DR. G. DICKIE OX ALG.& FROM LAKE KTASSA. 281 



Notes on Algse from La^erlSTyassa, E. Africa. 



By George Dickie, M.D., F.L.S. 



[Eead November 21, 1878. J 



I am indebted to Dr. Laws, of the Livingstonia Mission, Lake 

 Nyassa, for the materials which yielded the organisms recorded 

 here. Nearly all were attached to aquatic Phaenogams ; and a 

 list of these may not be out of place, for which I owe to Profes- 

 sor Oliver assistance in naming them ; most were imperfect, and 

 therefore the genus only is stated in most cases. They are as 

 follows: — Vallisneria spiralis, Ceratophyllum sp., Potamogeton 

 sp., Myriophyllum sp., JJrticularia sp., Lagarosiphon muscoides?, 

 Trapa bispinosa ?, and one of the Marsiliaceae, viz. Azolla pinnata. 

 The list of Algae is doubtless very meagre, with exception of 

 the Diatoms ; still, as the locality is of some interest, I have 

 thought the species worthy of record in the meantime. I have 

 to acknowledge assistance from the Eev. Gr. Davidson in compi- 

 ling the list of Diatoms. 



Conferta ? A few fragments only ; the joints six times 



longer than broad, the diameter =-001 ; colour pale green. 



Buxboch-Ete partula, Ktz. There is no doubt about the 

 genus ; nearest to the species stated, if not identical. 



# 



Spibogyba pallida, n. sp. ? Pallide flavo-virescens, minus 

 lubrica, articulis cylindricis, diametro (='00125) 4plo longioribus, 

 fructiferis ? ; fasciis spiralibus 3, angustis, nodulosis ; zygo- 

 spores? Cytioderma cellulse, utroque fine nee protensum nee 



replicatum. 



From an island in Livingstonia Bay, Lake Nyassa. 



Cosmabjum makgabitifebum, Turp. The examples seemed 

 quite identical with the European species. 



Oscillabia ? Trichomatibus strictis, distincte articulatis, 



articulis diametro (-00005) aequalibus ; cytioplasmate pallide 

 olivaceo. 



Ltkgbta mabtensiaka, Menegh. ? The plant was attached to 

 Potamogeton, and seems identical with, or nearly allied to, the 

 species described by Meneghini, and found in thermal waters near 

 Verona, also at Baden-Baden, and reported by Mertens as found 

 at St. Helena. 





