52 ANNALS OF SCOTTISH NATURAL HISTORY 



end of May 1899, which is in perfect condition, being preserved in 

 diluted alcohol. 



It measures just 9^ inches long. The colour, which has not 

 undergone any change, may be roughly described as a warm brown. 

 It could not by any stretch of imagination be called red, although I 

 daresay it is redder than the common adult forms. ALBERT F. 

 ROSA, Edinburgh. 



Mollusea observed at Stromness, Orkney. The following is a 

 list of some land and fresh-water shells collected in the neighbour- 

 hood of Stromness, Mainland, Orkney, during the first week of Sep- 

 tember 1902. All except two, namely, JV. fluviatilis and V. pellu- 

 cida, are new to the list for Orkney ; and they have in all cases been 

 identified by Mr. J. VV. Taylor, to whom the discovery of H. 

 radiatula among specimens forwarded is also due. 



Neretina fluviatilis. Stennis Loch. Still abundant in this old 

 habitat and in comparatively salt water. All my specimens were 

 taken from stones among seaweed between Bridge of Waith and 

 Deepdale. The round, opaque, whitish egg capsules were attached 

 to the shells in many cases ; also seen crowding the cracks in 

 rows. 



Lhnncea peregra. Small field-drain entering sea about \ mile 

 south-west of town. A few found. 



L. truncatula. Common. In several burns and drains into 

 Stennis and Bay of Ireland. 



Ancylus fluviatilis. - - One. Small burn south side Bay of 

 Ireland. 



Succinea putris. - - One. Roadside - drain, where road from 

 Stromness meets loch at Deepdale. 



Vitrina pellucida. Common south-west of town near shore. In 

 company with P. cylindracea. 



Hyalinia cellaria, var. albino,. Found in company with the fore- 

 going. Also at loch, end of old road to Stennis. 



H. alliaria. A few under stones near Bridge of Waith. 



H. radiatula. One. Near town. 



H. crystallina. Several south-west of town near shore. 



P. cylindracea. By far the most abundant land shell met with. 

 Occurred in all directions, but on stones near the shore was in 

 colonies, twenty to forty individuals. Three distinct types occur : 

 (i) P. cyl. normal, (2) var. edeutula, (3) var. curta. There are 

 other slight variations in size of denticle, but the edentulous are far 

 the most numerous. 



Vertigo pygm&a. - - Where road skirts south end of Stennis. 

 Apparently common. Twenty-one taken. 



Cochlicopa lubrica, var. lubricoides. A few near shore, south- 

 west of town. 



