H. B. Fantham 381 
also in 0. francisci and 0. buetschlii, wherein schizonts containing about 
ten nuclei may be seen. 
The phenomena of nuclear division in the gametocytes (“gamontes”) 
during association (Fig. 4, C) are most interesting and significant. 
The single nucleus of the young globular gametocyte divides into 
two, giving rise to a “germinative nucleus” and a “somatic nucleus” 
Fig. 4. Ophryocystis, various species, after L6ger (1907). 
A. 0. hagenmtielleri. Mycetoid schizont (a) at the beginning of schizogony. 
( b) Merozoite, already somewhat grown. 
B. 0. schneideri. Gregarinoid gametocytes, with single nucleus, still attached to 
the epithelium of the host. 
C. 0. hessei. Gametocytes in association. 
D. 0. mesnili. Gametes in conjugation, nr = reduction nucleus, ns = somatic 
nucleus, ng = sexual nucleus (pronucleus). 
E. 0. mesnili. Zygote, with pronuclei still distinct. 
F. 0. schneideri. Cyst with ripe sporocyst. Falciform sporozoites represented 
inside. 
G. 0. schneideri. Transverse section of sporocyst showing octozoie spores. 
