384 
SUPPLEMENT TO THE BRITISH 
Genus Rhynchonella, Fischer. 
23. Rhynchonella reflexa, de KonincJc. Sup., PI. XXXIII, figs. 7, 8, 9. 
Terebratula reflexa, de lioninck. Animaux fossiles du Terrain Carbonifere de 
Belgique, p. 298, pi. xx, fig. 4, 1842—44. 
Shell pentagonal, as wide as long, or a little longer than wide, thick in the adult 
condition. Dorsal valve convex, especially so at the umbo, longitudinally and mesially 
depressed ; a single rib commencing in the depression begins to rise at about a third of the 
length of the valve from the extremity of the umbo, and extends and widens until it reaches 
the front. Ventral valve more convex and arched than the dorsal one, with two ribs com- 
mencing at a short distance from the extremity of the beak with a deepish sinus between 
them ; the outer slopes of the ribs facing the lateral portions of the valve are wide* 
and before reaching the margin give rise to a small sub-marginal plait ; beak small, 
pointed, and incurved over to umbo of opposite valve ; foramen exceedingly small and 
concealed. Surface smooth, marked only by a few concentric lines of growth. Interior 
not known. 
Length of a large specimen 5, breadth 4, depth 3 lines. 
Obs. — British specimens of this small species were not known to me at the time I 
had completed my Carboniferous Monograph, but two years later Mr. Carrington dis- 
covered some six or seven specimens in the Carboniferous Limestone of Wetton, in 
Staffordshire, and about the same time Mr. Burrow found two examples in the Carbo- 
radialis, Rhynchonella pleiirodon, Streptorhynchus crenistria, Chonetes Laguessiana, C. Buchiana, 
Productus semireticulatus, Prod, scabriculus, P. margaritaceus. 
Black Kock Quarry, Avon. — Carboniferous Limestone — Retsia carhonaria, Spirifera hisulcata, Prod. 
semireticulatus. 
Clifton. — Carboniferous Limestone — Spirifera duplicicosta. 
Leigh Woods, the left bank of the Avon facing Clifton, but in Somersetshire — Athyris Royssii, 
Spirifera lineata, Chonetes Suchiana, Productus, sp. ? 
Weston-super-Mare, about twenty miles south of Bristol. — Carboniferous Limestone — Orthis 
Michelini. 
Hutton, about four miles east of Weston-super-Mare. — Carboniferous Limestone — Athyris Royssii. 
A«hcombe quarries, about half a mile north of Weston-super-Mare, being nearly the top beds of 
Worle Hill — Prod, cora, P. punctatus, Spirifera duplicicosta. 
Westbury-on-Tyne, about four miles north of Bristol, being at the top of the Carboniferous Limestone, 
or rather Lower Limestone Shales — Athyris ambigua, Spiriferina laminosa, Sp. cristafa, 
Spirifera bisulcata, Syringthyris cuspidata, Rhynchonella p'l^ui'odon, Strophomena analoga, 
Streptorhynchus crenistria, Choneles Laguissiana, Productus pustulosus, Prod, semireticulatus. 
