4422 Mollusks. 



Transparent or Smooth Limpet, Patella pellucida, (also P. Icevis, 

 Flem. and Mac.) Common, in both varieties. 



Tortoise-shell Limpet, Acmcea tesiitudinalis. This, when cleaned, 

 is a very pretty little limpet, and well deserves its specific title. It 

 has hitherto been reckoned among the scarcer British shells. Its re- 

 cent discovery in several localities, together with its abundance in the 

 Moray Firth, from Stotfield to Burghead, has inclined some to think 

 that there has lately been some extraordinary increase or a southerly 

 migration of the species, while others suppose that it has been over- 

 looked as the young of the common limpet. 



Virgin Limpet, Acmcea virginea, (Patella virginea, Flem. ; Lottia 

 virginea, Mac.) Not uncommon in the Firth. Mr. Murray has pre- 

 sented some fine specimens, collected at Burghead, to the Elgin 

 Museum. Frequent in shell-sand, Portsoy. 



Tawny Limpet, Pilidium fulvum. " In thirty fathoms, twenty 

 miles north of Kennard's Head, Aberdeenshire (Thomas)," F. fy M. 

 One specimen in Edward's collection, March, 1854. 



Common Tooth-shell, Denlalium entalis. Common. 



Hungarian Fool's-cap, Pileopsis Hungaricus {Capulus Hungaricus, 

 Flem. and Mac. ; also C. militaris, Mac.) Two specimens have been 

 found by Mr. Murray on the fishermen's lines at Burghead, and two 

 more have since been discovered by Mr. Macdonald among shells sent 

 to him from Buckie. Occasionally in shell-sand. Also in Edward's 

 collection. 



Net-worked Fissurella, Fissurella reticulata (F. Grceca and aper- 

 tura, Flem.) Three specimens were obtained from shell-sand col- 

 lected on the South-eastern coasts of Caithness, and obligingly 

 forwarded by the Rev. Mr. Whyte, of Canisby. 



Noah's Chink-Limpet, Puncturella Noachina, (Rimula Flem- 

 ingii, Mac.) "In sixty fathoms, Troup Head, (Thomas)," 

 F.SfH. 



Common Slit- Limpet, Emarginula reticulata, (E. jissura, Flem. 

 and Mac. ; also E. curvirostra, Mac.) Has been frequently met with 

 at the different fishing villages of the Moray Firth. 



Jujube Pyramid-Shell, Trochus zizyphinus (also Z. conuloides, Mac.) 

 Common. The authors of the ' History of British JVfollusca, p. 491, 

 vol. ii., notice the late Dr. Macgillivray's specific name " Sisyphinus," 

 and his derivation of this term (' Mollusca of Aberdeenshire,' p. 53) 

 from some fancied analogy to the rolling-stone of Sisyphus ; but they 

 do not seem to have observed his correction of this spelling and deri- 

 vation given in an after part of his volume (p. 349), where he says, 



