267 



also small NiimmiiliMae and Orthophragminae occur in various local- 

 ities and Nummiilinae and Lepidocyclinae in other places. T encount- 

 ered in various tuffish limestones between Ardai and Arroyo Naranjo 

 small Nummnlites and Ortliopliragminae, while in limes, south-east 

 of Regla, to the south of the bay of Habana and to the north of 

 Guanabacoa, besides Nummulites also small Lepidocjclinae were 

 found, which also occur in the railway-cut, north-east of Palatino 

 (the finding-places are marked on the accompanying map).') This 

 "Older Habanaformation" is intensely folded, with dominant W — E. 

 strike, and rapidly alternating steep dips, so that no positive opinion 

 can be formed about the thickness of the whole complex of layers 

 with its few well-continuous sections. This thickness however is 

 sure to be very considerable. It is evident that this formation, which 

 contains Nummulites and Orbitoides, and which, in concurrence 

 with Salterain (1. c.) was generally mistaken for cretaceous, is of 

 a distinctly more modern type, being nothing else but the well- 

 developed and intensely folded eogene, which we recognize with 

 the same tectonic and partly also with the same petrographic features 

 in so many localities of the Antilles. The occurrence of Orthophrag- 

 mina implies that part of this intensely folded formation is decidedly 

 eocene. We will endeavour to ascertain whether perhaps subsequent 

 parts of the Tertiary are represented in this complex. 



If the fossils, occurring in the "Older Habana-formation", had 

 been found in Europe or Asia, there would be no doubt whatever 

 about the occnrrence also of oligocene and maybe even of old- 

 miocene rocks in this complex, as in Eui'ope as well as in Asia 

 Lepidocyclinae are characteristic of the oligocene and the older 

 miocene (Starapian to Burdigalian). However, in America Lepidocy- 

 clinae have been found also in unmistakably eocene deposits,') so 

 that their occurrence in the vicinity of Habana is in itself no evidence 

 at all. Now, the American species in positively eocene rocks (south- 

 eastern part of the United States), are all large species, except one 

 (L. floridana Cushmann with a diameter of 4 — 8 mm.). In San 

 Bartholomew (L. antillea Cushmann with 5 mm.) and in the zone 

 of the Panama canal (L. Macdonaldi with 5 — 7 mm.) there occur, 

 it is true, some smaller species in rocks, taken to be eocene, but 

 the age of these deposits is not so well established as that of the 



1) It is a pity that the names in the map are rather illegible but with the 

 aid of a reading-glass it will be possible to recognize most of them. 



») J. Cushmann, U.S. Geological Survey, Professional Paper, 125 D, 1920. 

 T. W. Vaughan, Proceedings First Pan Pacific Conference, Honolulu, 1921, 

 p. 754—755. 



