124 Part IIT.—Fifteenth Annual Report 
antly at extreme low water in Upper Loch Fyne (M.). In 10 fathoms, 
off Silvercraigs, in stony and shelly ground—youug live specimens only 
(Alf. Brown). 
Pecten tigrinus, O. F. Miiller—Not uncommon off Battle Isiand 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, O. 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 (Linné).—A few off Skate Island in 14 fathoms, and in 
East Loch Tarbert (B. & 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-lutre (Linné), (= 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. & S8.). 
The variety albus, Jeff., is not very rare in Loch Fyne; perhaps one 
in every fifty belongs to this variety (M.). 
The variety Dumaszi, Payr., has been taken in Upper Loch Fyne in 
70 fathoms (M.). 
Pecten opercularis (Linné).—Common in the neighbourhood of Tarbert 
(B. & 8.). 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, Linné.—Found at the heads of all the Clyde lochs. 
This is a widely distributed species both in the northern and 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 (Linné).—Common in the neighbourhood of East 
Loch Tarbert (B. &8.). 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 
