ae ee 
VOL. XV. (2) C. UPTON—BRACHIOPODA 85 
The shell is quite different in shape from both A. sud- 
anglata and R. granulata, being more globose than either. 
It differs from the former in not having the very elevated 
front of that species, and from the latter in the lack of 
dermal granulation, and in the incompleteness of the 
foramen. 
R. Buckmant occurs from the base of the Pea-Grit, 
where it is rather small up to and in the coral-bed, which 
between Stroud and Leckhampton lies immediately upon 
the Pea-Grit.t I have found it at various localities in the 
Stroud district. 
The shell is not very dissimilar from some specimens of 
R. subobsoleta, and is quite possibly the ancestral form of 
that species. 
In my former paper I referred very briefly to the mode 
of development of the shells of the Zevebratule, the 
primitive type being devoid of frontal folds followed by a 
form having a simple elevated fold, and later by greater 
complexity. 
Mr Buckman has in the Club Proceedings * figured and 
described three specimens by the name of Zerebratula 
withingtonensis, which illustrate this feature.° 
The fossil figured by Mr Buckman is not uncommon in 
the lower part of the Pea-Grit in some localities. : 
Brachiopods are remarkably scarce in the Lower 777- 
gonia-Grit, but that formation at the Frith, near Stroud, 
has yielded me a considerable number of specimens 
of various forms, among them being one to which a some- 
what special interest attaches on account of its further 
illustrating the point raised. The shell is in shape very 
1 “ Handbook Geol. Cheltenham,” p. 243. 
2 Proceedings, Vol. xiii. (1901), p. 231, pl. xii. figs. 8-12. 
3 For fuller information with regard to the development of the shells of the Brachio- 
poda, see papers by the late Dr Beecher on “ Development of the Brachiopoda,” American 
Journal of Science, Vol. xli, (1891), p. 343, and Vol. xliv. (1892), p- 133; and by Mr 
Buckman, “ Bajocian of the Mid Cotteswolds,” Quart. Jour. Geol, Soc., Vol. li. (1895). 
