38 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE IV. 

 Boveria subcylindrica, gen. et sp. nov. 



Fig. 32. View of living Boveria subcylindrica; in, moutii; c, cilia of peri- 

 stome; V, contractile vacuole;/, food mass; «i, macronucleus. 

 Z. oc. 3, ob. E, cam. 



Fig. 33. Freehand sketch of a specimen attached and feeding; p, pharynx. 



Fig. 34. Two individuals showing dividing micronuclei (^/2)- Methyl-green- 

 acetic on fresh material. Z. oc. 8, ob. D, cam. 



Fig. 35. Two individuals showing different conditions of the macronucleus 

 («i), found side by side in a preparation of fresh material fixed 

 with T per cent, formalin and stained with picro-carmine. Z. oc. 

 8, ob. D, cam. 



Fig. 36, a-e. A series of specimens fixed with osmic vapor, showing varia- 

 tions in size and form. L. oc. 3, ob. 7, cam. 



Figs. 37-46. Division stages arranged in series, from fresh material fixed on 

 the slide with i per cent, formalin and stained with picro-carmine. 

 Z. oc. 8, ob. D, cam. 



