BRITISH DEVONIAN BR/VC!iIOPODA. 45 



37. Rhynchonella subreniformis, Schiur, sp. 



Terebeatula subreniformis, Schnur. Programm der bob. Beirgerscb., 1851. 



— — — Bescbreibung Eifel vorkommenden Bracbio- 



poden (Pal. von \V. Dunker und H. Von 

 Meyer), p. l/'l, pi. xxii, fig. 5, 1852. 

 Rhynchonella — Sandberger. Die Braeb. Rbeiniscben Scbicbtensystems 



in Nassau, p. 46, pi. xxxiii, fig. 11, 

 1855. 

 Camarophoria — Kayser. Die Bracb. des Mittel- und Ober-Devon. der 



Eifel ; Zeitscbr. Deutscben Geol. Gesel. 

 fur 1871 p. 534. 



Shell subpentagonal or transversely oval, wider than long ; valves almost equally and 

 moderately convex ; dorsal valve vi^ith a slightly produced, flattened, broad, mesial fold, 

 commencing to rise at about a third of the length of the valve ; ventral valve with a 

 broad, moderately deep, longitudinal sinus, commencing at the beak, and widening as it 

 approaches the front ; beak very small, much incurved ; surface of valves covered with 

 from ten to sixteen small, rounded, radiating riblets, commencing at a little distance 

 from the beak and umbo. Of these, four or five occupy the fold, three or four the sinus. 

 Some specimens are almost smooth throughout, or at the beak and umbo. In other 

 specimens there is present a slight longitudinal groove along the middle of the fold. 

 Dimensions very variable. 



Length 5, width 7, depth 4 lines. 



Obs. — This well-marked species has been well described and figured by Schnur and 

 Sandberger. Dr. Kayser places it in the genus Camarophoria, but the internal casts I 

 have seen from Biidesheim, near Gerolstein, in the Eifel, show no indication of Camaro- 

 2jhoria characters. It is seemingly a very variable shell, for some specimens appear to 

 be almost smooth, while others are distinctly ribbed. A specimen from Biidesheim 

 measured — length Gg, width 8^, depth ^\ lines. 



One poor specimen of this species, not perfect enough for figuring, was found by Mr. 

 Whidborne in the Upper Devonian at Saltern Cove, a locality the importance of which 

 was first recognised by Mr. J. E. Lee, and which was described by him in the ' Geolo- 

 gical Magazine' for 1877.' 



The beds here consist of dull brick-red argillaceous sandstone, much jointed, and 

 with apparently a slight westward dip. They occupy the second small headland south of 

 Goodrington Sands, in the centre of Torbay, and are faulted down against some Lower 

 Devonian red shales containing Pleurodictyum problematicum. 



1 See also Lee, 'Note-book of an Amateur Geologist,' p. 85, pi. cciii, 1881. 



