THE DIATOMS OF GUERNSEY. 285 



T. GOnstPieta. Generally distributed. 



T. apieulata. 



Cymatopleura SOlea. Generally distributed, usually a short form. 



SuPirella biseriata. Valley below Le Casrouge (IV.) 



S. angusta. 



S. linearis. Marsh at the eastern end of l'Ancresse. 

 S. splendida. Saint's Bay Valley. 



S. StPiatula. Brackish pool at Pulias, abundant ; occasional in some other 

 parts of that coast. 



S. OValis. Common generally. 



S. OVata. Generally distributed and rather common. 

 S. fastuosa. Common on all parts of the coast. 

 S. lata. Common. 



Campylodiseus limbatus. 



C. eostatUS. Grande Mare, common. Cobo. Saint's Bay Valley. 



C. Ralfsii. Moulin Huet, in rock scrapings. 



C. deeorus. Generally distributed and not uncommon. 



C Hodgsoni. 



C. eximius. 



C. elypeus. 



C Simulans (Greg.) Frequent all round the coast. 



C. parvulus. 



C. spiralis. Saint's Bay Valley. Grande Mare. 



Striatella unipunetata. Common. 



Rhabdonema minutum. 



R. areuatum. Common. 



R. adriatieum. Common generally. 



Grammatophora marina. Common. 



G. maeilenta. A few specimens in a gathering from Perelle Bay. 

 G. hamulifera. Cobo rock scrapings, a few specimens. 

 G. serpentina. Common. 

 Cyelotella Dallasiana. 



Hyalodiseus eervinus. Marked with a query by Mr. Rylands. 



Podosira Montagnei. ' ' A form occurs not uncommonly which is probably 

 a peculiar variety of this species " (Rylands). 



P. hormoides. 



P. maculata. Frequent in all gatherings from low water mark. 



Melosira nummuloides. Common. 



M. Westii. 



M. Borrepi. 



M. varians. Common. 



Orthosira opiehaleea. 



0. mapina. Cobo. 



Coseinodiseus eentpalis. 



C oeulus Ipidis. 



C coneinnus. Moulin Huet. Cobo. 



C. PadiatUS- Rather common. 



C. U Meatus. 



