516 abstracts: botany 



moraine. This clay is the fine glacial outwash. The moraine and 

 the marine clay probably belong to a late Wisconsin substage of the 

 Pleistocene epoch. F. J. K. 



BOTANY. — Grasses of the West Indies. A. S. Hitchcock and Agnes 

 Chase. Contributions from the U. S. National Herbarium, 18: 

 261-471. 1917. 



The paper is a descriptive list of 110 genera and 455 species of the 

 grasses of the West Indies. For the purposes of the list the West Indies 

 includes Bermuda, the Bahamas, Trinidad, and Tobago but excludes 

 the Dutch Islands off the coast of Venezuela. There are keys to the 

 tribes and genera and keys to the species of each genus. The genera 

 and species are briefly described and under each species is given full 

 synonymy, the habitat, geographical range, the common names, and 

 the locality from which the species and the synonyms were described 

 (the type localities). An attempt has been made to account for all 

 the species credited to the West Indies. One genus and 14 species are 

 described as new. Appended to this list is a catalogue of all the speci- 

 mens in the U. S. National Herbarium, arranged by collectors' names 

 and numbers. A. S. H. 



