804 E. A. MINCHIN. 
List or REFERENCES. 
Prowazek, S. v.—‘Studien iiber Siugetier-Trypanosomen,” i, ‘Arb. 
k. Gesundheitsamte,’ xxii, pp. 351-395, pls. i-vi, four text-figs. 
(1905). 
Salvin-Moore, J. E., and Breinl, A.—‘* The Cytology of the Trypano- 
somes,’ ‘Ann. Trop. Med. Parasitol.,’ i, pp. 441-480, pls. xxxviii- 
xlii (1907). 
and Hindle, E.—* The Life-History of Trypanosoma 
lewisi,” ibid., ii, pp. 197-220, pls. ii-v (1908). 
Schaudinn, F.—“ Studien itiber Krankheitserregende Protozoen : ii, 
Plasmodium vivax,” ‘Arb. k. Gesundheitsamte,’ xix, pp. 
169-250, pls. iv—vi (1902). 
—— “Generations- und Wirtswechsel bei Trypanosoma und 
Spirochete,” ibid., xx, pp. 387-439, twenty text-figs. (1904). 
EXPLANATION OF PLATES 21-23, 
Illustrating Mr. EK. A. Minchin’s paper on “'l'he Structure 
of ‘l'rypanosoma lewisi in Relation to Microscopical 
Technique.” 
All the figures represent preparations of Trypanosoma lewisi, 
drawn with the camera lucida at a magnification of 3000 diameters (see 
p. 760). 
In order to facilitate the comparison of the results obtained by 
different methods, the figures may be best classified by the dates on 
which the trypanosomes represented were preserved. All those of 
a given date were from the same blood, preserved or stained by various 
methods. 
February 24th.—PIl. 21, figs. 14, 15, 19-22, 39; Pl. 22, figs. 60, 61, 
70, 73, 80, 81). (The preparations of this date were made on slides ; all 
others, except fig. 74, were made on coverslips.) 
March 5th.—PIl. 21, figs. 9-13, 36, 37; Pl. 22, figs. 62-69. 
March 16th.—PI. 21, figs. 23, 24, 40-53. 
March 20th.—PI. 21, figs. 25-34, 54-59; Pl. 22, fi 
March 27th.—PIl. 21, figs. 17, 18, 38; Pl. 22; fig. 
March 30th.—PI. 23, figs. 82-84, 88-91. 
April 3rd.—PIl. 23, figs. 85-87. 
April 6th.—PI. 21, figs. 1-8, 16, 35; Pl. 22, figs. 
5-78. 
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