134 
Loa papionis n. sp. 
Langeron, M. (1916). Precis de Microscopie. Paris. 
Leiper, R. T. (1912). Brit. Med. Journ. i. 39. 
- (1913). Observations on certain Helminths of Man. Trans. Soc. Trop. Med. and 
Hyg. vi. 265. 
Looss, A. (1904). Zur Kenntnis des Baues der Filaria loa Guyot. Zool. Jahrb. Syst. xx. 549. 
Jena. 
- (1914). In Mense’s Handbuch der Tropenkrankheiten, 2nd ed. n. 433. 
Low, G. C. (1911). Filaria loa. Journ. trop. Med. and Hyg. xiv. No. i. 
- (1913). Discussion on Filariasis (Brit. Med. Assoc.). Brit. Med. Journ. Nov. 15. 
Ludwig, H. and Saemisch, Th. (1895). Ueber Filaria loa (Guyot) im Auge des Menschen. 
Zeitschr. f. wiss. Zool. v. 60, Heft 4. 
Manson, Sir P. (1912). Tropical Diseases. London. 
Pappenheim (1908). Panoptische Universalfarbung fiir Blutpraparate. Med. Klin. iv. 1244. 
Penel, R. (1904). Les Filaires du sang de VHomme. These de la Faculte de medecine, Paris. 
Query, L. C. (1918). Un cas de guerison de Filariose (F. loa) chez un syphilitique traite par 
le serum du Dr Query. Communication faite a la Societe de Pathologic comparee, 
Nov. 12. 
- (1919). La Syphilis. Microbiologie: Serotherapie: Observations Medicales. Paris. 
Rodenwalt, E. (1908). Studien zur Morphologie der Mikrofilarien. Arch. f. Schiffs- u. 
Tropenhyg. Beiheft 10. 
- (1909). Differentialdiagnose zwischen Mikrofilaria nocturna und diurna. Arch. f. 
Schiffs- u. Tropenhyg. p. 215. 
Skrjabin, K. I. (1917). Loa extraocularis nov. sp., parasite nouveau de l’ceil de l’homme. 
Compt. Rendus de la Soc. de Biologie, xxviii. 
EXPLANATION OF PLATES VIII AND IX. 
PLATE VIII. 
Larvae of Loa papionis stained by various methods; also the ovum immediately after fertiliza¬ 
tion. 
Fig. 1. The general structure of the larva is well shown but wet fixation is necessary for the 
demonstration of the excretory and genital cells. From blood-film stained by Pappenheim’s 
panoptic method. 
Fig. 2. Showing the streaks which connect the central viscus with the pore-chambers; also the 
excretory and genital cells which frequently develop along the course of these streaks. From 
thick blood-film fixed wet in 70 per cent, alcohol at 60° C. and stained with Giemsa’s solution. 
Fig. 3. Showing excretory and genital cells, pore-chambers, central viscus, nuclei of subcuticular 
cells, and body nuclei. From thick film fixed wet and coloured by Heidenhain’s iron haema- 
toxylin method. 
Fig. 4. Owing to the absence of the central viscus, the reduction of the body nuclei in this 
region is very obvious. From thick film fixed wet and stained with carbolmethylgreen- 
pyronin. 
Figs. 5 and 6. Showing the comma-shaped structures described by Fiilleborn as existing at 
either extremity in Ml. loa. Fig. 5. From dry film fixed in absolute alcohol and stained with 
Giemsa s solution. Fig. 6. From dry film stained with Giemsa’s solution without preliminary 
fixation. 
Fig. 7. Egg from Loa papionis immediately after fertilization. Showing spermatozoon, and so- 
called egg membrane which does not exist before the entrance of the spermatozoon. From 
fresh material examined in a 1 in 3000 solution of Azur II in 0 - 9 per cent, saline. 
Fig. 1 x by about 1200. 
Figs. 2-6 x by about 1000. 
Fig. 7 x by 1000. 
