BURKILL AND MARSHALL: MARINE SHELLS OF SCILLY. 57 



Nassa incrassata var. minor JefF. — Menavawr. 



Defrancia purpurea var. philberti Mich. — MuncoyNeck. 



Pleurotoma rugulosa Phil. — Muncoy Neck. A young and 

 fresh example of this very rare shell. 



P. rufa var. lactea Jeff. — St. Mary's Sound. 



Utriculus expansus Jeff.^ — Menavawr. A most interesting 

 find. Several dead examples occurred of this very rare 

 shell. Jeffreys gives the Shetland and Lofoden Islands for 

 this species, but in addition to the Scilly locality now noted 

 I can record it from the west coast of Ireland. 



Philine scabra var. circa Marshall. — Shell having a broad 

 white band round the body-whorl, and corresponding with 

 the following variety. Dredged off Muncoy. This form 

 is rare, and I can record it from one other locality only — 

 Killala Bay, on the west coast of Ireland. 



P. catena var. zona Jeff. — Menavawr. 



P. pruinosa Clark. — St. Mary's Sound. 



Aplysia punctata Cuv. — St. Martin's Flats, between tide- 

 marks. Very fine. 



Spirialis retroversus Flem. — Menavawr, Muncoy, and St. 

 Mary's Sound. 



The Rev. R. W. J. Smart has favoured us with the 

 following unpublished additions to the Scilly List, which brings 

 the Molluscan fauna of that region up to date : — 

 Pecten opercularis var. lineata Da Costa. — Menavawr and 



St. Martin's, alive (Smart and C. Jefferys). 

 Mytilus phaseolinus Phil. — Menavawr, small but numerous 



(C. Jefferys). 

 Montacuta substriata Mont. — St. Martin's Flats and 



Pentle Bay, on spines of Spatangus purpureus, common 



(C. Jefferys). 

 Loripes lacteus L. — St. Mary's, living (C. Jefferys). 

 Scrobicularia nitida Miill. — Identified among specimens of 



S. alba submitted to Mr. Marshall. 



