178 TRANSACTIONS, NATURAL HISTORY SOCIETY OK (.LASGOW. 



List of Species, including also some Varieties, of 



MOLLUSCA observed IN THE ISLAND OF BUTE. 



The arrangement and nomenclature of Jeflfi-eys' British Con- 

 chology are followed. 



ConchifeTa. 



Sph^riid^. 



Pisidiujyi fonthuile (Drapernaiid). — Loch Fad ; frequent. 



,, ptcsilluTn (Gmelin). — Loch Fad, Loch Ascog, and other 



places. 

 ,, nitiduni, Jenyns. — Loch Fad ; frequent. 



Gasteropoda. 



LlMNJEID^S:. 



Planorbis nautileus (Linn^). — Loch Ascog, Greenan Loch. 

 ,, var. alba, mihi. — Loch Ascog ; rare. 



albus, Miiller. — Loch Fad, Greenan Loch. • 

 glaber, Jeffi^eys (P. parvus Say). — Greenan Loch. 

 spirorbis, Miiller. — Small loch or pond near Ascog. 

 contortus (Linn^). — Loch Fad, Greenan Loch. 



Physa fontinalis (Linn^).— Side of Loch Fad. 



LimncBa peregra (Miiller). — Common in ditclic- and lochs. 



,, palustris (Miiller). — Marshy gromid at the west end 



of Greenan Loch. 

 „ truncatula (Miiller). — Frequent in ditches and lochs. 



Ancylus fluviatilis, Miiller. — Loch Fad, Loch Ascog. 



LiMACIDiE. 



Arion ater (Linn^). — Common. 



Limax gagates, Drapernaud. — Frequent in a garden near the 



Aquarium. 

 ,, onarginatxut, Miiller. — Not very common in the vicinity 



of the Aquarium. 

 „ agrestis, Linn^. — Common. 

 ,, arborum, Bouchard-Chantei*eaux. — Frequent; vicinity of 



the Aquarium, near Loch Fad. and on beech trees 



west of Rothesay. 

 ,, maximus, Linn^. — Vicinity of the Aquarium, among 



herbage on the shore at Ettrick Bay, and other 



places. 

 „ kevis, Miiller. — Frequent in damp situations under stones ; 



shore of Loch Fad, and other places. 



