448 APPENDIX H. 



of hard courses interstratified with brindled yellowish sand- 

 stones and variegated puce and grey marls, having a general 

 dip to the south-east, but so twisted about that the dip and 

 strike are often reversed within a few feet. The country has 

 a general undulating contour, here and there rising up into 

 ridges of from 2,000 to 3,000 feet, in which the hard bands 

 weathered out from the softer strata are strikingly prominent 

 from a great distance. 



We observed no palseontological evidence of their age ; but, 

 judging from their resemblance to the cliff-sections near Saffi, 

 where fossils occur, they are presumably Neocomian or Cre- 

 taceous. 



Fucoids were collected by M. Coquand in the vicinity of 

 Tangier, in beds considered by him to be representatives of the 

 Upper Chalk ; but M. Mourlon, referring to the works of Pareto 

 and Studer on the nummulitic rocks of the Northern Apennines 

 and Switzerland, inclines to place the Tangier fucoid beds above 

 the nummulitic horizon, and as part of the Upper Eocene. But 

 near the villages of Souani and Meharain, a little to the south 

 of Tangier, undoubted Cretaceous fossils were met with by M. 

 Desquin, including 



Inocermnus, 



Ostrea Nicaiaei, 



0. syphax, 



Glohiconcha ponderosa (?), 



Trigonia (casts), and 



Echinodermata (undeterminable) ; 



and M. Mourlon concludes that the Tangier promontory con- 

 sists of Eocene beds resting on Cretaceous. 



The eastern half of the northern promontory, including 

 Tetuan and Apes' Hill facing Gibraltar, consists of beds of a 

 different character, for the most part of a hard metamorphic 

 limestone, in which dip and strike are very obsciu'e : these may 

 be a southern extension of the Gibraltar limestone ; but I had 

 no opportunity of tracing the connection to Tetuan. 



The late James Smith, of Jordan Hill (in ' Journal of Geo- 

 logical Society,' vol. ii. p. 41), mentions the occurrence of casts 

 of Terebratula fimhriata and T. concinna, belonging to the Lower 

 Oolite, in the Gibraltar limestone. M. Coquand also assigns to 

 the Jurassic period the beds in the neighbourhood of Tetuan and 



