Protozoa and liotifera at Havana, III. 363 



11. R. macrurus Schrank. 



In June one specimen was found in a surface towing from 

 C, in Quiver Lake. 



12. R. vulgaris Schrank. 



A few were found during July in the surface towings from 

 the river at E. In March it was also found in the oblique 

 towings from the same place. 



13. R. tardus Ehrbg. 



This species was comparatively rare. In June it was found 

 among the vegetation on the west shore of Quiver Lake at C, 

 and in June, September, and October it occurred in the tow- 

 ings from the river at E. 



14. R. neptunius Ehrbg. 



Actinurus neptunius Ehrb"'. 

 This peculiar and interesting form was found in the river 

 at E from May to October, in Matanzas Lake in August, and 

 in Thompson's Lake in September. Although it was not 

 common at any time, still it was persistent during the months 

 mentioned, and was found in both surface and oblique tow- 

 ings. It is rather remarkable that it was not found among 

 the vegetation. 



Philodina Ehrbg. 



Eyes two, placed above the brain. 



15. P. macros tyla Ehrbg. 



Philodina tuberculata (Josse. 

 One specimen of this rotifer was taken in August among 

 the vegetation on the west shore of Quiver Lake, at the 

 mouth of Dogfish Lake. 



16. P. megalotrocha Ehrbg. 



This form was well distributed, being found in Quiver and 

 Phelps lakes and in the river (substations C, F, D, and E). 

 It was taken in surface and oblique towings and among vege- 

 tation. There was hardly a collection made at these substa- 

 tions from June to September in which it did not occur, and 

 it was also found once in October at E. 



