130 Derbyshire Fossils. 



amongst the debris of the leadworks, the screwstone, with 

 Spiriferae in chert, the latter fossil sometimes showing the 

 internal spiral process ; although I was not so fortunate as to 

 meet with such a specimen: also, Productae, E'ntrochi, ikfadre- 

 porae, Calamoporae, Cyathophyllae, lead ore, calamine, &c. 



In the adjoining parish of Wirksworth are found some of 

 the finest madreporal and encrinal limestones, and of the 

 greatest variety, which are much used at Matlock, for polish- 

 ing, and cutting into a great many beautiful ornaments. The 

 quarries also abound with E'ntrochi, Productae, Spiriferae, 

 Cyathophyllae, &c, detached from the limestone. Here I 

 met with three specimens of an unfigured Producta. Charles 

 Hurt, Esq., of Wirksworth, has a good, although not an ex- 

 tensive, collection of fossils. This gentleman very politely 

 showed me all his rarities, among which are many of the 

 neighbourhood', including several fine specimens of Spirifer, 

 with the internal spiral process well developed; also the 

 Dudley fossil (trilobite) in great perfection, &c. &c. 



From Matlock, I paid a visit to a quarry, at Darley Bridge. 

 This abounds with E'ntrochi and Productae, and contains, also, 

 some Spiriferae. There I collected five species of Products ; 

 also a single joint of a Pentacrinites, differing from any 

 figured by either Parkinson or Goldfuss ; and I would re- 

 commend this quarry to the attention of collectors. I also 

 paid a visit to Mr. White Watson, at Bakewell, formerly 

 much known as the coadjutor of Martin, and who still retains 

 many specimens, from which Martin's figures were taken. 

 Mr. Watson's collection is not extensive, but he has some 

 rare Derbyshire fossils. I presented him with a small col- 

 lection, from the more southern part of England ; and he 

 favoured me, in return, with a lump of chert, containing two 

 Spiriferae, with the spiral processes visible ; and also, amongst 

 other fossils, with a few specimens of Producta horrida, from 

 Bolsover, in one of which the hinge is displayed. Chert is 

 now being quarried at Bakewell for the Staffordshire potteries. 

 The limestone, near Buxton, is extensively worked, but is so 

 compact, that few of numerous fossils can be detached ; they 

 are chiefly Madreporae, E'ntrochi, and a few Productae. 



At Castleton, my time was too limited for personal research ; 

 I therefore contented myself with making collections in the 

 shops, two of which contained many interesting specimens. 

 The keeper of the one next to the church is an intelligent 

 man ; he knows the localities well, and I would recommend 

 collectors to apply to him for information, in order to save 

 time. 



London, Jan. 14. 1833. 



