3IO CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 



Dosinia exoleta, L. {Venus exokAt). [R.D.D.]. Large dead 

 specimens on Coram Ledge. 



D. lincta, Pult. A few dredged alive and dead. 



Venus casina, L. Large valves and young live examples 

 dredged. 



V. gal Una, L. Alive on shore in Oban Bay. Dead on a 

 sandy beach past DunoUy. 



V. ovata, Penn. Abundant in all the dredgings on hard 

 ground. J\Lany are of large size. 



V. fasciata, Da Costa. [A.ALN. ; frequent but not brightly 

 coloured, R.D.D. MS.]. Valves only dredged. 



Lucinopsis undata, Penn. Valves dredged. 



Cryptodon flexuosus, Mont. {A\iiiiisJIe.\iiosiis). Dredged 

 alive and dead very sparingly, 



** C. ferruginosus, Forbes. Liimature examples, most ot 

 them quite unencrusted, dredged alive. 



Donax vittatus, Da Costa. [R.D.D.]. A few young shells. 



Psamnnobia ferroensis, Chem. Dead specimens on the 

 beach at Kerrera Island. 



P. tellinella, Lamk. [A.ISLN. ; frequent and rarely living, 

 R.D.D. MS.]. Broken valves and young live specimens 

 dredged. 



** Solecurtus antiquatus, Pult. Valves only dredged in 

 Kerrera Sound. 



Solen siliqua, L. [R.D.D.]. The var. anuata, Jeff, found 

 dead on the shore near DunoUy. 

 * S. ensis, L. In our experience this species merges by 



imperceptible gradations into the foregoing. 

 -^ S. pellucidus, Penn. [A.M.N. ; R.D.D. MS.]. 



Mactra solida, L. A valve of the var. truncate, Mont, on the 

 shore near DunoUy. The var. elliptica, Lamk. was dredged 

 alive and dead. We must confess that it is with consider- 

 able hesitation that v>'e retain this in the varietal position 

 to which Jeffreys consigned it. Although specimens from 

 Kerry much thicker than usual have come under our 



J.C., vii., Jan. 1S94. 



