XVI PROCEKDINGS OF THE 



diagrams and prepai'ations sliowing the structure of the electric 

 organ in various fishes, and its development from muscular 

 tissue. The meeting was presided over by Sir Michael Connal, 

 and at the close some interesting remarks were made by Professor 

 John G. M'Kendrick, M.D., LL.D., F.R.S., on the electric organs 

 regarded from a phj-siological point of view. 



Sir George H. Leith-Buchanan, Bart., Corresponding Member, 

 sent for exhibition an immature female specimen of the Long- 

 tailed Duck, narelda glacial is, L., from Loch Lomond. 

 Specimens, lent by Mr. Henry Martin, of the male and female 

 birds in adult plumage, were also exhibited ; and remarks on 

 the species and its habits wei-e made by Mr. James Barrie 

 Low, M.A., and others. 



The Chairman (Mr. Somervillef made some remarks on the 

 food of Harelda and other allied birds. This, he stated, was 

 generally found to consist largely of MoUusca, the three species 

 most frequently found in the stomachs of the birds being 

 Mytiliis edulis, L.. Helcio)i pellucidum, L., and Lacuna divari- 

 cata, Fabr., although others of much greater rarity have 

 occasionally been met with. Specimens of the three species 

 referred to were submitted by Mr. Somerville for examination. 



On behalf of Mr. Henry M'Culloch, Mr. James Steel exhibited 

 an albino example of the Missel Thrush {Tardus viscivorus) 

 from Sligo, and stated that although albino Blackbirds are not 

 unfrequently met with, such varieties of the Missel Thrush are 

 of much rarer occurrence. 



Mr. Thomas Scott, Corresponding Member, submitted a series 

 of specimens of Porcellio pichis, Brandt & Ratzeburg, an 

 isopod crustacean found by him at Seafield, Leith. Mr. James 

 Steel, by whom the specimens were exhibited, stated that Mr. 

 Scott had also obtained this species in Bute and on the shores 

 of the Cromarty Firth, so that its distx'ibution throughout 

 Scotland appeared to be fairly wide, although no previous 

 evidence of its occurrence north of the border had apparently 

 been placed on record. 



Mr. D. A. Boyd stated that Porcellio i^ictus is abundant in 

 the neighbourhood of West Kilbride, where it frequents rather 

 dry spots, such as under slates on roofs, etc. 



Mr. Steel showed specimens of Philoscia muscorum. Scop., 

 an isopod crustacean obtained in Shielhill Glen, near Greenock, 

 by Mr. Andrew Scott. 



He also exhibited a specimen of the tail of the Spotted 

 Sting-Ray, Trygon iinriiak, Forsk., from China. This fish 

 belongs to the sub-order Batoidei, in which, along with the 

 rays and skates, is included the family Trygonidae, well illus- 

 trated by the species under notice. The Sting-Rays are 

 remarkable for the comparative length and great flexibility of 



