106 



331. A series of forty-two botanical wall-diagrams, 

 on stout paper, 62 cm. (24^ ins.) high by 86 cm. (34 ins.) 

 broad, in frames. Drawn by Dr. Arnold Dodel-Port 

 and Carolina Dodel-Port. There is an 8vo translation 

 of the German explanatory text into English by D. 

 McAlpine, published by "W. and A. K. Johnston, Edin- 

 burgh. 



1888. Published by J. F. Schreiber, Esslingen a. N. 



PLATE I. Drosera rotundifolia. 1, Expanded leaf viewed 

 from above ( x 45) ; 2. Leaf with imprisoned insect after 2J 

 hours ( x 15) ; 3, The same after 18 hours ( x 15). 



PLATE II. Schizomycetes. 1, Bacteria in human blood ; 2, Bac- 

 teria from putrefying infusion ; 3, Spirochcete Obermeieri, from 

 blood of patients suffering from relapsing fever ; 4, Spirillum 

 undula, from putrefying fluids ; 5, Micrococci, from putrefying 

 blood ; 6, Micrococci from zoogloea, scum of putrefying fluids : 7* 

 MicTOCOCCus prodigiosus, from damp bread (all figures x 12,000). 



PLATE III. Bacillus anthracis. 1-5, Stages in the de- 

 velopment ; 6, Bacteria in the blood in cases of splenic fever ; 7, 

 Spore-producing filaments ; 8, 9, Fragments of a chain of spores ; 

 10, Portion of gelatinous scum with spores; 11, Free spores (all 

 figures x 12,000). 



PLATE IV. Volvox Globator. 1, A sexual monoecious colony 

 (x 1250); 2, Fertilisation of an oogonium (x 2800); 3, An 

 unripe oospore ( x 2800) ; 4, Bundle of spermatozoids in the 

 antheridium ( x 4300) ; 5, Isolated spermatozoids ( x 4300) ; 

 6, Spermatozoids killed by iodine to show the attachment of 

 the cilia ( x 4300) ; 7, Part of the periphery of a colony ( x 8000). 



PLATE V. Volvox minor. 1, Oospore in process of fertilisa- 

 tion ; 2, Ripe oospore ; 3, Rupture of the wall of the spore and 

 swelling of its contents ; 4, First division of the contents of the 

 spore ; 5, Four daughter-cells formed by the second division ; 6, 

 Germinating spores ; 7, Young colony (all figures x 2660). 



PLATE VI. Ulothrix zonata. A, Filament of the alga ; B-D, 

 Zygospores in various stages of development ; E, Ripe zygospore ; 

 F, Young filament from a macrozoogonidium ; G, Groups of 

 young filaments from microzoospores ; H, Young filament pro- 

 duced without conjugation (all figures x 2400). 



PLATE VII. (Edogonium diplandrum. 1, Portion of a young 

 filament before the sexual distinction is manifest (x 1000); 2, 

 Portion of a non-sexual filament with a zoospore escaping ; 3a, 

 Green zoospore; 36, Two-celled plant formed from the green 

 zoospore; 4, Portion of a female filament with two young 

 oogonia ; 5, Portion of a male filament with an androzoosporo 

 issuing from it ; 6, Portion of a female filament with ripe 

 oogonia; 7, Ripe oogonium just fertilised ; 8, Oogonium with 



