JOURNAL 



OF THE 



ROYAL MICROSCOPICAL SOCIETY. 



JUNE, 1913. 



TRANSACTIONS OF THE SOCIETY. 



VI. — Smith American Rotifera. 



By James Murray, E.R.S.E. 

 (Naturalist attached to the Bolivian Boundary Commission, 1911-1913.) 



{Read March 19, 1913.) 

 Plates IX and X, 



Introduction. 



In the years 1911-1912, I had the opportunity to study the 

 Eotifera in most of the countries of South America, from the 

 Tropics to the Straits of Magellan, A report on those of Bolivia 

 and Peru has appeared elsewhere {2Jf)* 



This paper deals with the Eotifera of Brazil, Chile, and Argen- 

 tina, and contains additional notes on those of Bolivia, Peru, and 

 British Guiana. A summary will be given of all that is known 



* The figures in brackets refer to the Bibliography at the end of the paper. 



EXPLANATION OF PLATE IX. 



Fig. la.—PJiilodina vcrrax, variety. Outline, showing barrel-like 



swelling. 

 16. Ditto. Head. 



Ic-ld. Ditto. Spurs in two different positions. 

 2a. — Habrotrocha fusca. Optical section of neck, showing 



thickenings. 

 2b. Ditto. Lateral view of neck. 

 3. — Callidma pacifica. Fully extended, creeping. 

 4a. — Habrotrocha cuneata sp. n. Feeding, with foot hiddeu. 

 46. Ditto. Rump and foot. 

 4 c. Ditto. Jaw. 

 4d. Ditto. Spurs. 



Jmie. 18th, 1913 R 



