Rev. Ki. Ashington Bullen—Aolian Deposits at Etel. 
Rissoa violacea, Desm. 
R. striata, Adams. 
R. membranacea, var. rabiosa, Mont. 
Rh. proxima, Alder. 
Rh. rufilabris, Mont. 
Alvania lactea, Mich. 
Barleeia rubra, Mont. 
Bittium reticulatwm (Da C.). 
Turritella communis, Risso. 
Chen pus pes-pelicani, 1. 
Cypren europea, Mont. 
Ocinebra erinacea (1..). 
Purpura lapillus (L.). 
Nassa reticulata (L.). 
NV. incrassata (Strom.). 
NV. pygmea, Lam. 
Buccinum undatun, L. 
Bela turricula, Mont. 
Mangilia (Hadropleura) septangularis, 
Pecten maximus, I. 
P. varius, L. 
P. pusio, L. 
P. opercularis, La. 
Lima hians, Gmel. 
Diplodonta rotundata, Mont. 
Tellina incarnata, L. 
T. balthica, L. 
T. tenuis, Da C. 
T. donacina, L. 
Gastrana fragilis (L.). 
Donax vittatus (Da C.). 
Spisula solida, var. elliptica, Brown. 
Mactra stultorum, L. 
Venus fasciata (Da C.). 
I”. verrucosa, L. 
Tl. gallina, Wh. 
V. chione, L. 
Trus irus, L. 
Mont. Tapes decussata, L. 
M. costata (Don.). T. aureus, Gmel. 
Thesbia nana (Lovén). T. pullastra, L. 
» Acte@on tornatilis, L. T. virgineus, I. 
Dentalium dentalis, L. Cardium tuberculatum, I. 
Acera bullata, Mull. C. norvegicum, Speng. 
C. edule, L. 
PELECYPoDA. Psammobia vespertina, Ch. 
P. ferroensis, Ch. 
Solen siliqua, Li. 
S. ensis, L. 
Pholas candida, UL. 
Pandora inequivalvis, L. 
Anomia ephippium, L. 
Arca lactea, Li. 
Mytilus edulis, L. 
M. adriatica, Lam. 
Ostrea edulis, Li. 
Brackish-water shells, brought down from the upper reaches, or 
living near Etel, where fresh water runs into the river, and mud 
accumulates. 
Lutraria oblonga, Ch. 
Scrobicularia piperata (Gmel.). 
Helicella barbara (L.), so common on our own sand-dunes in 
Cornwall, Portland, etc., was not observed at Etel. It occurred, with 
other xerophilous molluscs, at Auray, sunning itself on the hottest 
day of August last in the hottest places in bright sunshine on walls. 
On the other hand, Hele pisana, Mull, in countless myriads, provides 
its quota of material, organic and inorganic, to the general mass of 
the dunes. It is accompanied by Pomatias elegans, Mull., and Helicella 
itala, l., in considerable numbers. 
§ 10. The rough proportion of calcic material in the sand of the 
dunes is about one part in three by weight. I carefully dried the 
sand from the dunes, and then treated it “with hydrochloric acid; it 
was afterwards carefully washed eight times to remove the acid, and 
the residue after being thoroughly dried was again weighed, with 
the above result. Out of 875 gr. (2 oz.) Avoir., so treated, the 
residual quartz, mica, etc., weighed 582°625 gr., showing a loss by 
dissolution of 292°375 er. ‘of calcic material. Brttium reticulatum is 
so abundant as in places to colour the dune sand brown. ‘The colouring 
matter was dissolved with the shell material. 
§ 11. Much work remains to be done at our own sand-dunes, as 
