CORYNE. 209 



slender, club-shaped, transparent, colourless except 

 near the extremity where the core is dark red. The 

 surface is much wrinkled transversely, and there is a 

 very distinct polygonal reticulation, as if of cells, 

 visible, beneath the integument, since it is not in the 

 same focus as the wrinkles. The tentacles are very 

 numerous, (I counted forty-five on one head, and 

 there were probably some unseen,) shaped as in the 

 larger species, with which their structure agrees, with 

 a hyaline wrinkled neck enlarging abruptly into a 

 globular yellowish head ; they are arranged in about 

 six whorls, and stand out just as in the other species. 

 They are greatly smaller than those of ramosa, as is 

 the whole polype, but especially the tentacles, their 

 diameter not being more than one-fourth that of the 

 tentacles of C. ramosa. I see no capsules on any 

 head. (Fig. 1.) 



Several of these polypes were standing up, not very 

 near together, from a crust of Lepralia (on the stone 

 just mentioned as chiselled from a rock-pool at Cap- 

 stone) close around the base of a cluster of Cellularia 

 aviciilaria. On very carefully separating one from 

 its root, I found that the creeping stem was very 

 small, not more than one-fourth the length of the 

 free polype ; it appeared to consist of a horny trans- 

 parent tube not distinguishable from the integuments 

 of the polype, with which it was evidently continuous. 

 If the animal is young, is the encasing tube not 

 formed until some advance is made to maturity ? 



Another specimen, sessile on the Lepralia without 

 any apparent creeping stem, was much taller and 

 more slender, apparently by voluntary elongation. 



