562 



Valley of Copiapo. 



paet n. 



Goquimbo. 

 Pecten Dufreynoyi \ 



Ostrea hemispherica . ,-. c ^ -u« m 



Terebratula enigma m the Same bed ' El ° CUao ' 



Spirifer linguiferoidesj 



Hippurites Chilensis 

 Gryphea orientalis 



same bed, near Arqueros. 



Terebratula enigma \ in same block \ 



ignaciana f of limestone. 



Pecten Dufreynoyi 

 Ostrea hemispherica 

 Hippurites Chilensis 

 Turritella Andii 

 Nautilus Domeykus 



Pecten Dufreynoyi 

 Turritella Andii 

 Terebratula ignaciana 



enigma, var. 



Spirifer Chilensis. 



Collected by M. Domeyko 

 from the same locality, 

 apparently near Arque- 

 ros. 



Guasco. 



In a collection from the Cordillera, 

 given me: the specimens all in the 

 same condition. 



Copiapo. 



Pecten Dufreynoyi \ 



Turritella Andii ,, . , , , ,, • •,, 

 Terebratula enigma, mr. as at Guasco Mm f ed ^f^*™ &lteT ' 



Astartp Darwinii natmg beds in the mam 



r, , ^ . .. h valley of Copiapo near 



Gryphea Darwinii T \ , * l , , . , 



J ^ , Las Amolanas, and like- 

 nov. spec. / 



Perna Americana 

 Avicala, nov. spec. 



Terebratula enigma (true) 



Terebratula enigma (true) 

 Pecten Dufreynoyi 

 Gryphea Darwinii ? 



J 



wise higher up the valley. 



(Main valley of Copiapo. apparently 

 same formation with that of 

 Amolanas. 



In the same bed, high up the great 

 lateral valley of the Despoblado, 

 in the ravine of Maricongo. 



Considering this table, I think it is impossible to 

 donbt that all these fossils belong to the same formation. 

 If, however, the species from Las Amolanas, in the 

 Valley of Copiapo, had, as in the case of those from 

 Guasco, been separately examined, they would probably 

 have been ranked as oolitic ; for, although no Spirifer s 



