PLATE V. 
Fie. 1.—Bxioop or Guinea-pia (Havana, 1879); magnified 
1450 diameters by Zeiss’s one-eighteenth-inch homogeneous immer- 
sion objective, and Tolles’s amplifier; spread and dried on glass 
cover; heliostat. 
Fig. 2. — Bioop or Picvon (Havana, 1879); magnified 1450 
diameters by Zeiss’s one-eighteenth-inch objective, and Tolles’s am- 
plifier; spread and dried on glass cover; heliostat. 
