120 ZOOPHYTES. 



Towards the middle of August, a specimen taken in the same gar- 

 den pond which had afforded the Cristatella exhibited to the British Asso- 

 ciation, diffused in ramifications with tolerable regularity, as if originating 

 from a common centre, on a leaf of the Water Plantain. It might have 

 been covered by half-a-crown or little more. — Plate XXXII. fig. 1. 



Here all the boughs and branches, evidently tubular, adhered laterally 

 to the leaf. They were scantily clothed with short cylinders, somewhat 

 as the denticles of the Sertularise, projecting from their upper surface, in- 

 habited by hydra? issuing from the orifice, and retreating completely with- 

 in. Besides the animals in vigour, many were decaying ; and many tubu- 

 lar projections, which had been of earlier formation, were tenantless. — 

 Fig. 2, enlarged. 



A faint green hydra, displaying its lunate head, above a line in diame- 

 ter, provided with about 60 tentacula, and extending above a line from 

 the orifice, belonged to this latter specimen. Buoyant particles in their 

 vicinity were powerfully attracted or repelled, and received by the mouth 

 projecting with a thin lip, susceptible of dilatation as a very shallow fun- 

 nel amidst the tentacula. — Fig. 3. 



Large green ovoidal pellets were discharged by the hydra?. The 

 upper part of the integumentary covering of the body dilates as a circum- 

 ferential edge, from which the closed tentacula issue, to expand the head 

 as a crescent. — Fig. 3. 



Another specimen, or which I rather considered only a portion of 

 one, adhering to the back of a decaying Iris, was taken from the same 

 pond, on September 20, of the preceding year ; together with some more 

 luxuriant than fig. 1. Its hue was much darker than any of the former, 

 contrasting deeply with the pale green hydra? : and here the skeleton and 

 tubular receptacles were strongly defined. But, various fragments being 

 dispersed on the leaf, I cannot affirm what was the general character of 

 its formation, presuming that it might not be entire, fig. 5 ; enlarged, 

 fig. 6 ; hydra, fig. 7. 



The character of the first two described, though not of equal size, 

 tliis not being essential, seemed to correspond in other points. 



The greater portion of the large specimen, found at Fenton Tower, 



