82 Prof. Agassiz on the Fossil Fishes found by Mr Gardner 



On breaking these stones, some of them exhibit abundance 

 of a minute bivalve shell ; and at Mundo Novo I met with a 

 very perfect specimen of what I believe will prove to be a 

 species of Turrilites, about an inch and a half long, and a 

 single valve of a Venus, about half an inch in length, and in 

 very excellent preservation. Both of them were found in the 

 same fragment of limestone.* I was informed by a person in 

 Jardim, that a few years ago he found a small serpent coiled 

 up in a stone which had been split, but this, no doubt, was a 

 species of Ammonites. In the several hundred stones, however, 

 which I broke in search of fish, I met with nothing of this de- 

 scription. During my excursions in the neighbourhood of 

 Barra do Jardim, I nowhere met with limestone in situ. 



In conclusion, I may mention that the map of Brazil which 

 I possess is that published b} r the Society for the Diffusion of 

 Useful Knowledge, and that the towns of this province are 

 there very inaccurately laid down. Thus the Villa das Lavras 

 da Mangabeira, in place of being to the north of Ico, ought 

 to be ten leagues to the south of it ; and the Villa do Crato, 

 which occupies about the place of Lavras, ought to be twenty- 

 four leagues further to the south-west, which will bring it up 

 to its proper station at the foot of the Serra de Araripe ; 

 while Barra (not Bom) Jardim should be fourteen leagues to 

 the south of Crato. Such being the case with these, I have 

 no doubt that most of the other inland towns are equally erro- 

 neously laid down. The southern boundary also of the pro- 

 vince ought to run in a line with that which separates Para- 

 hiba from Pernambuco. 



On the Fossil Fishes found by Mr Gardner in the Province of 

 Ceara, in the North of Brazil. By Professor Agassiz. 

 Communicated by the Author. 



Among the fossil fishes collected in the north of Brazil by 

 Mr Gardner, and which haA r e been submitted to my examina- 



* These shells 1 have not seen, but Mons. Agassiz considers the minute 

 bivalves to consist of two kinds, both new and peculiar; and I shall be care- 

 ful to have them examined by competent conchologists.— J. E. B. 



