THE GEOLOGY OF PUFFIN ISLAND. 83 
Before leaving the Carboniferous limestone it may be 
as well to attempt to assign the Puffin limestone to its 
definite horizon in that formation. Mr. G. H. Morton 
has divided* the series into the following beds, lower 
brown limestone, lower white limestone, upper white 
limestone, upper grey limestone, and the fossils of his lists 
indicate that this belongs mainly to the upper grey lime- 
stone, though the upper white limestone is probably also 
represented. Mr. Etheridge has recorded the following 
fossils from Puffin Island in Ramsay’s ‘‘ Geology of North 
Wales.”’ + 
Productus giganteus. Glauconome. 
e cora. Lithostrotion irregulare. 
Spirifera striata. a junceum. 
- clabra. - (Lonsdalia) floriforme. 
Athyris. Syringopora ramulosa. 
Fenestella. 
To this list I am able to add the following :— 
Campophyllum giganteum, M‘Coy (Zaphrentis cylin- 
drica, Scouler). 
Amplexus coralloides, Sow. 
Lithostrotion martini, Edw. and Haime. 
a . cespitosum, Martin. 
*Cyathophyllum stutchburyi, Edw. and Haime. 
*Cyclophyllum fungites, Flem. 
Lonsdalia floriformis, Flem. Zaphrentoid stage. 
Syringopora reticulata, Phil. 
A geniculata, Phil. 
*Chetetes radians, Fischer. 
*Monticulipora (Heterotrypa) tumida, Phil. 
*Platycrinus trigintadactylus, Aust. 
* Proc. of Liv. Geol. Soc., vol. iii, pp. 176 to 190. 
+ Mem. Geol. Surv., vol. iii., 2nd edit., p. 259. 
