

FOSSILS FROM TfiE UPfEU GfcEEKSAND. 107 



ing Dorset Greensand are, however, a well-marked race or variety, 

 most of them being as long as they are wide, and some even 

 longer, the umbones being produced till the apical angle is only 45 

 or even less, and the shell has in consequence a triangular shape. 

 Should the same form be found at other localities, and at the same 

 horizon, it may perhaps deserve a special name, but for the present 

 it may be regarded as a local race of Rh. Mantelliana. 



Terebratella Beaumonti, d'Arch., Mem. Soc. Geol. de France, 

 Ser. 2, Tom. II., p. 331, PI. XXL, figs., 12-14. 



There are in the Dorset collection several specimens of a small 

 Brachiopod, having the aspect of a Terebratella, and resembling 

 that figured by d'Archiac as Ter. Beaumonti. They only differ in 

 having a few more ribs than his types, and thus approach Ter. 

 Fittoni, which, however, has a still larger number. T. Beaumonti 

 is described as having from 12 to 14 ribs, which are straight, 

 rounded, and separate, while in T. Fittoni most of the ribs are 

 dichotomous, so that round the edge of the valves from 24 to 40 

 may be counted. The number on the Dorset specimens is from 15 

 to 18, and they are not dichotomous. In the short truncate beak, 

 inflated lower valve, and small size of shell, they also agree with 

 T. Beaumonti. 



Cardiaster fossarius, Benett. This Echinoderm is not an 

 uncommon fossil in the higher part of the upper Greensand, and I 

 have found it in the calcareous sandstone of Maiden Newton ; but 

 in that of North Dorset, between Evershot and Stoke it appears to 

 be a rare fossil, for only one specimen has been found. This was 

 obtained by the Rev. H. D. Gundry, of Cerne Abbas, at Bookham 

 in 1893, and was by him presented to the Museum. 



/ 



ParJceria sp. Among the fossils which pecall those of the 

 Cambridge Greensand are some fine specimens of the curious 

 organisms known as Parkeria, When first described they were 

 supposed to be gigantic forms of Forammifera, but recently ZitteJ 



