330 BRACHIOPODA OF THE 



Description of the Brachiopoda that occur in the Budleigii-Salterton 



Pebbles. 



I have felt it desirable to notice and figure every species that has been collected from 

 this very remarkable locality. Unfortunately, of a few the material has been incomplete 

 and scanty, there being imperfect internal casts and external impressions only. Hence 

 it was not possible in some instances to hazard a specific identification ; but of the larger 

 number of species it has been possible, by the means of white gutta-percha, to reproduce 

 both the external and internal surface of both valves, and to arrive at a satisfactory specific 

 identification. 



I have divided these species, generally correctly I believe, into the two systems ; but 

 it is very possible that one or more of those classed as Devonian may eventually turn out 

 to be of Silurian age. This in all probability will be hereafter made certain by the 

 discovery in the same pebble of two or more species of well ascertained age. We here 

 notice all that we know to draw attention generally to the subject, and specially to 

 interest those geologists who may be collecting in the locality. 



As already stated, it is sometimes very difficult to determine the real species to which 

 some of the imperfectly preserved casts and moulds belong ; and I frankly admit that I 

 have, in certain cases, felt much uncertainty while giving to the fossil even a provisional 

 specific name. I thought, however, that by doing so it might facilitate future research 

 and reference ; and no trouble has been spared in the endeavour to arrive as near as 

 possible to the truth. 



The following is as nearly correct a list as I have been able to make it of all the 

 Devonian and Silurian species obtained from the Budleigii-Salterton pebbles : 



Species from the Lower -Devonian Sandstone. 



Terchratula sacculus, Martin. Rliynchonella Thebaulti, Rouault. 



? Athyris ? incerta, Dav. „ elliptica, Schnur ? 



,, Budleighensis, Dav. ? ,, Vicaryi, Dav. 



„ ? erratica, Dav. ? „ Valpyana, Dav. 



Spirifera Verneuilii, Murchison. ? ,, sp ? 



,, speciosa, Schlotheim. „ ovalis, Dav. 



Spiriferina octopticata, Sow. Ortlds Hamoni, Rouault. 



Rliynchonella Wimvoodiana, Dav. ,, Monnieri, Rouault. 



„ sp. ? perhaps R. inaurila, „ Hipparionyx ? 



Sandberger. StropJtomena Vicaryi, Dav. 



„ inaurita, Sandb. „ Rouaulti, Dav. 



