344 GUERNSE Y. 
Triceratium armatum, Roper. (Z. spinosum, Bail.) 
Triceratium Brightwellii, West. 
Amphitetras antediluviana, Ehr. 
Generally distributed, but especially common on the south coast. 
The var. 8, with deeply concave sides, occurs at Moulin Huet, 
sparingly intermixed with the type. In my early diatom-collecting 
days, some five-and-twenty years ago, I used to find this var. (6 in 
profusion on the shores of the Solent, near Lymington. Intermixed 
with it, though always sparsely, was the splendid pentagonal var. y, 
an excessively rare form, and one of the most brilliant and beautiful 
of British diatoms, resembling a star composed of small diamonds. 
Eupodiscus Ralfsii, Sm. 
Frequent in low-water gatherings all round the coast. 
Eupodiscus crassus, Sm. 
Eupodiscus subtilis, Greg. 
A few specimens from Petit Bot Bay, at extreme low water. 
Eupodiscus tessellatus, Roper. 
Eupodiscus fulvus, Sm. 
Bordeaux, one specimen. 
Auliscus sculptus, Ralfs. 
Petit Bot Bay, one small specimen. 
Chaetoceros Wighami, Brightw. 
‘Taken by the skimming-net. Found in myriads at or near the 
surface: day quite calm. These are evidently floating species: all 
contained bright yellow endochrome: could be seen by the naked 
eye.’ (Rylands.) 
Rhizosolenia styliformis, Brightw. 
‘ A second species occurs in one of the sea-surface skimmings—a 
very fine form, but not in a condition to be identified.’ (Rylands.) 
