138 PAPEKS, ETC. 



Bath. — Mr, Clark. Weston-super-Mare and Taunton. — 

 Kev. W. K. Crotch. 



Farn. LILLORINIDiE. 

 Genus EissOA. Fremenville. 



R. ventrosa, Montagu. In marvellous abundance in a 

 ditch near the Pill, Clevedon, the water of which is bat 

 yery sllghtlj impregnated witli salt. 



M. subumbüicata, Montagu. Eissoa ulv«, var., Forbes 

 and Hanley, vol. viii., p. 142. This species (?) [vide 

 Jeffreys in Ann. and Mag. Nat. Hist., tliird series, vol. viii., 

 (1859) p. 180] is very abundant on the mud flats, and at 

 river-moutlis all along tbe coast of Somerset. 



We have not met with the true ßissoa ulvte in the 

 county. These tvvo species of the genus Eissoa, belonging 

 to the Hydrobia section, have been admittcd into this 

 catalogue becaute they hold a doubtful position between 

 the artificially divided Fluviatile and Marine mollusca. 



Div. PULMONIFERA. 



Fam. LIMACID^. 

 Genus Arion. Fcrussac. 



A. empiricorum, Ferussac. On the low grounds and in 

 damp situations this Arion is always black ; in drier situa- 

 tions, hills, and woods, it varies greatly in colour. 



A. ßavus, Müller. We have taken an Arion, which we 

 believe to have been this species, among the ruins of 

 Walton old church, and likewise in Brockley Coombe. 



A. hortensis, Ferussac. Common in gardens, on hedge- 

 banks, and in fields. 



