368 MR. J,. M. BROWN ON FRESHWATER RIIIZOPODS. 



1882. Taranek, K. J. — " Monographie der Nebeliden Bohmens,'^ in 



AbhanJ. der k(3n. Bohm. Gesell. Wiss. (6) xi. 

 1901. West, G. S. — " On some British Freshwater Rhizopods and Heliozoa," 



in Journ. Linn. Soc, Zool. xxviii. 



Zoological Laboratory, 

 University of Slieffield. 



EXPLANATION OF PLATE 50. 



Figs. 1 & 2. Avioiba vespertilio, Penard. X 600. Active individuals. '«. = nLicleus, c.v.= 



contractile vacuoles, i;flc. = vacuoles. 

 Fio's. 3-5. Difflitgia rubesce^is, Penard. x 400. Fig. 3 is a surface view of the test. Fig. 4 



is an optical section of an individual retracted. Fig. 5 is the same of an active 



individual. ?z. = nucleus, c.2;. = contractile vacuole, r.^. = red granules. 

 Figs. Q-^. Difflugia oviformis, Cash. X 400. Figs. .6 & 7 are different views of typical 



examples. Fig. 8 shows an individual with a somewhat irregularly 5-lobed 



moutli. 

 Figs. 9 & 10. Nehela militaiis, var. tuhulata, var. nov. X 600. Fig. 9 is the broad view 



and iig. 10 the narrow view of an empty test. 

 Fiffs. 1 1 & 12. Euglypha compressa, Carter. Fig. 11 shows a portion of an individual with 



mouth-plates («) and spines (b) of the daughter animal. X 600. Fig. 12 shows 



the spines of a typical individual. X 1000. 

 Fi2'. 13. Corythion dubium, Taranek. X 1000. Surface view of an empty test. Fig. 13 « 



shows the arrangement of the plates. 

 Fif-^s. 14 & 15. Pcndinella chromatophora, Lauterborn. x 1000. Fig. 14 is an empty test 



in ^ide view. Fig-. 15 is the same seen from the oral end. 



