188 SUPPLEMENT TO THE BRITISH 



with Ter. globata, Sow., Ter. reticulata, Sow., and Rh. varians, var. Smithii, in the road- 

 side cutting in the village ; the best specimens are obtained out of the thin beds of clay 

 which alternate with the bands of light yellow stone. It also occurs, but sparingly, nearer 

 to Frome along with Wald. omithocephala, Sow., and Rh. varians, var. Smithii, and 

 T. globata, Sow. The species also occurs in the blue sandy limestone a little above the 

 Whitwell Inferior Oolite at Crambeck, near Castle Howard, Yorkshire, where it is rare to 

 find good specimens, but crushed examples are common. 



I may add that I found some specimens among the vast numbers collected, and 

 kindly forwarded to me by Mr. J. P. Walker and other friends, which may, perhaps, 

 hereafter be considered as representing species not described in this Monograph. As, 

 however, these occurred only in single, and often imperfect examples, I have deemed it 

 preferable to omit them in this Supplement. I should likewise wish to refer the reader 

 to Prof. Edward Hull's very instructive memoir on the ' Geology of the Country round 

 Cheltenham,' accompanying and explaining Sheet 44 of the Geological Survey Maps 

 (1857), in which all the formations from the Keuper, or New Red Sandstone, up to 

 the Pleistocene Deposits are described. Lists of the fossils, including Brachiopoda, are 

 enumerated from each formation where they occur, the localities being carefully appended. 

 A paper on the "Fossil-beds of Bradford Abbas and its Vicinity," by Professor 

 Buckman, in the ' Proceedings of the Dorset Natural History and Antiquarian Field 

 Club ' for 1877, may also be advantageously consulted. 



Genus Rhynchonella, Fischer. 



174. Rhynchonella Wrightii, Dav. Ool. Mon., p. 09, PI. XIV, fig. 1 ; Appendix to 



vol. i, p. 21, PI. A, fig. 27. 



Nothing new. Pea-grit (Inferior Oolite), Cheltenham district. 1 This shell appears 



1 The Inferior Oolite of the Cheltenham district has been divided in the ascending order as follows : 

 — 1. The Pea Grit, which reposes directly on the passage-beds, or Ammonite-sands (Upper Lias of 

 Wright), forms the base of the Inferior Oolite, and is composed of multitudes of flattened spheroidal masses 

 about the size of a pea, one fourth or one fifth of an inch in diameter ; it varies from thirty-eight to 

 forty in thickness in the district. It contains many Brachiopoda, which will be found enumerated in the 

 sequel. 2. Oolitic Freestone. — This constitutes the middle division of the Inferior Oolite, and contains 

 many fossils peculiar to itself. 3. Oolite Marl. — This forms a well-defined zone, and consist of layers of 

 white and yellowish marl and marly stone, though, according to Prof. Hull, sometimes almost entirely in a 

 consolidated state, as at Leckhampton quarries. It also contains many species of Brachiopoda, and is 

 generally non-oolitic, and in the face of a cliff may easily be distinguished by its chalky aspect. 4. Freestone, 

 consisting of a regularly stratified Oolite, compact, and not so fossiliferous as the remaining beds of the 

 series. Very few species of Brachiopoda have been met with in this division. 5. Ragstone. — This 

 is always, according to Hull, the highest member of the Inferior Oolite, and presents a remarkable 



