28 On the Fossil Conchology of Minchinhampton. 



surface when young covered with beautifully large waved stria) ; a good 

 series will show the gradual disappearance of these until a mere remnant 

 is seen on the anterior border; the figure becomes more gibbose and 

 elongated, and finally is devoid of all markings, except the concentric lines 

 of growth. It is found in the the shelly Great Oolite and Fimbria bed of 

 the Inferior Oolite. Macrodon Hirsonensis is another example. Phillips, in 

 his *• Geology of Yorkshire," gives two shells the name of Cucullaea 

 clongata, one of which, t. 11. f. 43, is our species in its young state, with 

 regular longitudinal stria). A broken specimen with striae more irregular, 

 but still in its young state, is the Cucullaea rudis of the " Mineral 

 Conchology," t. 447. Another variety of figure, more advanced in age, 

 is the Area elongata of Goldfuss, t. 123. f. 9. Cucullaea Hirsonensis, 

 Archiae, t. 27. f. 5, is a half-grown specimen with the longitudinal stria) 

 obliterated. The genus is described in Mr. Buckman'a " Geology of 

 Cheltenham," but the species there figured seems to be distinct from the 

 one in question. Our species is abundant in the planking beds, but more 

 rare in the Fimbria and Freestone beds of the Inferior Oolite. To pursue 

 the subject further would involve descriptions of individual species useful 

 only in a monograph devoted to the purpose. Here these remarks may fitly 

 conclude with the expression of a hope that ihe large number of our Great 

 Oolite shells new to science may ere long be gitren to the public*, and that 

 the fossil fauna of the Cotteswolds generally may by the instrumentality of 

 this Club acquire a "local habitation and a name." Probably no district 

 in England contains an equal number of fossil treasures which have not as 

 yet been transferred to the plate of the engraver. 



• Perhapi by means of the Palseontographical Society. 



