Geological Society of London. 375 



stones to the south of Granada and the Sierra de Gador as Triassic, 

 though in doubt (' Trias incertain '). 



" Under these circumstances, I was commissioned by the Director 

 of the Geological Survey of Spain to investigate the S.W. portion of 

 the Province of Almeria, which comprises the Sierra de Gador. In 

 ■ February last I had the good fortune of discovering abundant fossil 

 remains in different parts of the Sierra de Gador, which perfectly fix 

 the age of the metalliferous limestones of this part of Spain. 



" The whole series of rocks forming this sierra, resting on the 

 mica schists and slates of the Sierra Nevada, is a succession of black, 

 white, and purple talcose schists at the base, which alternate with 

 some beds of yellowish and porous limestone, and which pass 

 through a considerable thickness of grey limestones and slates, and 

 precisely where the fossils have been found, to the metalliferous 

 limestone of Sierra de Gador, which appears to form the top of this 

 interesting formation. 



" The fossils found belong to the following genera : — Myophoria 

 (M. l(Bvigata and M. Goldfussi), Hinnites, Monotis, Avicula (A. Bronni), 

 Myacites, Rissoa, and many others difficult to determine. 



" The places where the fossils have been found are the following : 

 on the southern slopes of the Sierra de Gador, in the Eambla del 

 Caiiuelo ; midway on the road from Felix to Marchal ; and in the 

 place named La Solana del Fondon, to the left of the River Andarax, 

 following the track between the mine Sebastopol and the town of 

 El Fondon. Joaquin Gonzalo t Xavier." 



2. "The Girvan Succession. — Part I. Stratigraphical." By 

 Charles Lap worth, Esq., F.G.S., Professor of Geology in the Mason 

 Science College, Birmingham. 



The Lower Paleeozoic rocks of the neighbourhood of Girvan, iu 

 the south of Ayrshire, have long been famous for the remarkable 

 variety of their petrological features, and for the abundance and 

 beauty of their oi-ganic remains ; but the strata are so intermingled 

 and confused by faults, folds, and inversions, that it has hitherto 

 been found impossible to give a satisfactory account of the geological 

 structure of the region. 



The most remarkable formation in this Girvan area is a massive 

 boulder-conglomerate, several hundreds of feet in thickness, which 

 forms the high ground of Benan Hill, and ranges throughout the 

 district from end to end. Employing this formation as a definite 

 horizon of reference, the author showed, by numerous plans and 

 sections, that it was possible for the geologist to work out tbe natural 

 order of the strata, both above and below this horizon, and to con- 

 struct a complete stratigraphical and palaeontological scheme of 

 the entire Girvan succession. This succession is composed of the 

 following members, arranged in descending order : — 



(I.) Uppee, Girvan Books. 



(D.) Daillt Series (1500 to 2000 feet), including the 



(3) Straiton Group, consisting of grey flags, shales, and grits, -m-ith Beyrichia 

 Kicedeni, Cardiola, etc. 



