Molliisks. 7203 



To this report it will be known that I refer when I attach the names 

 *'Greville and Miles" to any locality or note. The Committee again 

 pursued their investigations in 1857, and during the autumn of that 

 year I was myself at Lamlash for a few days' dredging, and had the 

 pleasure of meeting Professor Balfour, the only member of the Com- 

 mittee then left upon the island.) 



Class III. PTEROPODA. 

 Fam. II. Limacinidce. 



Spirialis Flemingii {Fusus reiroversus, Peracle Flemingiif Crania 

 Flemingii ? misprint). Mentioned by Dr. Landsborough as found at 

 Lamlash. 



Class IV. GASTEROPODA. 

 Div. I. Prosobranchiata. 

 Fam. I. Chitonidce. 

 Chiton fascicularis. Under stones at extreme low-water mark in 

 Balloch Bay, Cumbrae, and at the outer Allans, also at Lamlash. 



C. ruber. Uncommon ; occasionally dredged attached to stones 

 near Tan Buoy, Cumbrae, and between Clachland Point and Holy 

 Island. Ayr, Smith. 



C. cinereus {Chiton marginatus. Chiton fuscus) . Abundant under 

 stones between tide-marks, but not richly coloured ; large specimens 

 may be taken at the northern extremity of Fintry Bay, Cumbrae. 



C. Asellus {Chiton cinereus ?). Abundant in deep water attached 

 to shells and stones. Full-grown specimens from the Clyde are 

 always clothed with a black incrustation. 



B. laevis. Rare, and always small, not much exceeding half an 

 inch. I have taken it at low water, and with the dredge down to 

 twenty fathoms. 



C. marmoreus {Chiton Icsvigatus). Bute, Smith. Occasionally off 

 the Tan Buoy, Cumbrae, and also within and outside Lamlash Bay. 

 Mr. Alder's cabinet contains a fine series from Rothesay Bay. 



Fam. II. Patellidce. 

 Patella athletica. Mentioned by Dr. Landsborough. I have not 

 met with it. 



*P. vulgata. Common, of course, but not so abundant as usual. A 

 pretty variety is found at Scolag, in Bute, low-spired and strongly 

 ribbed. This is a form that I have never observed elsewhere. It will 



