CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 297 



R. violacea, Desm. [A.M.N. J. One dead example dredged. 



This species occurs at several places in the Clyde district 



(Brown). 

 ** Alvania subsoluta var. abyssicola, Forbes. {Rissoa 



abyssicola). Two dead specimens off Lismore. In upper 



Loch Linnhe Mr. Knight took this species in abundance 



in II, 14, and 24 fathoms. It was discovered by Messrs. 



MacAndrew and Forbes in Loch Fyne. 

 ** A. cancel lata, Da Costa. A single dead specimen dredged 



m Kerrera Sound. 

 A. reticulata, Mont. Common alive and dead in the 



dredgings. 

 ** A. punctura, Mont. A few dead specimens in the 



dredgings. 

 ** Flemingia costata, Adams. {Rissoa costata). Several 



dead specimens dredged. 

 Cingula semistriata, Mont. {Rissoa semistriatd). [A.M.N.]. 



Taken alive in Lamitiaria washings. 

 ** C. obtusa, Cantr. {Rissoa soluta, Auct. Britt.). This 



occurs rather sparingly, alive and dead, in the dredgings. 



Some of the specimens are of large size, one measuring 



2 mm. in height. 

 ** C. trifasciata, Adams. {Rissoa ci/igillus). Very 



abundant everywhere under stones just below high water 



mark. 

 Onoba striata, Adams. {Rissoa striata). Very common 



under stones on the shore, and in some of the dredgings 



in which a few large distorted specimens (var. distorta, Mar.) 



occurred. Of the var. saxatilis, Miill. { = arctica, Lov.) one 



live and several dead examples were dredged. 

 O. vitrea, Mont. [A.M.N.]. One dead specimen dredged. 

 Hycirobia stagnalis. Bast. {R. tilvce). A few examples of the 



variety barleei.^ Jeff, were taken alive under stones on the 



shore south of Oban. Jeffreys records this variety from 



the Hebrides. 



