30 



PEOCEEDTNGS OF THE GEOLOGICAL SOCIETY. [Nov. 5, 



little doubt that the banks of the stream about Stewnor at one time 

 presented most favourable conditions for the growth of the Diato- 

 macece. 



At the same time the Diatomacece are not abundant in the deposit. 

 There is a great preponderance of vegetable and earthy matter, 

 which renders it troublesome and difficult to prepare for the micro- 

 scope. It is very likely that many of the Diatoms were lost on the 

 passage. Their scarcity and broken state would indicate their having 

 been carried a great distance by a current. 



Diatomacece of Lindale Cote Deposit. 



List of Species. 



Epithemia Hyndmannii 

 turgida 



granulata 



Zebra, vars 



Argus 



ocellata 



longicornis. 



Sorex , 



gibba 



ventricosa 



proboscidea 



Cyrnbella Ehrenbergii 



maculata 



Helvetica 



Cooconeis Placentula 



Cyclotella minutula, Kiltz 

 operculata 



Carnpylodiscus costatus 

 Cyniato pleura elliptica. . . 

 Nitzschia amphioxys ... 

 Navicula elliptica, Kiltz. 



lsevissima 



— gibberula 



scita 



• varians(Pinn.?), Greg, 



Pinnularia major 



viridis . . 



oblonga 



Stauroneis Phcenicenteron 

 Pleurosigma attenuatum . . 



Localities where they are found living. 



Pond at Shooting-lodge, Glen 



Tilt, Loch Leven. 

 Poaka Beck. Subalpine streams, 



Kirby, Furness, Lancashire. 



Poaka Beck 



Poaka Beck. Near Ulverston. 



Poaka Beck. 



Poaka Beck 



Poaka Beck. Near Ulverston 

 Poaka Beck 



Poaka Beck. Tarn near Ulverston 



Poaka Beck. Pviver Frome, Dorset 



Poaka Beck. Subalpine bogs, Ul 

 verston. 



Poaka Beck. Frequent in streams 

 about Ulverston. 



Peat-trenches. Ulverston. Carr 

 Kettle Moor. 



Poaka Beck. Subalpine bogs, Ul- 

 verston. 



Poaka Beck. Biver3 and springs 



Rivers, frequent. Near Ulverston. 



Poaka Beck, Rivers, common. 



Poaka Beck. Subalpine bogs, Ul- 

 verston. 



Peat-trenches, Ul- 



Poaka Beck. 



verston. 

 Poaka Beck. 



verston. 

 Poaka Beck. 



Subalpine bogs, Ul- 



Poaka Beck. Subalpine bogs, Ul- 

 verston. 



Poaka Beck. Subalpine bogs, Ul- 

 verston. 



Poaka Beck. Subalpine bogs, Ul- 

 verston. 



Poaka Beck. Subalpine bogs, Ul- 

 verston. 



Common in streams 



Other deposits in which they occur. 



Lough Mourne. Cantyre peat. 

 Lough Mourne. Cantyre peat. 

 Lough Mourne. 



Cantyre peat. 



Lough Mourne. Cantyre peat. 



Lough Mourne. Peterhead. 



Peterhead. 



Raasay earth. 



Lough Mourne. Premnay peat. 



Cantyre peat. Peterhead. 



Peterhead. 



Lough Mourne. Peterhead. 



Cantyre peat. 



Lough Mourne. Peterhead, &c. 



Lough Mourne. Peterhead. 

 Lough Mourne. Dolgelly earth. 



Cantyre peat. Dolgelly earth, 



&c. 

 Cantyre peat. Dolgelly earth, 



&c. 

 Peterhead. 



Cantyre peat. Lough Mourne, 



Peterhead. 

 Lough Mourne. Peterhead. 



