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THE AMERICAN NATURALIST [Vol. XLII 



A Fossil Milkweed 

 On the same piece of shale as the Lomatia acutiloba, 

 found by Mr. S. A. Rohwer at Station 20, is the follicle 

 of a species of milkweed. It is 54 mm. long, 14 wide in 

 the middle, dark colored as preserved, with a longitudinal 

 suture and without tubercles. It closely resembles the 

 follicle of the modern Acerates auriculata, but is rather 

 less tapering. It may be known as Acerates fructifer, 

 n. sp. A similar follicle was described by Heer as 

 Acerates veterana, and was found at (Eningen and other 

 localities. 



minor groups of the genus were separated in the miocene. 



A Prickly Akaliaceous Plant 

 At Station 13 B Mr. S. A. Rohwer found a leaf with 

 five oblong, long-stalked leaflets, as preserved light red- 



