110 EXPLANATION OF THE PLATES. 
PLATE XXXVIII. 
FOSSILS OF THE CARBONIFEROUS ROCKS. 
MOLLUSCA.—BRACHIOPODA. 
Fie. 1.—a, 6. Sprrirera striata, Dartin, sp. 
Anomites, striatus, Martin, Pet. Derb., pl. xxiii. 
Sptrifer Sow. Min. Conch., pl. cclxx. Spirifera striata, Day. Brit. Carb. 
Foss., p. 19, pl. ii., fig. 12, and pl. i., fig. 2, &c. 
a. From Brit. Carb. Foss., pl. ii., fig. 20; dorsal view with portion of valve 
removed, showing spiral coil. Mus. Cambridge. 
b. Original. Cast of interior, dorsal valve, Lower Carboniferous (slate), 
Farmers’-bridge, Co. Kerry. Mus. G. S. I. 
CARBONIFEROUS.—Coomhola grit to Lower Coul Measures. Abundant at 
numerous localities in England and Ireland. In Scotland, according to 
Mr. Davidson, it is extremely rare. This species is the largest spirifer 
known, and is the type of the genus. It is one of the most characteristic 
fossils of the Lower Carboniferous Limestone. Brit. Carb., Foss., p. 21. 
Fie. 2.—SpiriFeraA cusprpata, Martin, sp. 
Anomites cuspidatus, Martin, Trans. Linnean Soc., vol. iv., p. 44, pl. ii., 
fig. 1, &e. Spirifera, Sowerby, Min. Conch., pl. cexx., figs. 1, 2, 3. 
Brit. Carb. Foss., p. 44, pl. viil., figs. 19—24, pl. ix., figs. 1 and 2. 
Original. Dorsal view, showing the beak and large area, and angular fora- 
men or fissure. Carb. Limest. Adare, Co. Limerick. 
CaRBONIFEROUS LimestonE.—* This species occurs plentifully at various 
localities of the Lower Carboniferous Limestone in England as well as 
in Ireland; no Scottish example is recorded.” Davidson, Brit. Carb. 
Fossils. 
Fic. 3.—a, 6, c. ATHYRIS AmBIGUA, Sowerby, sp. 
Spirifer Sowerby, Min. Conch., vol. iv., p. 105, pl. ceclxxvi. Athyris, M‘Coy, 
Brit. Pal. Foss., p. 432. 
a,b,c. From Brit. Carb. Foss., pl. xv., figs. 17, 17 6, and 23. a. Dorsal 
view. 0. Side view. c. Dorsal view, with portion of shell removed, 
showing spiral coils, all from Carb. shales, Carluke, Lanarkshire. 
CaARBONIFEROUS.—Coomhola grit, Carboniferous slate, and Limestone.— 
This shell is not unfrequent in the Lower Carb. Limest. of England and 
Ireland; in Scotland Mr. Davidson states it to be rather common in the 
Carb. Limest. and shales of the Clydeside Basin, at Carluke, &c., Ayr- 
shire, and Berwick-on-Tweed. Brit. Pal. Foss., p. 79. 
