BTJRKILL AND MARSHALL: MARINE SHELLS OF SCILLY. 347 



and Muncoy, 30-40 fathoms. Several examples were 

 obtained in the dredgings of 1888. 



R. punctura var. diversajeff. — Menavawr and St. Mary's 

 Sound. 



R. parva var. exilis Jeff.— St. Mary's Sound. 



R. fulgida Adams. — St. Mary's Sound, dredged dead. 



R. cingillus var. rupestris Forb. — St. Mary's Sound, shore. 



Jeffreysia opalina Jeff. — St. Mary's Sound, dredged dead. 



Homalogyra rota F. & H.— St. Mary's Sound. 



H. atomus Phil. — St. Mary's Sound. 



Aclis gulsonae var. tenuicula Jeff — Menavawr. 



Odostomia warren! Thomp.— Menavawr and St. Mary's 

 Sound. 



O. turrita var. nana Jeff. — Menavawr and St. Mary's Sound. 



O. insculpta var. laevissima Sars.— St. Mary's Sound. 



O. spiralis var. coarctata Marsh., n.v. — Shell nearly 

 cylindrical, in consequence of having a narrower base, 

 and the last whorl not projecting beyond the penultimate 

 one, with a deeper suture. It is analogous to O. inter- 

 siincta var. suturalis. Occurs occasionally with the type, 

 but is rare. 



O. pusilla var. minuscula Marsh., n.v. — Shell a miniature of 

 the type, and corresponding to the dwarf form of O. lactea. 

 I have this variety from Jersey,. Torbay, Southport, Bar- 

 mouth and Aberdovey in Wales, and from Skegness. ' Mr. 

 Stanley Cox has also dredged it off Teignmouth, and 

 Mr. Sturges Dodd at Connemara. It has probably been 

 hitherto overlooked. 



O. acicula var. turris Jeff.— Muncoy, INIenavawr, and St. 

 Mary's. Found with the type. This form appears to take 

 the place of O. ve?iiricosa, which does not seem to occur at 

 Scilly. 



O. nltldisslma Mont. — St. Mary's Sound. 



