138 



SPOB.OZOA. 



63. HaBmogregarina thyrsoidese de Mello & Vales. (Fig. 62.) 



'\IIgemogregarina thyrsoidese, de Mello & Vales, 1936, pp. 403-4, 



pi. XXXV. 



Youngest form ovoid, with conspicuous nucleus and cyto- 

 plasm stained light blue with Romanowsky's stain. The full- 

 grown parasite shows irregular vacuoHzation of the cytoplasm. 

 The nucleus is generally central, often divided into two more 

 or less irregular masses, with indistinct nuclear membrane, 



B 



D 



Fig. 62. — Hsemogregarina thyrsoidem de Mello & Vales. A, young form ; 

 B, normal full-grown form ; G, form with central nucleus, 

 containing two chromatin granules ; D, form with one 

 nuclear mass at each pole. (After de Mello and Vales.) 



and minute volutin granules. Sometimes the chromatin 

 is reduced to two very minute centrally situated granules ; 

 or the nucleus is situated at one of the poles and composed 

 of two masses, or the two nuclear masses are situated one at 

 each pole. 



Habitat. — Blood of the freshwater eel, Thyrsoidea macrurus 

 (Bleeker) : Portuguese India, Nova Goa. 



64. Haemogregarina triedri Robertson. (Fig. 63.) 



■[Hsemogregarina triedri, Robertson, 1908, pp. 181, 184, figs. 10, 11. 

 Hsemogregarina iiedri, Wenyon, 1926, p. 1388. 



Fig. 63. 



-Hsemogregarina triedri Robertson. A, broader bean-shaped 

 form ; B, long form. (After Robertson.) 



