MARSHALL: ADDITIONS TO 'BRITISH CO^■CHOLOGY.' 255 



O. pusilla var cylindrata Marsh. Long and slender, much 

 narrower than the type. Habitat : Jersey ; Mount's Bay ; 

 Tenby ; Aberdovey ; off Southport ; Dornoch Frith. 

 O. pusilla var. minuscula Marsh. (See 'J. of C.,' Apr. 1891). 

 O. delicata Monte. This species was taken during the 'Por- 

 cupine' cruise at Bundoran, in Donegal Bay, with Ciraihts 

 striaius [Troclius dumiiiyi). 1 have since obtained it from 

 Roundstone Bay in 12 fathoms, Killala Bay, and Bundoran, 

 on the west coast of Ireland, also at Portrush, Co. Antrim. 

 It is the Chemnitzia gracilis of Philippi, but was for suffi- 

 cient reasons re-named by the Marquis de Monterosato in 

 the 'Journal de Conchyliologie' for 1874, p. 267. 

 'Distribution : Loire Infe'rieure, Gulf of Gascony, Mediter- 

 ranean, from Spezzia to Alexandria, and Adriatic, \'^ — 120 

 fathoms. Not Tui-bo gracilis of Brocchi, nor Chemnitzia gra- 

 cilis of de Koninck, fossil species of Odostomia. The colum- 

 ellar fold or tooth is sometimes observable.' — Jeffreys', in 

 'Lightning' Report. 



It is well figured in Sowerby's Index as Chemnitzia sintil- 

 lima Mont., and differs from O. lactea var. paullula in being 

 longer and more slender. See also 'B.C.,' vol. iv., p. 166, 

 under Chenaiitzia gracilis. 



O. compactilis Jeff. Described in ' British Conchology ' as 

 O. scillce var. compactilis, but in the ' Lightning ' Report 

 distinguished as a species. In originally describing the 

 shell in ' British Conchology,' Jeffreys has stated ' it may 

 be a distinct species.' Sars has since dredged it in Nor- 

 way, and named it Euliviella compactilis. 

 O. ventricosa Forbes. Described in 'British Conchology' 

 as O. acicula var. ventricosa. In the ' Lightning ' Report 

 Jeffreys has raised it to the rank of a species in deference 

 to the opinions of adverse critics. He says it ' has a more 

 delicate texture, the whorls are more swollen and the 

 suture consequently deeper, and the apex is more attenu- 

 ated.' Besides having a sharper apex the base is broader. 



