EXPLANATION OF THE PLATES, 1138 
PLATE XXXIX. 
FOSSILS OF THE CARBONIFEROUS ROCKS. 
MOLLUSCA.—CONCHIFERA. 
Fie. 1.—AvicuLopecten paryracevs, Goldfuss, sp. 
Avicula, Goldf, Petr. Germ., vol. ii., p. 126, pl. exvi., fig. 5 a, 6. 
Pecten, Sow. Min. Conch., vol. iv., p. 75, pl. 354. 
Aviculopecten, Moy, Morris, Cat. Brit. Foss, 1854, p. 164. 
Original. View of right valve, reduced to two-thirds of natural size, from 
Lower Coal Measures, “ Parks Pit,” Boulea, Co. Tipperary. 
LowrER CARBONIFEROUS, CARBONIFEROUs LIMESTONE, AND Coat MEa- 
sure SuHaLes.—This very characteristic Coal Measure fossil has also 
been found as low down in the series as the Carboniferous slate, where 
it was obtained near Clonakilty, Co. Cork, by the fossil collector of the 
Geological Survey of Ireland, long ago, and identified by the author. 
Professor John Phillips also mentions its occurrence under the name of 
Pecten papyraceus in Carboniferous Limestone near Harrogate, and in 
Bolland.* It is also found in the Upper Carb. Limestone of the county 
of Dublin. Its great development is, however, in the Coal Measure 
shales, in which strata it occasionally forms matted masses, being accom- 
panied, as at the locality from which the figured fossil was obtained, by 
other marine fossils such as Goniatites, and plant fragments. It is also 
found near Castlecomer, in Ireland, and in the counties of Limerick and 
Cork. It occurs at several Coal-fields in England. Bradford, Leeds, 
and Coalbrookdale are mentioned in the Cat. of Brit. Fossils. 
Fic. 2,—AvIcULopecTEN GRANosus, Sowerby, sp. 
Pecten, Sow. Min. Conch., pl. dlxxiv., Aviculopecten, M‘Coy, Pal. Foss., 
p- 392. Morris’ Cat. Brit. Foss., 1854, p. 164. 
Original. View of right valve from Carb. Limestone (lower), near Rath- 
keale, Co. Limerick. 
CaRBONIFEROUS LIMESTONE, and SHALE.—Lower Carb. shale, near Banteer, 
Co. Cork. Carb. Limest., Bolland, counties Cork, Kildare, and Dublin. 
Fic. 3.—AvicuLopecten Swwersit, J/‘Coy, sp. 
Pecten, M‘Coy, Syn. Carb. Foss., p. 100, pl. xiv. f. 1. Amusium Megerle, 
See Brit. Pal. Foss., p. 478. 
Original. From the very perfect example showing wavy bands of colour 
markings in addition to the concentric lines of growth ; in a second speci- 
men the lines are less wavy and much narrower. The markings are of 
* Geol. Yorksh., vol. ii,, p. 213, 
