ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 317 



the formation of the theca upon exposed parts of the cell body. Anterior 

 schizonts are smaller than the posterior ones, suggesting the effect of the 

 direction of locomotion. 



Haplomitosis in Euglenids. * — A. Alexeieff points out that this 

 mode of nuclear division, characteristic of Euglenids, is by no means 

 restricted to them, but occurs also in Protomonads, Peridinids, Cysto- 

 flagellates, Amcebaj, Coccidia, and Holotricha. Three phenomena mark 

 haplomitosis. (1) The caryosome is drawn out into a rod which after- 

 wards becomes dumb-bell shaped. (2) The peripheral chromatin is 

 distributed on the filaments of linin, so that a sort of beaded appearance 

 results. (3) There is an acceleration in the division of this peripheral 

 chromatin, which is distributed in two groups to opposite poles before 

 the division of the caryosome. These may be called pseudopolar bodies, 

 to distinguish them from the true polar bodies of the promitosis which 

 are formed at the expense of the caryosome. 



New Parasitic Peridinians.j — E. Chatton establishes several new 

 genera of Peridinians which occur as parasites on or in various pelagic 

 animals, such as Appendicularians. In Oodiniwn fritiUarise g. et sp. n. 

 there is a marked fibrillar structure in the attaching stalk. Several new 

 species of Blastodinium from the intestine of parasitic Copepods are 

 described, and other new and strange forms. 



New Species of Nina.| — H. Merton describes Nina indica sp. n., a 

 Gregarine from the intestine of Scolopendra suhspinipes Leach. It shows 

 the characteristic protomerite drawn out into two long processes. These 

 bear numerous filaments, which penetrate between the epithelial cells of 

 the host. There is a quite unusual type of nucleus with the chromatin 

 in one lonsr coiled filament. 



'& 



Binucleate Character of some Haemogregarines.§ — A. Carini calls 

 attention to the presence of a blepharoplast, or kineto- nucleus, in 

 Hsemogregarma tupinamhis from a lizard, and in another from a frog. 

 The number of cases of two nuclei in Hfemogregarines is mounting up. 



Coccidia of the Genus Pfeifferinella.|| — L. Leger and A. Ch. 

 Hollande have studied these Coccidia which are characteristic of the 

 liver of Pulmonate Gastropods. They are characterized by (1) a macro- 

 gamete provided with a vaginal tube, (2) excessively minute microgametes 

 in the form of pinheads, and (?>) the oocyst giving rise to a single 

 octozoic spore. They must be referred to the family Caryosporida3 and 

 the sub-order Eimeridea octozoica. 



Hsemogregarine of Naja haje.lT — A. Conor describes nsemogregarina 

 weissi sp. n. from this snake, where it occurs in two forms — small and 

 large — within the red blood corpuscles, sometimes bringing about the 

 complete disappearance of the nucleus. 



» C.E. Soc. Biol., Ixxi. (1911) pp. 614-17. 

 + Bull. Soc. Zool. France, xxvii. (1912) pp. 81-93 (8 figs.), 

 t Abhandl. Senckenberg. Nat. oes., xxxiv. (1912) pp. 119-26 (1 pi.). 

 § Cemralbl. Bakt. Parasitenk., Ixi. (1911) pp. 542-4 (5 figs.). 

 i! Arch. Zool. Exper., ix. (1912) Notes et Revue, No. 1, pp. i-viii (7 figs.). 

 i C.R. Soc. Biol., Ixxii. (1912) pp. 374-6 (7 figs.). 



