NOME XVII. PHOSPHORITE. 



green by steatitic clays ; it contains a number of 

 conical nodules, in which the different substances 

 which compose it are rolled in a spiral form, 

 and represent so many little distinct whirlpools, 

 as independent of one another, as different from 

 the flexions of the layers which contain them."* 



HYPONOME I. 



Red guttular marble of Campan. 



HYPONOME II. 



Green. 



NOME XVII. PHOSPHORITE. 



This rock is reported by some to form hills, 

 and by others only thick strata, in the province 

 of Estremadura, in Spain. It is said somewhat 

 to resemble curved laminar barytes ; and is of a 

 yellowish white colour, often spotted with yel- 

 lowish grey. It is a combination of lime, and 

 phosphoric acid, the latter amounting to 34. It 

 is rather soft, and brittle, and translucent on the 

 edges. 



Brochant says that its site is at Logrosan near 



* Ramond, Voy. au Mont Perdu, p. 99. 



