326 GUERNSE Y. 
Coscinodiscus radiatus, Ehr. 
Not uncommon in shore gatherings all round the coast. 
Coscinodiscus lineatus, Ehr. 
Coscinodiscus eccentricus, Ehr. 
Two valves at Moulin Huet, and one at Petit Bot. Frequent in 
a mixed gathering from the Salerie. 
Coscinodiscus minor, Kutz. 
Common in some of the gatherings from Cobo. Moulin Huet 
and Bordeaux, occasional. In Mr. Rylands’ list two species are 
given under this name: Cosc. minor, of Kutzing, and Cosc. minor, of 
Ehrenberg. The litter species, according to Rabenhorst, is Orthosiva 
angulata, Greg. Cosc. minor, of Smith (Brit. Diat), is A/eostra 
nivalis, Sm. 
Coscinodiscus nitidus, Greg. 
Rather frequent in a gathering from Perelle Bay. A few 
specimens at Cobo and Petit Bot Bay. 
Actinocyclus quinarius, Ehr. 
‘This was the only form seen of the A. montliformis, Ralfs. It 
was very scarce.’ (Rylands.) 
Asterolampra flabellata, Grev. 
‘ This species has occurred two or three times in different 
gatherings.’ (Rylands.) 
Actinoptychus undulatus, Ehr. 
More or less common in all shore gatherings: varying greatly 
in size, and often very small. 
Actinoptychus senarius, Ehr. 
Podosira Montagnei, Ehr. 
‘A form occurs not uncommonly, which is probably a peculiar 
variety of this species.’ (Rylands.) 
Podosira hormoides, Kutz. 
Podosira maculata, Sm. 
Frequent, occasionally abundant, in all gatherings from low- 
water mark. 
Melosira nummuloides, Ag. 
Common on all parts of the coast. 
Melosira Westii, Sm. 
Melosira Borreri, Grev. 
