32 Tatem, on a New Species of Microscopic Animals. 



habitat. I strongly incline to that belief, and am to a certain 

 extent confirmed in it by the fact of a Basticella (unmis- 

 takably B. convallaria) , considered as exclusively a fresh- 

 water infusorium, being the constant companion of this Epis- 

 tylis, and both sufficiently abundant on filamentous algae in 

 the rock-pools of our south-eastern coast. Until its specific 

 identity with some one of our fresh-water Epistylideae is cer- 

 tainly determined, it may be provisionally named Epistylis 

 marinus. 



I. Epistylis marinus (Fig. 6) . — The zooids, never more than 

 two, are small, ^~-^, pyriform, colourless ; vacuoles numerous ; 

 main stem robust; branchlets comparatively slender, smooth. 

 On filamentous algfe. 



II. Epistylis ovalis, n. sp. (Fig. T). — Zooids two, small, -^-q , 

 colourless, oval, with a contracted raised margin or lip ; main 

 stem and branchlets long, slender, and of equal thickness. 

 Very rare. On Anachasis. 



III. Epistylis umbellatus , n.sp. (Fig. 5). — It is seldom indeed 

 that so perfect an example of this elegant form of Epistylis as 

 that figured is met with ; commonly the stalk, with some 

 eight or sixteen zooids, more commonly the bare stalk, is 

 alone obtainable. So far as I am yet aware, it is found in one 

 ditch only, near the wire mills on the Kennet river, near 

 this town (Reading). The zooids, which easily become de- 

 tached, are minute, oval, colourless ; main stem very long, 

 slender, dividing into four branchlets, which again subdivide 

 into four each, in an umbellate manner, smooth, and of a 

 light horn colour. 



IV. Canomorpha convolutas, n. sp. (Fig 1). — Whether the 

 creature I figure is a more advanced stage of the Canomorpha 

 mecfwsM/a described at p. 597 of Pritchard's Infusoria,' a new 

 species of Caenomorpha, or the type of a new genus, I leave 

 to other and authoritative decision. Certainly it differs widely 

 from the only known species of Caenomorpha. 



The body is colourless, smooth, conical, with the apex 

 somewhat curved downwards, its general outline being that 

 of a Phrygian cap, fringed at the edge with a closely set row 

 of long cilia. Twelve to twenty long and stout setae spring 

 from the under side, and these enable the animal to rest upon 

 and creep over the surface of the weeds. One large vacuole 

 has been observed, but no contractile vesicle. The tail, which 

 has a swollen base, encircled by cilia, is not centrical ; it is 

 long, tapering to a fine point, and slightly curved upwards, 

 sometimes, but not commonly, bifid. The vortex raised by 

 ciliary action is considerable, the current flowing through the 

 channel on the under side and circulating around the base ; 



