GLACIAL GRAVELS AT GLOPPA. 



91 



Appendix. 

 List of MoUusca, etc., from the Gloppa Drift. 



N.B. — In the first column I have noted the occurrences at Gloppa ; in the 

 second column are given the species recorded at Moel Tryfaen (see W. Shone's 

 paper, Quart. Journ. Geol. Soc. vol. xxxiv. (1878) p. 394). 



I have indicated in the third column the occurrences of the various species 

 now living in Liverpool Bay {vide ' Fauna of Liverpool Bay,' Eeport 1 (18S6), 

 pp. 247-266, Liverpool Marine Biology Committee). 



The letters v. r. mean that 1 to 3 specimens have occurred ; r., 3 to 10 ; 

 f., frequent ; c, common ; a., abundant. 



1. Arctic and Scandinavian species not 

 living in British seas. 



Leda pernula, Miiller 



Astarte borealis, Chemnitz 



„ crehricostata, F'orbes 



Denialium ahyssorum, Sars 



Natica affinis, Gmelin 



Tellina ccdcarea (T. proxima, 'Brown) 



Cardium grmnlo.ndicum (Chemnitz) ^ 



Pleurotoma pyramidalis, Stimpson 



Trophon clathratus, Linn 



„ „ var. scalar if or mis, Gould 



„ „ var. Gunneri, Loven .. 



2. Northern type of British species which 



inhabit Arctic and Scandinavian seas in 

 common with our own. 



Mytilus modiolus, Linn 



Lacuna crassior, Montagu 



„ divaricata, Fabrici us 



Cyprina islandica, Linn 



Astarte compressa, Mont 



Buccinum undatum, Linn 



Trophon clathratus, Linn., var. truncatiis ... 



Pleurotoma rufa, Mont. 



„ turricula, Mont 



Sipho {Fusus) gracilis, Da Costa 



Puncturella Noachina, Linn, (one specimen 

 only) , 



3. Southern type of British species which 



inhabit more southern seas in common 

 with our own. 



Area lactea, Linn. (2 specimens) 



Cyiherea chione, Linn, (several well-preserved 

 hinge-fragments) 



Gloppa. 



r. 



r. 



c. 



c. 



V. r. 



V. r 



r. 



V. r. 



r. 



r. 



V. r. 

 9 



r. 



? 

 f. 

 r. 

 r. 



V. r. 



f. 

 f. 

 f. 



V. r. 



V. 



Moel 

 Tryfaen. 



Liver- 

 pool Bay 



r. 



V. r. 



c. 



V. r. 





e. 



... 



V. r. 



a. 



0. 



f. 

 f. 



c. 

 c. 

 f. 

 f. 



r. 



c. 

 r. 



V. r. 



f. 



V. r. 

 f. 



c. 

 c. 



V. r. 



V. r. 



c. 



V. r. 



One specimen only found, which is probably Cardium grcanlandicum. 



