220 ANNIE T'OHTEH. 



Porter, Annie (190!»). — "The Life-Cycle of Herpetomonas jaculum 

 (Leger), Parasitic in the Alimentary Tract of Nepa cinerea," 

 'Parasitology,' ii. pp. 3()7-391, 1 pi. 



Pratt, H. S. (1893). — " Beitriige /iir Kenntnis der Pupiparen (Die Larve 

 von Melophagus ovinus)," ' Archiv f. Naturgesch.,' liii. pp. 

 151-200. 1 pi. 



(1899).— "The Anatomy of the Female Genital Tract of the 



Pupipara as observed in Melophagus oviniis." ' Zeitschr. f. 

 wiss. Zool..' Ixvi, pp. 16-42, 2 pis. 



Robertson, Muriel (1909). — "Studies on Ceyhm Ha-matozoa : I, The 

 Life-Cycle of Tryi)anosoma vittata'," 'Quart. Journ. Micr. 

 Sci..' 53, pp. 665-695, 2 pis. 



Schaudinn, F. (1904). — "Generations- und Wii-tswechsel bei Trypano- 

 soma und Spirochajte (Vorl. Mitt.)," 'Arbeit, a. d. Kaiserl. 

 Gesundheitsitmte." xx. pp. 387-430. 20 figs. 



Swingle, L. D. (1909).—" A Study on the Life-History of a Flagellate 

 (Crithidia melophagi, n. sp.) in the Alimentary Tract of the 

 Sheep-Tick (Melophagus ovinus)," ' Joum. Infect. Diseases,' 

 vi, pp. 98-121, 3 pis. 



Woodcock, H. M. (i, 1909).—" The Ha-moflagellates and Allied Fonns," 

 article in ' Treatise on Zoology," edited by Sir Ray Lankester, 

 pt. i, fasc. i, sect. G., pp. 193-273. 



EXPLANATION OF PLATES 12 and 13, 



Illustrating Miss Annie Porter's paper on '• Critliidia 



melopliagia." 



[All figures were outlined with an Abbc-Zeiss camera-lucida, using a 

 2 mm. apochromatic (Zeiss), or yV inch achromatic (Zeiss) objective, 

 and compensating oculars 8 and 12 of Zeiss. The magnification is in 

 all cases approximately 1500 diameters, except where otherwise stated.] 



PLATE 12. 



Figs. 1-20.— Pre-flagellate Stages. 



Fig. 1. — Pre-flagellate with round nucleus, bar-like l)lepliaroplast. 

 Noflagellum. Crop. Giemsa. 



Fig. 2. — Oval pre-flagellate. Blepharoplast slightly constricted. 

 Crop. Delafield's hematoxylin. 



Fig. 3. — Di^ading pre-flagellate. Crop. Delafield's ha^matoxylin. 



