264 Transactions of the 



posteriorly, pointed anteriorly, not rostrate, and bearing two flexible 

 attenuate vibratile flagella. Length of lorica ^V mm., diameter 

 T^TT mm. ; body occupying about one-half of its internal cavity. 



Hab. Fresh water, attached to Conferva. Stoke Newington, 

 London, W. S. K. 



Bicos8sca inelinata, n. sp., PI. CV., Fig. 18. 



Lorica ovate, set obHquely on a slender pedicle of twice its 

 length. Body occupying two-thirds of the cavity of the lorica, 

 flagellum single. Length of lorica ^V mm., greatest diameter 

 rU mm. 



Hab. Fresh water, attached to Conferva. Stoke Newington, 

 London, W. S. K. 



ANTHOPHYSA, Duj. (revised). 



Animalcules pyriform, obliquely truncate anteriorly and fur- 

 nished with two flagelliform appendages, attached singly or in 

 clusters to a simple or branching uncontractile stem. Increasing 

 by longitudinal fission. 



Anihophysa solitaria, Bory, PI. CV., Figs. 19, 20. 



Animalcules grouped in a cluster of forty or fifty at the ex- 

 tremity of a simple flexible thread-hke stalk. Length of bodies 

 j^ mm. 



Hab. Fresh water, on Conferva, <Src. European Continent, 

 Bory and Tresenius. Stoke Newington, London, W. S. K. 



Anihojpliysa laxa, n. sp., PI. CV., Fig. 21. 



Animalcules disposed singly, excepting during fission, at the 

 extremities of a loosely and irregularly branching flexible stalk. 

 Length of bodies -ys^ mm. 



Hab. Fresh water, on Conferva. Stoke Newington, London, 

 W. S. K. 



Anthophysa Bennettii, n. sp. 



Animalcules stationed singly or in pairs (during fission) at the 

 extremities of a slender, rigid, and repeatedly dichotomously dividing 

 stalk. Length of bodies -^^ mm., of the branching stalk 1 mm. 

 and upwards. 



Hab. Fresh water, attached to Conferva. Stoke Newington, 

 London, W. S. K. 



Monas termo, Ehr. 



Having encountered the attached form referred to this species 

 by Prof, James Clark, I difier from him in his assumption that 



