130 



PROF. G. DICKIE ON ALG^ FEOM 



Eunotia Camelus, Grev. 

 E. formica, Grunow. 



Mud from stomach of "Acari," a 

 species of Loricaria, a mailed 

 fish of the region *. 



Melosira californica, Ehrenb. ? 



Nitzschia constricta, Pritch. 



Surirella linearis, W. Sm. 



S. tenera, Greg., var. 



S. biseriata, Breb. 



S. oophsena, Ehrenb. ? 



Gomphonema coronatum, Kuetz. 



Synedra pulchella, Kuetz. 



Navicula undosa, Ehrenb. 



N. viridis, Kuetz. 



N. appendiculata, Kuetz. 



In a stream at Lagos, mouth of 



the Rio Negro. 

 Cocconeis placentula, Ehrenb. 

 Synedra ulna, Ehrenb. 

 S. biceps, Kuetz. 

 Navicula amphirynchus, Ehrenb. 

 N. lanceolata, Ehrenb. 

 N. rhomboides, Ehrenb. 

 Ceratoneis excisa, Ehrenb. 

 Himantidium pectinale, Kuetz. 

 Actinella mirabilis, Grunow, and 

 several forms of Eunotia. 



Hole in fallen tree, Paricatuba, 



Rio Purus. 

 Navicula biceps, Ehrenb. 

 N. Brauniana, Grunow. 

 N. rhomboides, Ehrenb. 

 N. mesolepta, Ehrenb. 

 N. bohemica, Ehrenb. 

 N. cuspidate, Kuetz. 

 N. gibba, Ehrenb. 

 N. dicephala, Ehrenb. 

 Gomphonema cristatum, Ralfs. 

 G. turris, var. apiculatum, Grunow. 

 Melosira varians, Ag. 

 M. subflexilis, Kuetz. 



Stauroneis anceps, var. linearis, 



Ehrenb. 

 Diadesmis confervacea, Kuetz. 

 Desmogonium guianense, Ehrenb. 



Mud on leaves left by fall of 

 Rio Negro. 

 Gomphonema vibrio, Ehrenb. 

 G. anglicum, Ehrenb. 

 Navicula rhomboides, Ehrenb. 

 N. gibba, Ehrenb . 

 N. acuta, Kuetz. 

 Ceratoneis alpina, Grunow 1 

 Himantidium gracile, Grunow ?, 



and forms of Eunotia. 



Wet sandstone rocks at Manaos. 

 Navicula rhomboides, Ehrenb. 

 N. macilenta, Ehrenb. 

 N. cryptocephala, Kuetz. 

 N. lata, Breb. 

 N. subcapitata, Greg. 

 N. exigua, Greg. 

 Himantidium pectinale, Kuetz. 

 Cymbella scotica, W. Sm. 

 Surirella linearis, W. Sm. 

 Nitzschia sigma, W. Sm. 



Jaguarary, Tapajos. 

 Stauroneis phcenicenteron, E^reni. 

 S. phyllodes, Ehrenb. 

 Navicula americana, Ehrenb. 

 N. firma, Kuetz. 

 N. oblonga, Kuetz. 

 N. rhomboides, Ehrenb. 

 N. gibba, Ehrenb. 

 N. rupestris, G'Meara. 

 N. termitina, Ehrenb. 

 N. major, Kuetz. 

 Synedra ulna, Ehrenb. 

 Gomphonema lanceolatum, 



Ehrenb. 

 G. dichotomum, Kuetz. 

 Cymbella pusilla, Kuetz. 

 C. obtusiuscula, Kuetz. 



* The diatoms recorded were probably attached to vegetable &c. food. 



