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Part III. — Fifteenth Annual Report 



antly at extreme low water in Upper Loch Fyne (M.). In 10 fathoms, 

 off Silvercraigs, in stony and shelly ground — young live specimens only 

 (Alt'. Brown). 



Pecten tigrinus, 0. F. Miiller. — Not uncommon off Battle Island in 40 

 fathoms, both the typical form and the variety costatus, Jeff. (B. & S.). 

 In Upper Loch Fyne at Minard Narrows, and at both sides, in 10 to 30 

 fathoms (M.). 



Pecten striatus, 0. F. Miiller. — Furlong Bay and Moll Dhu Point, 

 not common (B. & S.). Upper Loch Fyne at Minard Narrows, at both 

 sides and in the centre, and also near the head of the loch, in 10 to 30 

 fathoms (M.). 



Pecten pusio (Linne). — A few off Skate Island in 14 fathoms, and in 

 East Loch Tarbert (B. <fc S.). Upper Loch Fyne at Minard Narrows, and 

 on the east side in 10 to 25 fathoms, as well as also between tide marks 

 (M.). 



Pecten pes-lutrce (Linne), ( = Pecten septemradiatus, Miiller). — Com- 

 mon in Upper Loch Fyne in the deepest water, where also the largest 

 specimens are found. Very large and fine specimens were taken below 

 Strachur — much finer than towards the head of the loch — the specimens 

 procured towards the head of the loch in about 10 fathoms, and at 

 Minard Narrows, being .smaller than those from the deep water. All the 

 specimens taken in a haul off Skate Island in 104 fathoms were dead. 

 In deep water the shells are always associated with much manganese (M.). 

 Plentiful in deep water off Skate Island (B. & S.). 



The variety albus, Jeff., is not very rare in Loch Fyne ; perhaps one 

 in every fifty belongs to this variety (M.). 



The variety Dumasii, Payr., has been taken in Upper Loch Fyne in 

 70 fathoms (M.). 



Pecten opercularis (Linne). — Common in the neighbourhood of Tarbert 

 (B. & S.). Upper Loch Fyne at Minard Narrows ; at both sides and in 

 the centre, and also near the head in 10 to 70 fathoms ; and also on the 

 shore between tide marks (M.). At Moll Dhu and Silvercraigs (Alf. 

 Brown). 



Pecten similis, Laskey. — Dredged at Tarbert Bank, Loch Fyne (Mihi). 

 A local and gregarious species, Moll Dhu, Loch Fyne (Alf. Brown). The 

 fry of Pecten maximus are liable to be mistaken for this species by those 

 who have not had an opportunity of seeing both forms. 



Mytilus edulis, Linne. — Found at the heads of all the Clyde lochs. 

 This is a widely distributed species both in the northern aud southern 

 hemispheres ; it has been recorded from Rio de la Plata, Falkland, and 

 Kerguelen Islands, and from New Zealand (M.). There is an extensive 

 bed of Mytilus edulis at Ardrishaig (Alf. Brown). 



Modiola modiolus (Linne). — Common in the neighbourhood of East 

 Loch Tarbert (B. & S.). Abundant at extreme low water in all the Clyde 

 lochs, also at Minard Narrows, and at both sides of Upper Loch Fyne in 

 10 to 30 fathoms (M.). 



Modiolaria marmorata (Forbes). — Common ; usually found embedded 



