290 CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 



home to be searched through at leisure. This has yielded 

 an abundant harvest of the smaller species. Altogether on6 

 hundred and ninety-six species were obtained, some of them, 

 as will be seen from the appended list, of considerable rarity. 



After careful consideration it has been decided to draw up 

 and publish a full list of all the species now known to inhabit 

 the district, those previously recorded but not taken during our 

 excursion as well as those newly found by us being distinguished 

 by prefixed marks. 



Every care has been taken to ensure accuracy in identi- 

 fication, doubtful specimens always having been submitted to 

 well-known authorities, and we here take the opportunity of 

 thanking Canon Norman, Mr. H. K. Jordan, and Mr. J. T. 

 Marshall for their kind assistance. 



The nomenclature used by the late Dr. Jeffreys in his 

 * British Conchology ' having, in many cases, been superseded 

 by a newer and frequently a better and more correct one^we 

 have followed that adopted by Canon Norman in his ' Revision 

 of the British MoUusca' (Annals and Magazine of Natural 

 History, 1890), as far as it is at present completed, and that 

 in the privately published Catalogue of his Museum for the 

 remainder. A few emendations furnished by this gentleman 

 in a letter have also been adopted. The better known synonyms 

 of Jeffreys are given italicised in brackets. 



One of the species met with seems worthy of special 

 mention. Cyclosirema millepiinctatum, Friele was recorded as 

 occurring in British waters by one of the writers early in the 

 present year (Chaster : On the occurrence of Cyclostrema 

 inillepunctatum, Friele, off the Isle of Man. — Conchologist, 

 June, 1893). It is interesting to note that so soon aflerw.irds 

 it has been found again at another locality so far distant. 



It is perhaps not out of place here to remark that in addi- 

 tion to the species mentioned in the list, which are to all 

 appearance recent, there were dredged fossil or semi-fossil 

 shells of forms which no longer inhabit the area in which our 



J.C., vii., Jan. 1894. 



