THE SAND PINTLET. 251 



to form an ovate bladder as wide as the diameter of the 

 column. This occurs as well when comfortably ensconced 

 and expanding, as when exhausted by lying out of water. 



Mr. Peach has favoured me with notes of a singular 

 example of the reproduction of organs in this species. A 

 specimen in his possession displayed a transverse cut, 

 apparently the result of accident, which extending almost 

 quite across the column just below the disk, caused the fore 

 part to fall over, hanging only by a fragment of skin. 

 The tentacles, which now of course drooped from the 

 bottom of this hanging part, presently disappeared by 

 absorption, while at the same time from each of the severed 

 surfaces a new disk with new tentacles was developed. 

 Thus the old stump became pretty much as before, only 

 slightly shorter, but the severed piece lost the tentacles at 

 one end, and acquired new ones at the other. 



Halcampa chrysantheUum has been found as yet only in 

 Cornwall, but in the following spots : — 



Fowey, C. W.P. : Gwyllyn Vase, Pennance, &c., W.P. C. 



P. hastata. 



CHRYSAXTHELLUM. 



microps. 

 Edwardsia. 



