EXPLANATION OF THE PLATES. 111 
Fic. 4.—a, 6. OrTuis resurinata, Dartin, sp. 
Anomites, Martin, Pet. Derb., pl. xlix., figs. 13, 14. Orthis, De Kon. Anim. 
Foss. Belg., pl. xii., fig. 9. Brit. Carb. Brach., p. 130, pl. xxix., figs. 
i—6, pl. xxx., figs. 1—8. 
Original. a. Dorsal view. 6. Side view. Carb. Limest. Millecent, Co. 
Kildare. 
CARBONIFEROUS LIMESTONE and sHALE, A common, well-known, and widely 
spread Carboniferous shell; in England it abounds in the Carb. Limest. 
and shales of many localities ; it is also frequent in the Isle of Man, in 
Scotland and Ireland. 
Fic. 5.—a, 6, c. Propuctus semrreticutatus, Martin. sp. 
Anomites, Mart. Pet. Derb., pl. xxxii., figs. 1, 2, and pl. xxxiii., fig. 4. 
Productus Martini, De Kon. Carb. Foss. Belg., pl. vii., fig. 2. P. semi- 
reticulatus, De Kon. Mon. Prod., pl. viii., fig. 1, and pl. ix., fig. 1. Brit. 
Carb. Foss., p. 149, pl. xlii., figs. 1—11, pl. xliv., figs. 1—4. 
a. Dorsal view, from Brit. Carb. Foss., pl. xliii., fig. 2 a. 
b. Original. Ventral view; Carb. Limest., Kilmallock, Co. Limerick. 
Mus. G.8. I. c. Side view, from Brit. Carb. Foss., pl. xliii., fig. 2 4, 
(a and ¢ are different views of the same shell from Carb. Limestone, 
Nellfield, Lanarkshire). 
CaARBONIFEROUS LIMESTONE and SHALE.—CoAL Measures. “One of the 
most abundant and far spread species of the genus, found in almost 
every locality where Carboniferous Brachiopoda occur both in England, 
Scotland, and Ireland.” Brit. Carb. Foss., p. 151. It occurs in the Coal 
Measure shales of Crateloe, Co. Limerick ; and the Limestone of the 
Lower Coal Measures, Ballycastle, Co. Antrim. 
Fic. 6.—a, 6, Cuonrres papitionacea, Phillips, sp. 
Spirifera, Geol. of Yorksh. vol. ii., pl. ii., fig. 6. Chonetes, De Kon., Carb, 
Foss. Belg., pl. xili., figs. 5, &e. 
a. Dorsal view. 6. Portion of shell enlarged; from Brit. Carb. Foss., pl. 
xlvi., figs. 5, and 5 0. 
CARBONIFEROUS Limestone.—At many localities in England and Ireland. 
Fic, 7.—a, 6. SrrEPTORHYNCHUS CRENISTRIA, Phillips, sp. 
Sptrifer, Phil. Geol. Yorksh., vol. ii., pl. ix., fig. 6. 
Streptorhynchus, Dav. Mon. of Scottish Carb. Brach., p. 82, pl. i, figs. 
16—22. 
Original. a. Dorsal view. 6. Portion of shell enlarged. Lower Limestone 
shale, Hook Head, Co. Waterford. 
DEVONIAN AND CARBONIFEROUS.— This shell appears to have had a very 
extended vertical range and is recurrent from the Devonian, if not 
Silurian, period.” Davidson, Brit. Carb. Brach., p. 126. It is said to 
10) 
