Qi C. CLIFFORD DOBELL, 
Fig. 31.—Living animal, moving slowly—axostyles parallel. 
Figs. 32-35.—Various small forms, showing different forms of 
nucleus, ete. (Zeiss 15 mm. apo. oil-imm., comp. oc. 12.) 
Figs. 36, 37.—Degenerate forms. 
Fig. 38.—Encysted Octomitus. 
Fig. 39.—Individual moving about rapidly inside cyst. Drawn just 
before emerging. 
Figs. 40, 41.—Probably represent stages in division. 
Fig. 42.—Bodo sp. form feces of Bufo vulgaris. 
Fig. 43.—Another individual, amceboid at hind end, 
Fig. 44.—Extremely minute Bodo individual. 
Fig. 45.—Cyst containing four organisms—probably Bodos. 
Fig. 46.—A six-flagellate organism from feces of Bufo. (Zeiss 3mm. 
apo. oil-imm., comp. oc. 12.) 
Fig. 47.—Minute uniflagellate monads from feeces of toad. 
Fig. 48.—Two three-flagellate monads, also from feces of toad. 
Figs. 49, 50.—M onocercomonas bufonis—wide and narrow forms. 
(Zeiss 2 mm. apo. oil-imm., comp. oc. 12.) 
Fig. 51.—Cyst of Nyctotherus cordiformis. (The pale, sausage- 
shaped structure is the nucleus; the smaller, light area, above to the 
left, is a vacuole. Below this is to be seen the rather faint outline of 
the mouth and gullet.) 
PLATE 4. 
{All drawings, unless otherwise stated, are made from permanent 
preparations, fixed with sublimate-alcohol, and stained with Delafield’s 
hematoxylin. Drawings made (unless stated to the contrary) under 
Zeiss 3 mm. apochromatic homog, oil-immersion (1°40), comp. oc. 12. ] 
Figs. 52-79.—_Entameba ranarum. 
Fig. 52.—Large vegetative individual. Living animal. The nucleus 
is seen as a very distinct ring-like (in optical section) structure, with a 
beaded appearance, lying near the centre, surrounded by food masses. 
(2°5 mm. apo. water-imm. [Zeiss] x c. oc. 12.) 
Fig. 53.—Ordinary individual. The typical appearance of the 
nucleus in a stained specimen is well seen. 
Fig. 54.—Smallest kind of ameba found, with characteristic nucleus 
containing a small karyosome. (Formalin 40 per cent., Heidenhain 
iron-hematox.) 
