54 



NOTES ON THE AGRICULTURE, BOTANY 



Another picture represents the ponds overgrown with 

 water-chestnuts and lotus. There were discovered a great 

 quantity of the inferior vegetable organisms. Such species 

 as — Achnanthes lanceolata, A. hungarica, Navicula cuspidata, 

 Amphora ovalis, Trachelomonas volvocina, Phacus pyrum, 

 Polyedrium minimum, Dictyosphaerium Ehrenbergianum, 

 were more often observed, than — Scenedesmus bijugatus S. 

 quadricauda, Lepocinclis Biitschii, Phacus caudata, Ph. long- 

 icauda, Ph. Myersii, etc. 



The mud of this pond was of a greenish-yellow color for 

 the reason that it contains clay. Here we meet many 

 Diatomaceae the list of which is given below. 



Several kinds of Nitzschia, and the variety of Surirella 

 ovalis, Navicula cuspidata, Oscillaria princeps, 0. tenerrima, 

 Spirulina gomontii and Arthrospira jenneri, which were 

 found in the mire, show the dirty state of the ground. 



The systematical composition of algae discovered in the 

 collection was interesting. Altogether there were denned 

 125 forms. The most remarkable were the various 

 Euglenaceae among which has been discovered 6 new forms. 

 The list of all the organisms is as follows : — 



Melosira varians Agardh. 



M. granulata Ehrenb. 



M. islandica 0. Mull, subsp. 



helvetica 0. Mull. 

 Cyclotella comta (Ehrenb. ) Kiitz. 

 Elagilaria construens (Ehrenb.) 



Grunow var. pusilla Grunow. 

 E. Crotonensis Kitton. 

 Synedra Ulna var. splendens 



Kutz. 

 Eunotia pectinalis Kutz. var. 



curta V. Heurck. 

 E. diodon Ehrenb. 

 E. lunaris Ehrenb. 

 E. flexuosa Kutz. 

 Achnanthes lanceolata Breb. 

 A. hungarica Grunow. 

 Cocconeis placentula Ehrenb. 

 Diploneis ovalis Hilze. 

 Navicula cuspidata Kutz. 

 N. ambigua Ehrenb. 

 Pinnularia gentilis Donkin. 

 P. mesolepta Ehrenb. 

 Stauroneis anceps Ehrenb. 

 Gyrosigma acuminatum Kutz. 



var. curta Grunow. 

 G. scalproides Roebenh. 

 Gomphonema gracile (Ehrenb.) 



Grunow var. pusilla Grunow. 

 G. parvulum Kutz. 

 G. lanceolata Ehrenb. 

 G. augur Ehrenb. 



G. constrictum Ehrenb var. curta 



Ehrenb. 

 Cymbella cuspidata Kutz. 

 C. tumida Breb. 

 Amphora ovalis Kutz. 

 A. perpusilla Grunow. 

 Rhopalodia ventricosa (Grunow) 



0. Mull. 

 Rh. zibberula (Kutz) 0. Mull 



var. producta Grunow. 

 Rh. giba (Ehrenb) 0. Mull. 

 Nitzschia sigma W. Sm. var. 



sigmatella Grunow. 

 N. obtusa W. Sm. var. brevis- 



sima Grunow. 

 N. Palea Kutz. 

 N. acicularis Kutz f. t. 

 N. stagnorum Rabenh. 

 N. acicularis Kutz var. closter- 



oides Grunow. 

 N. vermicularis (Kutz) hantzsed. 

 Hantzschia amphioxys (Kutz.) 



Grun. var. pusilla Dippel. 

 H. amphioxys (Kutz)Grunow f.t. 

 Cimotopleura solea Breb. 

 Surirella ovalis Breb. var. minuta 



Breb. 

 S. oralis var. pinnata (W. S.) 



V. Heurck. 

 S. ovalis var. ovata Kutz. 

 S. elegans Ehrenb. 

 S. linearis W. Sm. 



