ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 193 



common Oyclad. It is an astomatous form, with straight rows of long 

 cilia, with a sharp anterior end and a rounded posterior end. It has a 

 special fixing apparatus, a sort of sucker, at the anterior end. The 

 micronucleus is relatively large. The parasitism is intimate, and some- 

 times intracellular. 



Hgemogregarina splendens.* — C. Franca discusses the parasite of 

 the frog's blood known as ffaemogregarina splendens Labbe (= Dactylo- 

 soma splendens Labbe, Laveranin ranarum Grassi and Feletti). He 

 devotes special attention to the binucleate condition, and to the re- 

 semblance between H. splendens and Trypanosornes. 



New Hagmogregarine from a Lizard. j" — A. Laveran and Salimbeni 

 describe a new parasite (ffaemogregarina tupinambis sp. n.) of the red 

 blood corpuscles of Tupinambis teguixin. It enters the corpuscles and 

 brings- about interesting changes — e.g., hypertrophy of the nucleus— 

 before destroying them. 



Hasmogregarina lacerta3.J — A. Laveran and A. Pettit discuss the 

 occurrence of two kinds of merozoite-cysts of this parasite in the lizard. 

 That is to say, the endogenous multiplication in cysts seems to occur in 

 two forms, cysts with macromerozoites and cysts with micromerozoites. 

 It seems probable that the merozoites are not always formed in the 

 same way ; the karyosome may divide into four or eight, or it may go 

 on dividing into more numerous and smaller merozoites. It is probable, 

 but quite unproved, that part of the life-history is passed in a tick. 



Trypanosome in Zanzibar Horse.§ — A. Edington notes that hitherto 

 no trypanosomiasis has been recorded from Zanzibar or Peinba. He 

 has found a case, however, in a horse. The trypanosome somewhat 

 resembles T. dimorphon, but is smaller and rather more delicate. 



Sexual Reproduction in Actinocephalida3.|| — P. Leger and 0. 

 Dubosq find in these Gregarines a sexual process like that in Stylo- 

 rhynchus. Two similar forms of the same size unite by their protomerites ; 

 the male has a denser, more stainable, cytoplasm; there is in both a 

 precocious differentiation of somatic nuclei and sexual nuclei ; there is 

 anisogamy with male flagellate elements (of two kinds) and globular 

 female elements ; the gametes have a short mobile phase and unite as in 

 Stylorhynch us ; the result of the union becomes a spherical spore, and 

 exhibits nuclear multiplication. 



* Arch. B. Inst. Bacterid. Camara Pestana, ii. (1908) pp. 123-31 (12 figs., 1 pi.). 



f Comptes Rendus., cxlviii. (1909) pp. 132-1 (7 figs.). 



% Op. cit., cxlvii. (1908) pp. 1378-82 (7 figs.). 



§ Proc. Roy. Soc, Series B, lxxx. (1908) pp. 545-9. 



|i Comptes Rendus, cxlviii. (1909) pp. 190-3. 



