ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 63 



New Mode of Multiplication in Amoebidium.* — Jean L. Lich- 

 tenstein describes in a species of Amcebidium from Simocephalus vetulus 

 how an active amoeboid unit, which emerf^ed along with seven others 

 from a fragmenting " tube," became after a time fixed on the host and 

 elongated into a " tube " or " endoconidium." Tiiis lends support to> 

 the view that Amoebidiacea; are Thallophytes, not Protozoa. 



Blastocystis entercola.t — A. Alexeieff discusses the reserve albu- 

 minoid bodies of this organism (consisting of paravolutin or 

 metachromatin), the mitochondria and what they give rise to, the 

 nuclear origin of the mitochondria, and the amoeboid parasite Mitrnria 

 dangeardi AlexeieflF, which penetrates the Blastocijstis cysts and feeds on 

 the reserves. The conclusion that Blastocystis is fungoid is confirmed. 



New Species of Pseudoklossia.:}: — L. Leger and 0. Duboscq describe 

 a new Coccidian, Pseudoklossia pectim's sp. n., from the kidney of Fecten 

 ynaximus. They give an account of the gamonts, the macrogametes^ 

 and the formation of sporozoites. Xo microgametocyte was found. The 

 relationships of Adeleidge and Eimeridas are discussed. 



Life-cycle of Myxidium gadi.§ — F. Georgevitch describes the life- 

 history of this parasite, which he found in the gall-bladder of Gadus 

 poUachia. From the ripe spore there emerges a binucleate sporoplasm ; 

 the zygote exhibits schizogony, and there are several generations of 

 schizonts ; these exhibit sporogony with one spore or two spores or 

 many spores. When there are many spores, there are often phenomena 

 of plasmotomy. The parasites are never intracellular. 



Leptotheca and Grlugea.|| — J. Georgevitch describes Leptotheca 

 elongata Thelohan, a Myxosporidian, from the gall-bladder of MoteUa 

 . tricirrata, the three-bearded rockling. An account is given of the spores, 

 the vegetative forms, the schizogony, and the sporulation. In the 

 sporulation a vegetative (plasmodial) nucleus is to be distinguished from 

 a dozen (germinative) spore-nuclei. The author also gives a minute 

 account of the spore of Glugea marionis from the gall-bladder of JuJis, 



* Arch. Zool. Exper., Ivi. (1917) Notes et Kevue, No, 4, pp. 95-9 (1 j&g.). 

 t Arch. Zool. Exper., Ivi. (1917) Notes et Revue, No. 5, pp. 113-28 (3 figs.). 

 + Arch. Zool. Exper., Ivi. (1917) Notes et Revue, No. 4, pp. 88-94 (8 figs.). 

 $ Comptes Rendus, clxv. (1917) pp. 797-9. 

 ill Bull. Soc. Zool. France, xlii. (1917) pp. 99-107 (10 figs.). 



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