CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 291 



operations were conducted. These are Peden islandicus, valves 

 of which were dredged off Bhaic Island and in the Sound of 

 Mull ; and the little Portlandia pygmcea and F. lucida, of which 

 the former still lives in the Minch, and the latter in deep water 

 at a considerable distance north of the Hebrides. 



All the available literature on the Mollusca of the West of 

 Scotland has been consulted. The most noteworthy records of 

 Oban species are Canon A. M. Norman's list and Mr. R. D. 

 Darbishire's supplement. The latter gentleman has kindly lent 

 a MS. list drawn up from the results of his own work, together 

 with a few additional notes contributed by the late Mr. F. 

 Archer, of Liverpool. In the case of species named in these 

 lists the initials of the respective writers are given, except where 

 the occurrence of the form is recorded by both, when they are 

 omitted to save space. 



The other works to which reference is occasionally made 

 are — 



E. Forbes, ' British Marine Conchology,' 1850. 

 J. G. Jeffreys, 'British Conchology,' 1863 — 69. 

 A. Brown, 'Mollusca of the Firth of Clyde,' 1878. 

 References to previous records are given in square brackets. 



In the following list species which have been recorded but 

 which were not obtained by us are marked with one asterisk, 

 and those which we have been able to add to the list with two. 



** Sepiola rondeletii, Leach. Three specimens dredged. 

 ** Leuconia bidentata, Montg. {Melampus bidentatus). 



Very common under stones below high water mark on the 



shore south of Oban. 

 ** Alexia myosotis, Drap. (^Melampus myosotis). Two or 



three taken alive among decaying sea-weed under stones 



at high water mark near Kerrera ferry. 

 ** Doris tuberculata, Cuv. Not uncommon under stones 



at low water. 



