46 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
and Santa Catharina. The best defined horizon is described as that ‘ 
of the Estrada nova shales with flint concretions. So far as I could 
ascertain in 1908 the Glossopteris flora and beds of coal are only well 
known on the south in Santa Catharina while deposits with fossil 
trees are found on the north in Sado Paulo. The typical tillite beds 
are at present best known and apparently most extensively developed 
in the state of Parana. On the north in Sao Paulo only scattered 
stones occur in the beds. On the south in the Tuberado Valley no 
tillite beds are found but waterworn conglomerates occur. Farther 
south and west in Rio Grande do Sul some of the reports mention 
boulders near the base of ‘the section which may be presumed to 
indicate Permian ice-action, but tillite has not been described from 
there. Heretofore the Permian has shown only non-marine organic 
remains but the discovery of a sparse marine fauna in black shales 
near Rio Negro intercalated in the boulder-bearing beds demonstrates 
the at least temporary invasion of the district by the Permian sea. 
The sections traversed by the writer in Sao Paulo between Itaicy and 
Piracicaba, in Parané between Ponta Grossa and Conchas on the 
Tibagy, between Lapa and the base of the Serra do Espigao, and in 
southeastern Santa Catharina along the Tuberao Valley, seem to 
bear out the above statement as to considerable variation in the 
character of the sediments from point to point in the lower portion 
of the series. The following letter shows the progress of the geological 
survey up to 1912. 
Ponta Grossa, 13 de Dezembro de 1911. 
Meo caro Dr. Woodworth. 
Saude. 
...-.Hstou aqui prosequindo os meus trabalhos e como sei que as suas 
observacoées no Brasil ainda nfo estéo publicadas aproveito esta para lhe dar 
algumas indicagdes sobre a idade dos conglomeratos glaciaes. 
A primeira vez que encontrei camadas com fosseis marinhas em conglomer- 
atos glaciaes foi quando eu estava executando a sondagem do Passinho a 
12 km. ao sul de Imbituvo. Estas camadas foram encontradas a partir de 
120 metros de profundidade; tinham 45 metros de espessure e nellas achamos 
uma pequena lingula, escamas de peixes, e restos indeterminados de brachio- 
podoselamellibranchios. A partir de 160 metros de profundidade a sondagem 
atravessou até 395 metros exclusivamente camadas argillosas, sem estrati- 
ficagio, com pequenos seixos, e algumos boulders de granito. Em 1908, na 
sua companhia descobrei a camada fossilifera do Rio Negro. E’ um schisto 
negro, ardoriano, com Lingulas, Discina, peixes e restos de esponjas. Em 
Outobro deste anno consequi identificar as camadas da sondagem do Passinho. 
Ellas apparecem no grotio leste de T. Soares, 45 metros abaixo do arenito 
