178 SUMMARY OF CURRENT RESEARCHES RELATING TO 



ectoplasm ; they burst the surface and project as sinuous filaments. 

 The nematocysts have an ovoid capsule, an anterior hyaline collaret, an 

 invaginated biconical invagination of considerable complexity, bearing 

 the spirally coiled lasso. A nematocyst begins as an intra-cytoplasmic 

 vacuole, which shows gradually increasing internal differentiation. 



Coccidia of the Rabbit.* — Adrien Lucet finds that the coccidian of 

 the liver (Mmeria stidse Lindemann = Coccidivm oviforme Leuckart 

 = Psorospermium cuniculi Rivolta) is distinct from the coccidian of the 

 intestine {Eimeria perforans Leuckart = Coccidium perforans Leuckart). 

 The oocysts of the two species are distinguishable. Those of the first 

 are on an average larger and have a slight brownish colour ; those of 

 the second show a constant and well defined residual body. 



Development of Adelina dimidiata.f— C. Schellackhas studied the 

 life-history of this parasite of the centipede, Scolopendra cingulata. He 

 describes the sporozoites and the schizonts to which they give rise, the 

 merozoites and their schizonts, the nuclear divisions in the schizonts, 

 the sporogony, the maturation phenomena in macrogametes, the forma- 

 tion of microgametes, and so on. 



* Comptes Rendus, clvii. (1913) pp. 1091-2. 



t Arb. k. Gesundheit. Berlin, xlv. (1913) pp. 269- 316 (3 pis. and 9 figs.). 



