proceedings: biological society 375 



or combinations thereof with lead. In all cases this lead poisoning 

 seemed to result fatally, and on certain marshes a considerable number of 

 waterfowl are destroyed in this manner. The speaker described the 

 symptoms and post-mortem appearances fully and gave details of ex- 

 periments and observations made in the laboratory and in field work. 

 He also exhibited specimens of shot removed from the gizzards of 

 ducks, showing how they had been worn by muscular action, and also shot 

 dredged from the feeding grounds. 



A. S. Hitchcock: Generic types. The speaker reviewed the tenden- 

 cies in generic nomenclature of plants and referred to the rules concern- 

 ing generic types in the American Code of Botanical Nomenclature. 

 He also referred to the rules in the International Code which concern 

 the use of the generic name although these rules do not recognize type 

 species. Precision in the application of generic naraes is attained only 

 when it is recognized that a genus, however limited as to component 

 species, must include the type species. In other words, the type species 

 of a genus should determine the apphcation of a generic name. It is 

 obvious that the type species is the species or one of the species included 

 in the genus when it was established. It is recommended that the 

 type species be designated when a new genus is pubhshed. Since the 

 older authors in most cases did not designate their generic types, it 

 becomes necessary to select the type species for the genera in which the 

 types have not been designated. If there is agreement as to type 

 species there will be agreement as to the apphcation of generic names. 

 Of course it does not follow that there will be agreement as to the hmi- 

 tation of genera. One concerns nomenclature, the other concerns 

 taxonomy. Mr. Hitchcock has investigated 255 generic names of 

 grasses and indicated their type species. Several examples were given 

 illustrating the method of selecting the types. 



The paper was discussed by Dr. L. 0. Howard, W. L. McAtee, and 



S. A. ROHWER. 



W. W. Eggleston: Thomas NuttaWs trip to Oregon in 1834, '^iih 

 notes on the route. Thomas Nuttall was a member of Captain N. J. 

 Wyeth's Second Oregon Expedition. Nuttall's data on localities is 

 meager, therefore collections along his route would be useful. Collec- 

 tions should begin at Scotts Bluff and cover the country to the mouth 

 of the Columbia. The more important places to visit are Scotts Bluffs, 

 Nebraska, Laramie Mountains (Black Hills) along Platte River, Granger, 

 Wyoming, Soda Springs, Idaho, Fort Hall (furtraders' fort), Idaho, 

 Wildhorse Creek, Idaho, Blue Mountains, Oregon, and the region around 

 Sauvies Island, Oregon. 



In 1916 the Cusick Brothers and the writer studied the route across the 

 Blue Mountains. This Indian trail led up Burnt River and Alder 

 Creek to the vicinity of Pleasant Valley, where the party lost the trail. 

 Proceeding northward the party crossed Powder River about six miles 

 below Big Creek, passed the head of Cusick Creek, and on through Thief 

 Valley, relocating the trail at the Powder River, crossing between North 

 Powder and Telocaset. Thence the trail follows the foothills and along 



