Protozoa and Rotifera at Havana, III. 341 



Tokophrya quadripartite was found common in company 

 with this species, as was also a small Opercularia, which may 

 prove to be only a variety of irritabilis. The zooicls of this 

 small form measured .08 mm. in length and .042 mm. in 

 width, but otherwise seem to agree with those of irritabilis. 



COTHURNIA EHRBG. 



Animal similar to Epistylis, but more elongate ; contained 

 in a lorica which is subcylindrical, of variously modified 

 shapes, often expanded at middle and narrowed near the 

 opening, attached posteriorly, either directly or by a short 

 pedicel ; sometimes closed when the animal is retracted 

 within it. Nucleus elongate, band-like. 



89. C. curva Stein. 



Found upon Urnatella gracilis in July, in bottom towings 

 from the river at E. 



Vaginicola Lam. 



Animal similar to that of Cothurnia ; lorica sac-like, nar- 

 rowed at the opening, attached lengthwise by the ventral 

 surface and flattened, the opening turned upwards. 



90. V. gigantea D'Udek. 



A few individuals were found in September among vegeta- 

 tion in Thompson's Lake. 



Subclass SUCTOKIA. 



Family ACINETID^E. 



Tokophrya Butschli. 



Solitary, not loricated, globose to elongate, attached pos- 

 teriorly by a rigid pedicel ; reproducing by the formation of 

 ciliated embryos within the body of the parent. 



91. T. cyclopum C. & L. 



In May and July a few were found on Cyclop* in towings 

 from Quiver Lake and the river. 



92. T. quadripartita C. & L. 



This was the commonest of the Suctoria in our collections. 



