426 



ME. L. EICHABDSON & ME. J. F. WALKEE 



[Nov. 1907, 



Then the Dundry Freestone, which is later than the Upper 

 Trigonia-Grit, will be brought to correlate with the Bubbly Beds 

 of ISherborae (Dorset), which are in a similar position. 



Such is the general correlation that may be suggested for the strata 

 which Mr. Richardson has found in the Bath-Doulting district. 



Appendix II. — Remaeks on the Beachiopoda from the Ftjllebs v 

 Eaeth. By Linsdall Richakdson, F.G.S., and the late John 

 Feancis Walkee, M.A., F.L.S., F.G.S., F.C.S. 



The following species of brachiopods have been recorded from the 

 Fullers' Earth of England : the species that occur in the district 

 described in the foregoing paper being denoted by an asterisk. 



* Terebratula maxittata, Sowerby. 

 *Terehratula globata, Sow., non anctt. 

 ^Terebratula globata, auctt., non Sow., 



& varieties. 

 Terebratula lenthayensis, sp, no v. 

 Terebratu la linguifera,8 . S . B u ckm an . 



* Terebratula doultingensis, sp. nov. 



* Terebratula sphceroidalis, Sowerby, 



immature. 

 *Dictyolhyris subreticulata (Douville). 

 *Zeilleria emarginata (Sowerby). ■ 

 *Zeilleria bullata (Sowerby). 

 *Aulacolhyris Manddslohi (Oppel). 



* Ornithella, cadofnensis (E. Deslong- 

 champs). 



* 'Ornithella omithocephala (Sowerby,. 

 pars). 

 Ornithella triquetra (Sowerby). 

 Acanthothyris powerstockejisis, Buck- 

 man & Walker. 



^Acanthothyris doultingensis, sp. nov. 



^Acanthothyris mid.forolensis, sp. nov.. 



*Bhynchonella Smithi, Walker. 



*Bhynchonella plateia, sp. nov. 



* Bhynchonella valuta, sp. nov. 



* Ehynchonella Walkeri, Richardson, 

 sp. nov. 



ACANTHOTHYEIS DOULTINGENSIS, Sp. nOV. (PI. XXVIII, figS: 1 CL-\ C.) 



Type-locality (T.I.). — Farmcombe Quarry, near Doulting (Somerset). 

 Horizon (H.). — Fullers' Earth (Knorri-Cl&ys) . 



Hemera (77). 



Collection (Colin.). — L. Richardson. 



Diagnosis. — Shell globose, wider than long, apical angle acute, 

 margins of the shell rounded and somewhat fimbriated. The shell 

 is coarsely-ribbed, the spaces between the ribs being imbricated, and 

 the ribs are ornamented with irregularly -distributed spines. The 

 ventral or pedicle-valve has its greatest thickness near the centre, 

 sloping towards the anterior margin, where there is a shallow central 

 fold which occupies about a third of the width of the shell. The 

 beak is short, strongly incurved, and touches the umbo of the dorsal 

 or smaller valve. The dorsal valve is moderately convex, thickest 

 in the centre, and slightly truncated at the anterior margin, which 

 is fimbriated. 



R em arks. — This variety of Acanthothyris is not well-defined, 

 but can be separated from A. spinosa (Schlotheim) by the irregular 

 distribution of its spines. It can be distinguished from A. midford- 

 ensis, nobis, by its more globose form and acuter apical angle. It 

 has generally a greater number of spines, which are more irregularly 

 distributed ; but the imbrications between the ribs are similar. 



A. doidtingensis has been obtained from the quarry about a mile 

 east of Paulton, but it is a rare form. 



