"378 TRAXSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



of the Mollusca would suspect that the soft body 

 of the Lamellaria had an internal spiral shell to 

 protect its vital organs." * It has been recorded 

 from Cuinbrae. 



Pleurobranchus plumula, Montagu.— I have as yet 

 got only one specimen of this species under a stone 

 at extreme low water on the north shore of East 

 Loch Tarbert, nearly opiDosite the "Columba" Wharf. 

 It was of a fine lemon yellow colour, and nearly two 

 inches long. At a meeting of the Society on 26th 

 April, 1870, Mr. Robertson remarked, in reference to 

 the occurrence of this species at Cumbrae, that 

 " driring that month he had procured three or four 

 specimens from the fishermen of Cumbrae, who had 

 found them adhering to their lines, brought nj) from 

 deep water. Previously he had looked upon the 

 species as rare in that locality, having only obtained 

 two specimens in all his experience there." f Di*. 

 Jeffreys describes it as " local and not common." 



Xylophaga dorsalis, Turton.— I occasionally get 

 this curious and destructive mollusc in East Loch 

 Tarbert. From a small piece of wood brought up 

 by the dredge, and measuring about seven inches in 

 length and one in diameter, I took fully 250 living 

 specimens, large and small. Another small piece of 

 wood with dead shells was brought np by the dredge 

 in Lochfyne. This species has been recorded from 

 Lochfyne by M'Andrew, and from the Docks, 

 Ardrossan, Ayrshire, by Martin. 



In conclusion, I wish to record my indebtedness 

 to the Rev. Canon Alfred M. Norman, F.L.S., &c., 

 for his kind assistance in identifying certain species, 

 and for valuable information connected therewith ; 

 and to Mr. Richard M'Kay for supj)lying me with 

 notes from the first and second volumes of the 

 Society's Proceedings, bearing on some of the lower 

 forms of Crustacea mentioned in this pajDer. 



* Jeffreys, British Conchology, iv. 234. 



t Proceedings, Nat. Hist. Soc Glasg., ii. 32. 



