5880 



Mollus/is, 



Millport Bay ; at least thirty single valves may be taken to every 

 perfect specimen. 



Fam. XVI. Kellladcc. 



Montacuta ferruginosa. 1 have met with a few fine examples 

 thrown up on the sand at Millport Bay after gales from the West, 

 having the animal still in them. It has likewise been taken by Mr. 

 Alder and Dr. Landsborough in Lamlash Bay. 



„ bidentata. Occurs occasionally in rock-pools, as for 

 example at the outer Allans, Cumbrae ; and Clachland Point, Ar- 

 ran. It likewise may be found sparingly among Lamlash Bay shell- 

 sand. 



„ substriata. Fourteen examples fell to my lot from the 

 spines of Spatangus purpureus taken off the west coast of Cumbrae. 

 Dr. Landsborough several times met with it in Lamlash Bay (Lands. 

 Excurs. pp. 195 and 322). 



Turtonia minuta [Montacuta purpurea). By no means rare in 

 rock-pools, if the Corallina be gathered and washed, and the sediment 

 examined. The Allans, Cumbrae ; and Clachland Point, Arran, 

 afford it in some plenty. 



*Kellia suborbicularis [Mya suhorhicularis). Distributed through- 

 out the district. The best situations to look for it in are the interiors 

 * of old dead bivalve shells filled with mud. The young may be taken 

 occasionally in rock-pools. 



5, rubra. Common, though somewhat local. Abundant 

 among Balani which clothe the rocks just north of Fintry Bay, Cum- 

 brae ; and frequent in rock-pools, among Corallina officinalis and Li- 

 china pygmaea, at Clachland Point, Arran. A white variety occurs 

 in this last locality. 



Lepton convexum. Lamlash, Landsborough. 



„ nitidum. Mr. Webster has informed me that among a 

 small quantity of Lamlash Bay shell-sand which I sent him he met 

 with a single example of Lepton nitidum. 



Fam. XVII. Myiilidw. 



*My tills edulis (My tilts pellucidus). Abundant in the Clyde above 

 Greenock, but further down it is by no means so, specimens being 

 few and far between. 



*Modiola modiolus (Modiola vulgaris). Frequently taken both at 

 low water and with the dredge, but full-grown specimens are scarce, 

 and I am not aware of any locality in which it occurs gregariously. 



