Notes on Fresh-iuater Ciliate Protozoa of India. 259 



them. Eegarding measurements of size, the terms very small, 

 small, of medium size, large, and very large are used for dimen- 

 sions as defined by Schewiakoff. The writer has recorded his own 

 measurements only where they differ markedly from those usually 

 iriven. 



HOLOTRICHA. 



Family Holopheyina Perty. 

 Genus Spathidium Dujard. 

 Spathidium spathula 0. F. Miill, var. moniliforme var. nov. 



Found in large numbers in stagnant water from a drain (Septem- 

 ber). The animals may be referred to Spathidium s'pathula 

 0. F. Mull., inasmuch as the body is flask-shaped, flexible, though 

 not very contractile, the anterior end narrower than the middle of 

 the body, obliquely truncate, and occupied almost completely by 

 the narrow and elongated slit-like mouth. The margins of the 

 oral portion are padded. The general surface of the body appears 

 to be striate. The cytoplasm is granular, the anterior portion of 

 the body being somewhat clearer. The contractile vacuole is single 

 and situated near the posterior end. The ciliation is uniform, 

 except that the cilia rouod the anterior end are slightly longer. 

 The movements of the animal are slow, the anterior part of the 

 body occasionally bending slightly. 



The form met with however differed from the type in its very 

 much smaller size and the character of the nucleus. The animals 

 measured lOS/x by 20yLt, instead of the usual size, which is men- 

 tioned as 180-240 yLt. The macronucleus consists of a long chain of 

 small beads, and is bent upon itself. In the generic characters 

 given in Biitschli {6) the nucleus is said to be round to elongated 

 and rosary- shaped, but in the figure of S. spathula is shown as 

 consisting of three large beads only. E. Andre {3) has described 

 under the name of >S'. spathula var. plurinudeata a form contain- 

 ing a large number of separate rounded nuclei. The present form 

 differs from the latter in that these small nuclei are not regularly 

 scattered but are parts of an elongated rosary, which is bent upon 

 itself. Hence the form may be said to belong to a new variety, 

 for which the name var. moniliforme is proposed. 



Genus Prorodon Ehrbg. 

 Prorodon teres Ehrbg. 



Specimens of this form were found in great abundance in a 

 collection ot rain-water which had been standing for less than a 



s 2 



