188 MISCELLANEA. 



in the immediate neighbourhood, but in private ground. Owing 

 to its total disappearance from the first habitat, we think it un- 

 advisable to reveal the exact position of the second one. I have 

 however this year fished it out of Crag Lough. Nitella is espe- 

 cially valuable for showing the rotation or cyclosis of its sap 

 with beautiful distinctness, and, if kept moderately warm, at all 

 seasons. 



Nostoc. — In the same ditch, for three years in succession, there 

 appeared an abundant growth of Nostoc, many examples reaching 

 the size of a small plum : these covered submerged stones, and 

 were also attached to aquatic plants and grass dipping in the 

 water. In 1878 although numerous, the Nostocs did not attain 

 the size of their predecessors, and were only found after a care- 

 ful search. 



Batrachospermum moniliforme was also common here, cling- 

 ing to the bottom and forming a slimy covering to sticks, stones, 

 and the clayey sides of the runner. 



Chcetophora elegans may also be noted as occurring in the 

 same habitat, together with Draparnaldia glomerata. 



Fontinalis antipyretica was also found adherent to submer- 

 ged stones. 



Vohox glohator. — At Eyton Willows. This habitat was re- 

 corded many years ago by Mr. now Professor Gr. S. Brady. It 

 also appeared plentifully in two ponds at Benwell Bank Top in 

 1878 : also in the present year at Croxdale. 



Chcetophora endivifolia. — Attached to decaying stems of Equi- 

 setum in a pond at Sugley Field, Lemington. 



Hydrocharis morsm-rance. — The Progbit still appears abun- 

 dantly in its old habitat near Eyton Station. I am not aware 

 that it has been found elsewhere in this district. 



Cystopteris dentata. — Along the walls skirting the military 

 road to the south of Crag Lough, there is a free growth of C. 

 fragilis, and with it is another species or variety. I dried and 

 sent fronds of each kind to the editor of "Hardwick's Science 

 Gossip" for determination, and elicited the following reply in 

 No. 162, August 1st, 1877 : "Your specimens are very interest- 

 ing. I^Oi 1, Cystopteris dentata; No. 2, C. fragilis. They are 



