ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



49 



the mania for establishing new genera and species upon very minor 

 variations from type. Among the 125 species and varieties which he 

 records and describes, we find the already overburdened nomenclature 

 of the fresh-water Rhizopoda enriched with two new genera, twenty- 

 four new species and forty-eight new varieties. The two new genera, 

 of which we reproduce the author's figures, are (1) Cystammba (incertae 

 sedis) ; (2) C. digitata g. et sp. n., distinguished by a chitinous thick- 

 walled cyst perforated by small foramina for the extension of blunt, 



Fig. 1. 



Fig. 2. 



digitate pseudopodia ; (3) Cijphoderiopsis — G. longicolUs sp. unica, in 

 which " the body-scales are nebuloid, circular, of various sizes, smaller 

 on the neck, continuous but not overlapping, fastened at the edges by 

 little dots of cement." The " selective " constructional powers of these 



Fig. 3. 



organisms are remarkably shown by the figures of Difflitgia hacillariim 

 Putz and Lesquerensia spicidosa sp. n., the latter of which forms a 

 remarkable test of flint sand and apparently auto-secreted spicules. 



H.-A. & E. 



Ciliate Protozoa from Uruguay. — Ergasto H. Cordero (Anales 

 de la Faculdad de, Medecina Montevideo, 1918, 3, fasc. 8-9), in a thesis 

 for the doctorial degree, describes ciliate Protozoa from the fresh-water 

 of Uruguay. The thesis is a first instalment of a larger work upon 

 free and parasitic Protozoa projected by the author, who, it may be 

 remarked, deplores his lack of works of reference upon the subject, 

 ftiough he subsequently consulted some authorities in the Natural 



E 



