330 
3- Lavkran and Mes.vil. Trypanosomes et Trypanosomiases, p. 374 , p ar j 5 
Masson & Cie. 
4. Dutton and Todd. First report of the Expedition to Senegambia, Memoir 
XI, Liverpool School of Tropical Medicine. 
5. Marchoux and Salimbeni. Un trypanosome nouveau chez une Hyla voisine 
de H. latcristriga. Comptes Rendus de la Societe de Biol. T. LXII,p.591. 
6. Bouet. Culture du Trypanosome de la grenouille. Annales de L’inst. 
Tome XX, No. 7 p. 564, 25 July, 1906. 
7. Broden. Rapport sur les Travaux du I.aboratoire medical de Leopoldville, 
Vol. II, p. 186, Hayez, Bruxelles. 
8 . Moore and Breinl. Note on the life cycle of the parasite of Sleeping Sickness. 
Lancet, May 4, 1907, p. 1,219. 
9. Martin. Sur un trypanosome de Saurien. Comptes Rendus de la Soc. de 
Biol. T. LXII, p. 594. April 13, 1907. 
Drepanidia .* 
I' r csh Preparations. 
Diepanidia were present in every species of frog and toad named 
on page 307, and in almost every frog examined. In the same frog 
{Rana galamensis) in which the developmental changes in 
1 . loncatum were observed, drepanidia were present in almost every 
othei led blood corpuscle, though scarcely any young parasites were 
seen. The red cells were swollen to nearly twice their normal size, 
the colouring matter had disappeared, and the cells in fresh pre¬ 
parations presented the appearance of a crumpled colourless bag, to 
one side of which the parasite lay. The nucleus was pushed to the 
periphery of the cell (Plate XXIX, fig. 86). 
A few of these diepanidia were found free in fresh preparations 
examined immediately after making them, but the number of free 
parasites increased enormously after half an hour. The drepanidia, 
er eaving the cells and becoming free, were long and had a round 
YYVttt rVf' enc * ,n a dvance during progression (Plate 
* /)• A little way from this end the body tapered 
^ 771 °^ pOSterior Which though narrow, was bluntly 
rounded off (Plate XXVIII, figs. 68 and 69). 
Progression takes place in three ways : — 
f ^ ie k ot ty stretched out by a gliding movement. 
when nK \ gI ? arine " Ilke contrac ti°ns of the protoplasm. This occurs 
When Obstruct^ ,s encountered (Plate XXVIII, figs. 7 o and ;.)• 
Di-ovir, / , en Jerkin§: backward of the posterior end which has 
Previ ously curved ro und to meet the anterior end. 
See footnote to page 303. ~ -----— 
