OFSTONES. 8 1 



the intermediate ones moft beautiful ; fome with their joints 

 elegantly ferrated, forming wavy lines, with a punctated fur- 

 face ; fome with Appcndiculx, or radiated ftuds and branches ; 

 fome with oval, and others with round hollows on their fides, 

 like cups, as if they were the fockets of branches ; fome like 

 f crews, and therefore called fcrew-flones ; fome of thofe finer 

 and thinner edged, and others blunter and rounder, with fewer 

 circles. 



The Aften<e, or ftar-ilones, are from lefs than half an inch to 

 two inches in length. Some of them are perfect Intaglio, and 

 may ferve for feals. They have not all the like number of angles, 

 nor are all the angles acute. Some of the flellar cavities are 

 filled with a black, and others with a red fubflance, which on 

 a white ground look very beautiful. Some of them have a 

 fingle order of rays, and others a double one, encircling the 

 {tars ; the latter order generally higher, and more raifed next the 

 brim. Some of them have elegant red wavy lines running 

 through their white fubflance. 



That beautiful fpecies of AJleria which forms a flellar figure 

 like the P entlphylhm flower, full-blown, found at Lepplngton, near 

 Malton, and at Bugthorpitt. the foot of the wolds in Yorkjlnre (p) y 

 is not found with us. 



The Ajleropodium of Mr. Edward Lhwyd (q)-> and others (r) is 

 frequent in clay, with the former. It is fcemingly but half 

 formed, yet perfect and beautiful in the other half, having two 

 flattifli fides with a narrow ridge, the joints falling between 

 each other. It is conflantly found of the fame figure. 



(p) Ph. Tr. No. 112. 



(r) Hill. Hift. Foff. p. 654. 



VOL. I. 



(q) Lithopliilaceurn Britaniiicurti, 



M 



All 



