Joseph Mawson — The Cretaceous of Bahia, Brazil. 357 



The Map now given (p. 360) shows the Cretaceous formation along 

 the coast of the bay from Montserrat as far as Toque Toque, i.e. the 

 district adjacent to the city of Bahia, and it is offered, with a few 

 further notes, as an aid to any observer who may have opportunity 

 and inclination to take up work which the writer has now had to 

 relinquish. 



Association of Fossil Mollusca with Fossil Vertebrate Remains. 



Amongst other instances noted are the following: — 



Towards the Montserrat end of Pedra Furada Bay three parallel 

 bands of limestone stand out distinctly in the cliff and on the beach. 

 Scales, teeth, and bones of fishes associated with shells of the univalves 

 common to the other beds of this series are found encrusted in places 

 in these bands. The shale between them contains Estheria, etc. 



Immediately underlying the lowest of these limestones is a thick 

 bed of dark-blue shale, which also contains scales (of two or more 

 species of Lepidotus) and other fish-remains associated with molluscs 

 {Anodonta, Faludina, Melania, etc.). This same shale has also 

 yielded a tooth of a Pterosaur, and contains a fine-textured thin 

 greenish layer, with a lustrous surface showing numerous small 

 delicate bones, with shells of molluscs and Ostracods. 



In a thin bed of shaly sandstone, a little nearer than the above to 

 Pedra Furada, all the smaller shells are found in abundance, and 

 with them I have discovered small scales and teeth of Lepidotus, etc. 



Between Pedra Furada and Bomfim a blue shaly mudstone has 

 yielded a portion of a large scale of Lepidotus, associated with shells 

 (not specified). A limestone near here full of shells {Melania, etc.) 

 has yielded fragments of bone or teeth. A long slender species of 

 Melania appears to be new and undescribed. 



A little above km. 4, Bahia and San Francisco Railway, in an 

 inlet of the bay, Estherice and Cyprids are found in a bed of shale 

 with Megalurus and other fish-remains. 



At km. 7^, on the beach, in a blue shale under conglomerate, 

 a small Flanorbis is found amongst an abundance of Entomostraca, 

 and this shale contains also teeth of crocodile and a variety of scales, 

 bones, and teeth of fishes, etc. 



At Settibal the interstratified gravels and mudstones contain 

 vai'ious teeth, large and small, of reptiles and fishes ; scales, etc., of 

 fishes; and with them I have observed a mollusc {Paliidina). 



Km. 78-82. Cuttings on the-railway line here show a soft yellow 

 shale, bearing shells and a few fish-remains. The shells agree with 

 those from San Thiago. 



Km. 86, San Thiago. Over a tough drab-coloured shale, nearly 

 unfossiliferous, lies a softer mellower shale containing Attodonia and 

 other shells, and immediately overlying this is a bone-bed crowded 

 with vertebrate remains. 



At Ponto de Matuira, across the bay by canoe from Mapelle station 

 (km. 22), there is a hard grey stone in reefs, with fossil remains of 

 fishes and Entomostraca in various beds. 



On the beach beyond Toque Toque is a highly fossiliferous rock 

 (which may be compared with that of Mapelle Quarry), composed of 



