CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 303 



Emarginula crassa, Sow. [Jeffreys; A.M.N. ; one very fine 

 dredged alive amongst sliingle, Loch Etive, R.D.D. MS.]. 

 Two adult and a few smaller ones dredged dead in Kerrera 

 Sound. Thirteen specimens of this fine species were taken 

 alive on loose stones on the shore at extreme low water. 

 One of these is of full dimensions, measuring 33 mm. in 

 length. It was generally noticed that, when the stone had 

 been carefully turned without disturbing the mollusk, the 

 shell was considerably raised, giving a view of the foot and 

 the margin of the mantle. The next species had the shell 

 always kept closely down. Very rare in the Clyde district 

 (Brown). 



E. fissura, L. [var. tncurva, Jeffreys]. Common alive on the 

 shore and in the dredgings on hard ground. Some of the 

 specimens obtained appear to belong to the variety incurva, 

 Jeff. 



** Puncturella noachina, L. A few examples dredged 

 alive and dead off Fraoich and Maiden Islands. Not un- 

 common in the Clyde district (Brown). 



Propilidium ancyloides, Forbes. [20 f , Jeffreys ; A.M.N.]. 

 A few live and dead specimens in the dredgings. 



Acmaea testudinalis, Mull. {Tedura testudinalis). Moder- 

 ately common on the shore ; near DunoUy Castle a speci- 

 men measuring 24 mm. in length was taken. An example 

 of the V2X. fallida^ Verk. was found near Kerrera ferry. 



A. virginea, Miill. [Forbes; A.M.N. ; dredged, very small 

 (var. conica) R.D.D. MS.]. Taken on the shore sparingly 

 but of large size, smaller specimens of more conical shape 

 dredged. Among the latter are well marked examples of 

 the vars. conica, Jeff, and elata, Jeff. 



Pilidium fulvum, M.\i\\. {Tectura fulva) . Two live and four 

 dead specimens dredged in Kerrera Sound. 



Patina pellucida, L. {Helcion pelluciduni). Taken sparingly 

 on Laminaria, in the bases of which the var. Icevis, Penn. 

 occurred. 



