Molhshs, 7205 



the south-east of Clachland Point, this beautiful little shell may be 

 met with in some abundance. If the right ground be hit upon, the 

 dredge will come up filled with stones, mixed with perfectly black and 

 thoroughly rotten shells of Peclen opercularis. If the dredger suc- 

 ceeds in finding this ground, he will be upon the most productive 

 spot in the whole district of the Firth of Clyde. The careful exami- 

 nation of the stones and Pecten shells from this locality has given me, 

 among many others, the following shells, several of which do not 

 occur elsewhere in the district: — Astarte sulcata, Pecten tigrinus, 

 P. striatus and P. similis, Terebratula Caput-Serpentis, Crania anomala, 

 Pilidium fulvum, Puncturella noachina. Bulla Cranchii, Mangelia 

 septangularis and P. teres, Trichotropis borealis, &c. Varieties of 

 the Pilidium sometimes occur, having a pale ground marked with 

 brilliant orange rays, while others, which are very rare, are wholly 

 yellowish white. 



Propilidium alcyloide {Patella alcyloides) is another of the shells 

 originally described as British from the Clyde. It " was added," write 

 Forbes and Hauley, " to the British Fauna by Mr. Smith, of Jordan 

 Hill, and one of the authors of this work, when dredging in Lamlash 

 Bay, in 1839." "Two specimens, dredged alive off Ballantrae, Ayr- 

 shire, in 1842, were sent me by Mr. Edward Getty. Dead shells are 

 not uncommon among comminuted nullipores dredged in Lamlash 

 Bay, Arran, in 1846, by Major Martin and the Rev. David Lands- 

 borough," W. Thompson. Notwithstanding this assertion that it is 

 "not uncommon" I have never had the good fortune to meet with the 

 species, although I have examined bushels of " comminuted nulli- 

 pores" from the little Bay, now known to the boatmen as "Lands- 

 borough's Bay," on accountof Dr. Landsborough having so frequently 

 dredged there for this comminuted nullipore, which abounds in minute 

 shells, many of them very rare species. Unfortunately the specimens 

 are for the most part very much worn, and of little value for the 

 cabinet. 



Fam. III. Dentaliadce. 



Dentaliura entalis. May be found in most suitable situations, — 

 namely where the water is deep and the bottom mud. Abundant 

 outside Kames Bay, Cumbrae. 



Fam. IV. CalyptroiadcB. 



Pileopsis hungaricus {Capulus hungaricus). Not common, and 

 always small. Its range is from low water to twenty fathoms. 



