FIG. 45. Copidosoma (Litomastix) truncatellus. A. Oocyte showing 

 germinal vesicle (g.v) containing a chromatin-nucleolus (c.n) and a 

 plasmosome (p). B. Egg a few minutes after deposition showing 

 first maturation spindle (m.s) and " Nucleolo" (AD. C. Egg about 

 one hour after deposition, showing three polar bodies (p.b), the 

 first cleavage nucleus and the " Nucleolo." D. Egg in two-cell 

 stage, about one and one-half hours old. p.n = polar nucleus. 

 E. Four-cell stage. F. Egg about four and one-half hours old 

 showing two polar nuclei dividing, two embryonic cells containing 

 nucleolar substance, and six embryonic cells (dividing) without 

 nucleolar substance. (From Silvestri, 1906.) (147) 



