20 



member of the Upper Calcareous Grit, which is thus described 

 as it occurs at Sturminster Newton Eailway section in a valuable 

 paper just brought out by these accomplished geologists : 



" No. 36 Rough Limestone, shelly, and hardened towards the 

 upper part, dnd having a thin led of Hue clay lelow. This contains 

 a few oolitic grains of all sizes up to that of a pea. Trigonia 

 Clavellata, &c. (very many specimens of shells). The authors 

 just quoted say that "A most fossiliferous quarry may le seen at 

 Glanvilles Wootton, composed of hard Hue finely oolitic ragstone, con- 

 taining shell layers, and gradually into fine shell limestone. The fossils 

 here are Trigonia clavellata (abundant), Astarte polymorpha" Sfc. 

 falout a dozen specimens, with bivalves J. This we may have the 

 pleasure of seeing, &c. 



So abundant indeed is the Trigona Clavellata that two slabs 

 worked out by that clever Fosil demonstrator, Mr. Bishop 

 Eeynolds, have as many as 40 valves each displayed out with 

 the minutest care. 



This subject is of interest to us, as it fixes a species, the name 

 of which, until Dr. Lycett's Monograph was published, had been 

 given to at least a dozen forms. 



The great interest, however, consists in the fact of the large 

 masses of individuals which are met with in different places. 



This added to the perfect state of preservation presented by 

 these fossils make this species one of your most interesting of 

 oolitic fossils. 



Our county is rich in Trigonias, and as a prize is offered to the 

 King's School for a paper on the different forms which occur in 

 the inferior oolite of Dorset, we shall hope for as successful a 

 working out of species as has already been done in the case of 

 the genus Astarte a paper on which will be found in the 

 present volume. 



