OBSERVATIONS ON TliYPANOPLASJIA CONGEIU. 495 



Elniliirst, R., and Martin, C. H. — "On a Trypanoplasma from the 

 Stomach of the Conger Eel," ' Zool. Anz.,' Bd. xxxv, 1910. 



Friedrich, L. — " Uber Ban nnd Naturgeschichte des Trypanoplasma 

 helicis," 'Arch. f. Protistenk.,' Bd. xiv, 1909. 



Hartmann, M., and Prowazek, S. — " Blepharoplast Karyosom nnd 

 Centrosom," ' Arch. f. Protistenk.,' voL x. 1907. 



Keysselitz, G. — "' Uber Trypanophis Grobbeni," ' Arch. f. Protistenk.,' 

 Bd. cxi, 1904. 



"Generations nnd "Wirtswechsel von Trypanoplasma Bor- 



reli," 'Arch. f. Protistenk.,' Bd. vii, 1906. 



Laveran, A., and Mesnil, F. — ' Trypanosomas et Trypanosomiasis,' 

 Paris, 1904. 



Leger, L. — " Snr hi presence d'nn Trypanoplasma intestinal chez les 

 X^oissons," ' CR. Soc. Biol.,' vol. Iviii. 1905. 



Minchin, E. A. — " Investigations on the Development of Trypanosomas 

 in tha Tsetse flies and other Diptera," 'Qnart. Jonrn. Micr. Sci.,' 

 vol. 52, 1908. 



■■ Oljservations on the Flagellates Parasitic in the Blood of 



Freshwater Fishes." • Proc. Zool. Soc.,' 1909. 



Schaudinn, F. — " Generations nnd "Wirtswechsel bei Trypanosoma imd 

 Spirochaite," ' Arb. a. d. Kais. Gesnndheitsamte,' Bd. xx, 1904. 



Woodcock, H. M. — "The Ha3moflagellates,'' Lankester's 'Zoology,' 

 vol. i, fasc. 1. 



EXPLANATION OF PLATE 21, 



]liu>tratiiig" Mr. C. H. Martin's paper on "Observations on 

 Trypanoplasma congeri/' Part I. 



[All the fignres were drawn with the camera Incida at table level under 

 a Zeiss 1'5 mm. apochromat. and 18 compensating ocular. For the 

 nomenclature of the structures compare text-figure.] 



Fig. 1. — Normal active Trypanoplasma congeri showing flagella, 

 single basal granule, kinetonncleus and trophonucleus wdth its karyo- 

 some and intra-nuclear chromatin granules. A row of faintly marked 

 cytoplasmic granules may be seen passing under the membrane. 

 Flemming, iron-haamatoxylin, and eosin. 



Fig. 2. — Early stage of division. The whole body of the animal is 

 shorter and stouter. The basal granule has divided, the anterior 

 flagellnni is split along about a quarter of its length, and the beginning 



