GEOLOGY OF PERU ADAMS. 403 



upper Cretaceous represented. He says, in summing up concerning 

 the lower Cretaceous, that in Peru the only highest part of the lower 

 Cretaceous (the Albien) is certainly known and the Neocomian prob- 

 ably may be present. 



In various bulletins" of the Corps of Engineers of Mines of Peru 

 J. J. Bravo has published (1901-1906) determinations of Cretaceous 

 fossils and has described some species. This is the most important 

 work done in paleontology by a Peruvian. Through his efforts the 

 corps is gradually acquiring a collection of fossils and developing a 

 paleontologic literature. Bravo has called attention to the fact that 

 previously Pflucker y Eico had collected fossils and given a relation ^ 

 of localities and a list of fossils obtained in the districts of Yauli 

 (Morococha), but the collections were lost. He also cites two species 

 of Pseudo-ceratites from Yauli, described by Hyatt.'' 



In 1901: Habich, in his report on the coal deposits of Checras, in the 

 Province of Chancay,<* mentions the finding of Cretaceous fossils in 

 limestones and plants in the coal-bearing beds. 



Similarly Malaga Santolalla (1901) found fossils in Hualgayoc^ 

 and concluded that the middle or upper part of the Cretaceous is 

 represented there. He also gives f a list of fossils from the Province 

 of Cajamarca described by various authors. 



In his report on the Province of Colendin ^ he likewise gives a list 

 of Cretaceous fossils. Lisson (1905) collected a few fossils from near 

 Chorullos. just south of Lima, and described'' some Annelid tubes, 

 and a new species Sonnerata Pfjuckeri and redescribes S. Raimondi- 

 anus Gabb. 



In the winter of 1903-4 Steinmann made some collections in the 

 Cordillera east of Lima and from the Island San Lorenzo in front of 

 Callao. This material was studied by Neumann, who also included 

 some fossils in the Hamburg Museum, from Lucha, and the quebrada 

 of Huallauca, in the Province of Ancachs. In his report (1907) he 

 says that up to this time the Cretaceous was very incompletely 

 known and that according to his knowledge no lower Cretaceous had 

 been found. The fossil plants from San Lorenzo, studied by Neu- 



" Bulletins Nos. 10, 19, 21, 25, 35, 51, dealiug with the Provinces of Cajatambo, 

 Cajabamba, Pataz, the district of Morococha, the Provinces of Jauja and Huan- 

 cayo, and the Province of Hiianiachuco, respectively. 



*Apuntes sobre el distrito mineral de Yauli, Annales de Const. Civiles y de 

 Minas del Peru, Tome III, 1883. 



" Pseudo-ceratites of the Cretaceous, U. S. Geol. Survey Monograph XLIV, 1903. 



^ Bol. de Cuerpo de Ing. de Minas del Peru No. IS, E. A. V. de Habich. 



c Bol. No. 6. 



1 Bol. No. 31. 



d Bol. No. 32. 



^ Bol. No. 17, Los Tigillites del Salto del Fraile y algunos Sonneratia del 

 Morro Solar. Carlos I. Lisson. 



