IQI4-] SOUTHEASTERN NORTH AMERICA. 239 



There are about a dozen Oligocene species, ten of which are wide- 

 spread in Europe, one is found in the Apalachicola group of west- 

 ern Florida and two forms, representing both leaves and fruit, are 

 found in the Vicksburg group of Louisiana and Texas. There are 

 seven or eight Miocene species widespread in Europe and one is re- 

 corded from the late Miocene of Colorado. 



The genus Chrysophyllum Linne with about sixty existing species 

 found in all tropical countries, but the majority American, has a 

 supposed species in the Upper Cretaceous of Saxony (Nieder- 

 schcena) ; a well marked species in the Wilcox flora; three Oligo- 

 cene and six Miocene species in Europe. 



The genus Mimusops Linne with about 40 existing species in all 

 tropics has three well-marked Wilcox species and a fourth in the 

 overlying Claiborne deposits. To it has been referred a species from 

 the Upper Cretaceous of Saxony (Niederschcena) and it is undoubt- 

 edly represented in the Upper Cretaceous of the embayment region 

 as well as elsewhere by the leaves that have been referred to the 

 form-genus Sapotacites. 



The genus Sideroxylon Linne, with about eighty existing species 

 in the oriental tropics and about fifteen in the American tropics, 

 has two species in the Wilcox flora which are the oldest thus far 

 discovered. To this genus have been referred four Oligocene and 

 one or two Miocene species from Europe. 



Isonandra Wright a small modern genus of the Malayan region 

 is represented in the Tertiary of Borneo by I sonandrophyllum Gey- 

 ler; the genus Achras Linne {Sapota Plumier), now monotypic in 

 the West Indies, has three species in the European Miocene ; Laba- 

 tia Swartz, with six existing species in the American tropics, has 

 been doubtfully determined in the Miocene of Prussia and Italy; 

 and Felix has described two forms of petrified wood which he refers 

 to this family under the name Sapotoxylon, one species from Ger- 

 many and the other from an unknown locality and horizon. 



A large number of fossil forms of Sapotaceae have been referred 

 to the form-genus Sapotacites proposed by Ettingshausen (also Sapo- 

 tophyllum). There are at least ten Upper Cretaceous forms wide- 

 spread in North America and represented in Europe in the Perucer 



