TERTIARY FLORA OF CHILE 121 



rachis is still imbedded in the matrix and 2 or 3 pinnules on 

 each side are folded back with their ends broken off. 



It is rather singular that with the small amount of material 

 at his disposal Engelhardt should have recognized as repre- 

 senting a Zamia the small fragment figured by him and 

 should have failed to recognize the relationship of the 

 larger specimen which he refers to and figures as a fragment 

 of a monocotyledonous leaf. This will account for the fact 

 that Engelhardt compared the species with the existing 

 Zamia integrifolia Ait. of Florida and the Antilles, when it 

 actually is much more similar to several existing South 

 American species. Engelhardt's type is given as from Coro- 

 nel but since it came from the Cousino workings it is 

 obviously from the locality referred to as Lota in the pres- 

 ent paper. Remains of cycad pinnules are apparaently rare 

 in the vicinity of the coal seams exploited at Coronel and 

 Lota for the Engelhardt collections contained only the frag- 

 ments figured and I saw none at either place. Farther south 

 at the mines of the Arauco Company at Curanilahue cycad 

 remains are exceedingly abundant and in places the shales 

 are packed with their detached pinnules. There can be no 

 question of their identity and it is interesting to find them 

 associated with Tertiary palms and araucarians at 37^2 

 south latitude. 



The genus Zamia, which probably includes forms not at 

 all genetically related to the fossil species referred to Zam- 

 ites, comprises about 35 existing species ranging from penin- 

 sular Florida, Mexico and the Antilles through northern 

 South America and along the eastern Andean slopes to about 

 the latitude of northern Chile. (The geographically nearest 

 form to the fossil that I know of comes from the Velasco 

 Hill country in eastern Bolivia.) It is the dominant existing 

 cycad genus of the Western Hemisphere. Its range during 

 the Tertiary was apparently more extended than it is at the 

 present time since species have been found north of the 

 existing range in the Eocene of the Mississippi embayment 



