SMa.lRt AND COOKE : MARINE SHELLS OF SCILLY. 297 



R. vitrea Mont. — Dead specimens only from Crow Sound, 



common. 

 R. cingillus Mont. — On weed in trawl refuse from shallow 



water, and under stones on the shore. 

 Barleeia rubra Ads. — Deep water dredgings, never living, fairly 



common. 

 Turritella terebra L. — Living, in muddy sand, Crow Sound; 



sometimes thrown up on a beach at the west of Bryher. 

 T. terebra var. nivea L. — Dredged with the type. 

 Scalaria Turtonae Turt. — A fragment only, dredged out- 

 side Menavawr. 

 S. communis Lam. — Living on gravelly sand at low water 



mark, Cheese Rock, and occasionally thrown up dead on 



all the beaches. ^ 



S. clathratula Adams. — From the Menavawr dredgings; 



also has been obtained thrown up on the shore, never 



alive. 

 Odostomia clavula Love'n. 

 O. pallida Mont. 

 O. conoidea Brocchi. 

 O. conspicua Alder. 

 O. unidentata Mont. 

 O. turrita Hanley. 

 O, insculpta Mont. 

 O. decussata Mont. 

 O. indistincta Mont. 

 O. interstincta Mont. 

 O. spiralis Mont. 

 O. excavata Phil. 

 O. scalaris var. rufescens Phil. 

 O. lactea L. 

 O. acicula Phil. 



All the preceeding species of Odostomia were found in 



the Menavawr dredgings ; none being common, some 



represented by only a single specimen. The more critical 



