ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 401 



of sporulatioii with forty to sixty spores. The spores are spherical, 

 2-3 ju, in diaiiieter, with a very delicate pellicle. Endoparasites of 

 ovarian cells have been very rarely observed. 



New Sporozoon.* — 0. Duboscq describes Selysina perforans g. et 

 sp. n., a curious Sporozoon found by de Selys-Longchamps in the 

 Ascidian, Stolonica soclalis. At the Ijeginning of its development 

 (nodular cysts with banana-like spores) it suggests a Schizogregarine. 

 The presence of elements of different age in the same thick-walled cyst 

 suggests comparison with Sarcosporidia, such as Gastrocijstis. Small 

 tbick-walled cysts in Selysina contain bundles of sporozoites. Large 

 thick-walled cysts in Selysina contain multinuclear spheres and helio- 

 spores. The heliospores resemble those of Aggregata, and suggest that 

 Selysina should be ranked provisionally among the Coccidiomorpha. 

 The reactions of the Ascidian in forming nodular cysts is very remark- 

 able. 



Sporozoa from Glossobalanus minutus.t— L. Leger and.O. Duboscq 

 describe from this Enteropneust three new Sporozoa — Eimeria(?) 

 epidermica sp. n., Eimeria(.') heauchampi sp. n., and Selenidium metch- 

 iilkovi sp. n. The first is distinctive in the characters of its nuclei and 

 chromatoid substance. The occurrence of Sporozoa in the epidermis is 

 rare. The schizogony and gamonts of the second and third species are 

 described. Particular attention may be directed to the beauty and 

 detail of the illustrations. 



Toxic Action of Copper Compounds of Amino-Acids on Protozoa.J 

 J. A. Shaw-Mackenzie has experimented with copper compounds of 

 amino-propionic-acid (alanine) and of amino-acetic-acid (glycine) on 

 Opalina, Parammcium, Amceba, etc., and finds that the toxicity is very 

 high. 



* Comptes Rendus, clxiv. (1917) pp. 450-3. 



+ Ann. Inst. Pasteur, xxxi. (1917) pp. 60-72 (3 pis.). 



X Proc. Physiol. Soc, in Journal of Physiology, li. (1917) Nos. 1-2, pp. iii-iv. 



