540 



PROTOZOOLOGY 



spores produced in each sporont; but sporont with 4 (or 3) rigid 

 transparent prolongations, difficult to see in life. One species. 



T. epeori L. (Fig. 259, m, n). In fat-bodies of nymphs of Epeorus 

 torrentium and Rhithrogena semicolorata; sporonts spherical, 9-10/i 

 in diameter, with usually 16 spores; prolongations of membrane in 

 sporont, 20-22ju long; spores pyriform, 3.5-4;u long. 



Genus Plistophora Gurley. Sporont develops into variable number 

 (often more than 16) of sporoblasts, each of which becomes a spore. 

 Several species. 







Fig. 259. a-e, Thelohania legeri (a, b, sporogony; c, d, mature sporonts; 

 e, a fresh spore), X1570 (Kudo); f-h, T. opacita (f, g, octosporous and 

 tetrasporous sporonts; h, a spore) X1570 (Kudo); i-1, Stempellia magna 

 (i-k, spores; 1, a spore with the extruded polar filament), X1570 (Kudo); 

 m, n, Trichoduboscqia epeori (m, sporont with mature spores, X1330; n, a 

 spore, X2670) (L^ger); o, p, Plistophora longifilis, X1280 (Schuberg). 



P. Simula (Lutz and Splendore). In larvae of Simulium spp.; 

 spores 4.5-8m by 3.5/z. 



P. longifilis Schuberg (Figs. 255, e; 259, o, p). In the testis of 

 Barbus fluviatilis; spores Sju by 2)u to 12jli by Qfi; extruded polar fila- 

 ments up to 510ju long. 



Genus Pyrotheca' Hesse. Schizogony and sporogony unknown; 

 spores elongate pyriform, anterior end attenuated, posterior end 

 rounded, slightly curved; sporoplasm in posterior region, with 1-2 

 nuclei; polar capsule large. One species. 



