1887.] MICROSCOPICAL JOURNAL. 3 
attention to them, the parasites themselves being very transparent. The 
observation of the movements of the filaments is aided by use of the hot stage 
at a temperature of 37°-38° C. 
The parasitic elements of Laveran present themselves under several forms, 
viz :—No. 1. Cylindrical elements having pointed or rounded extremities, 
Prats 1.—Malarial Germ of Laveran. 
crescentic curve pigmented toward the centre. Length about 8 or 9, diameter 
about 3. Contour generally a single line, but in some preparations double, 
transparent colorless except the pigment bodies. The body may be attached 
to a corpuscle, but not very closely, and adhesion seems to be purely accidental. 
Besides the crescent-shaped bodies certain oval forms are found intermediate 
between the crescent-shaped and the round bodies, and the granules in these 
are placed in the form of a crown. ‘These bodies are far less frequent in the 
blood than body number 2. 
PLATE 1.—GERM OF LAVERAN. 
Fig. 1.—Section of brain showing blood-vessel containing affected corpuscles, stained with methyl blue, from 
a case of ‘ comatose pernicious fever.” 
Figs. 2, 3.— Bodies No. 1 with pointed extremities ; 4. Body No. 1 attached to red blood-corpuscle; 6. Oval 
body intermediate between Fig. 2 and Fig. 3. (Magnified about 1000 diameters). 
Fig. 7.—Body No. 2, of average volume ; 8. Body No. 2 enclosing mobile pigment granules ; 9. Body No. 2 
in which a double contour may be distinguished; xo. Bodies No. 2 of small size, free and isolated; 11. Bodies 
No. 2 of small size, aggregated ; 12, 13, 14, 15, red blood-corpuscles to which are attached the bodies No. 2 of 
small size to the number of one, two, three, and four; 16. A red blood-corpuscle to which is attached a body 
No. 2 of average size ; the corpuscle is very pale. (X 1000 diameters). 
Fig. 17-28.—Changes in form of a single plasmodiuin included in a red blood-corpuscle within a period of about 
fifteen minutes. 
Fig. 30.—Motionless plasmodium emerging from a red blood-corpuscle, blood taken after the paroxysm of fever 
and administration of quinine. (From latest paper of Marchiafava and Celli, Dec. 15, 1885). 
Fig. 32.—Body No. 2 with three mobile filaments, seen Dec. 1, 1880, 3 P. M.; 33. Same at 3.15 P, M.; 34. 
Same at 3.30; 35. Same at 3.35; 36. Same at 8.30 A. M., Dec. 2, 1880. (x 1000 diameters), 
