in (he Province of Granada. 377 



portion of it at least belongs, may be seen near the base of tK« 

 Sierra de Gador, and on the road from Almeria to Guadiz, k 

 city in the province of Granada about fifty miles inland towards 

 the north from the former seaport. This western part of the 

 tract is filled up variously with a coarse quartzose reddish sandi- 

 stone, often taking a conglomerate character ; loose and sertn- 

 indurated gravel ; and earthy and indurated argillaceous marl-; 

 in all of ^hich, except the last, the usual tertiary shells are ob- 

 served ; pectens*, balani, fragments of ostreae, and echinital 

 spines, existing in great abundance in the gravelly beds. The 

 argillaceous and superjacent gravelly beds dip towards the west 

 south-west at an angle of about 20% which would apparently 

 carry them under the unstratified tertiary calcareous deposit 

 noticed on approaching Almeria from the west, and upon an 

 eminence of which its old castle is situated. How far these ter- 

 tiary beds may be traced inland, up a sort of fissure or irregular 

 valley in the chain of mountains that border the Mediterranean, 

 extending from Almeria to Guadiz, or from S.S.E. to N.N.W., 

 will be ascertained by future inquirers; I followed them about 

 four miles inland on this line. 



Before leaving Almeria, I may perhaps be allowed to observe, 

 that the Mediterranean Sea has apparently, at some remote 

 epoch, washed the base of the primary Sierra de Alhamilla, in 

 which the low tract to the east of this town terminates towards 

 the north, as to the west of Almeria the same sea has advanced 

 to the foot of the bold escarpment of the transition limestone of 

 the Sierra de Gador, which confines towards the north the 

 long open tract along the Mediterranean shore from Adra to 

 Roquetas. These two tracts have probably been elevated and 

 added to the mainland by some of those subterranean agencies, 

 whose power has been manifested from immemorial time, arid 

 is so frequently felt at the present day, in this part of Spain. 

 (To be continued,) '**' ''' 



Mr Deshayes identified, 



Pecten benedictus 



Pecten dubius V from Almeria. 



Pecten striatus 



} 



