Quaiierly Journal of ConcJioIogy. 321 



A LIST OF SHELLS TAKEN AT GUERNSEY, SARK, 

 AND HERM,-* IN SEPTEMBER, 1877. 



By A. II. Cooke, of King's Colkgc, 

 And H. M. GwATKiN, M.A., of St. John's College, Cambridge. 



[Note. — Where ihe panicular island is not specified, Cueinscy is always 

 referred to.] 



PisiDiUM NiTiDUM,yc.'//;7/j-. Wct ground in a meadow near Cobo; 

 common. 



PisiDiUM ROSEUM, Scho'iz. In a small pond by the roadside, 

 near the harbour at Sark ; not common. 



Hydrobia ventrosa, Mont., var. eloxgata. Arnold's pond ; very 

 abundant and fine. 



Planorpis spirorbis, Z. Dry ponds near Mt. Crcvel Tov. er, 

 and ditches near Cobo ; common. Very abundant near Ivy 

 Castle, 



Plaxorbis vortex, Z. Only a few specimens in small ditches 

 at Cobo. 



LiMN.^A peregra, Mil!'., var. submakitima. Generally distributed 

 in poads and ditches near ihe sea shore, at Guernsy only ; 

 always dwarfed. It does not i.eem to occu/ at Sark. 



Li.mx/EA palustris, Milll. Small streams and ditches through- 

 out Guernsey, eg., Fermain Bay, 'i'he Vale, &c. Not very 

 common. 



LiMN/EA truxca'jUla, JZ/V//. l)itches at Cobo ; rare* 



Limx^a glabra, Milll. In pitches near h y Castle ; con.mon, 



* Ourbearch at : ark and Herm only lasted about three days at each. 



