644 NOTICES OF BOOKS. 



rhizopodal fauna of the districts in which they reside. In this 

 connection it may be remarked that with the exception of Loch 

 Ness not one of the larger British lakes has been investigated as 

 to the rhizopodal fauna of either the plankton or deposits, a 

 large and unworked field awaiting investigation. To the micro- 

 scopist desirous of working in this interesting department of 

 micro-fauna we may draw attention to two papers recently 

 published: (1) Dr. Eugene Penard, "Collection and Preser- 

 vation of Freshwater Rhizopoda," Journ. Q.M.C., Vol. X., 

 pp. 107-116; (2) G. H. Wailes, "Notes on the Structure of 

 Tests of Freshwater Rhizopoda," Journ. R.M.S., April, 1915, 

 pp. 105-116, 2 plates. 



In the third volume of The British Freshwater Rhizopoda there 

 are twenty-five plates from drawings made by Mr. Wailes, a 

 larger number than in either of the previous volumes. Of 

 these eight are coloured, and their beauty cannot be too highly 

 praised. Through the courtesy of the Secretary and Council of 

 the Ray Society we are able to present our members with a copy 

 of Plate XLIV. The uncoloured plates are in collotype, and 

 are, we think, a great improvement on the half-tone reproductions 

 which appeared in the previous volumes. The frontispiece to this 

 volume is a particularly interesting one, being reproductions 

 in collotype of photo-micrographs from preparations made by 

 Dr. Eugene Penard, of Geneva. 



In the case of all three volumes Mr. John Hopkinson has been 

 responsible for the synonymic references, and the amount of labour 

 and critical insight that he has devoted to this share of the work 

 can only be fully realised by one who has done similar work. 

 The arrangement of the references in this volume is an improve- 

 ment on that of the two previous volumes. 



Description of Plate 40.* 



Paulinclla chromatophora Lauterborn. Figs. 1,2: Side view 

 and transverse section of an active individual, x 1,500. Fig. 3 : 

 Process of division, x 1,500. Fig. 4 : Nucleus, x 2,000. All 

 after Lauterborn . 



P. chromatophora var. pulchella (G. S. West) Wailes. Figs. 5, 6 : 



* British Freshwater Rhizopoda, Vol. III., PI. XLIV. 



