131 DAVEXPOET ACADEMY OF NATURAL SCIENCES. 



in streams of running water. Tliis is probably a Unio. but I was unable 

 to procure a specimen. — ./. D. P.] 



CORBICULAD-E. 



Sphaerium striatinum, Lamarck. 

 Locality : Utah Lake, Utah. 

 [Se mi-fossil in a mud flat.] 



Pisidium abditum, Haldeman. 

 Locality ; Empire, Col. 

 [Very abundant among the roots of moss and other plants in still water.] 



Mr. J. G. Haupt presented the following report on the first 

 appearance this spring of the various plants mentioned : 



April QTn.—Hejxitica acutiloha^ on hillsides sloping eastward. 



April WTii.—Sanguinaria Canadensis, on Horse Island, and a little 

 later on hillsides sloping northward. 



April lior^.—Populus tremuloides, abundant, but small, north of the 

 city. Capsella bursa-pastoris, a few specimens on roadsides n ear Walcott. 



April 18th. — Popuhis monilifera, near Walcott ; also, near Davenport, 

 April 20th. 



April 2Gru.— Po2mlus grandidevtata, a single small tree in North- 

 west Davenport; quite abundant near the mouth of Duck Creek. 

 Salix petiolaris. 



April •Iinr.— Ulmus fulva. Eanunculus fascicularis, top of hills, on 

 southern slope. Caltlia palustris, very abundant in marshy places be- 

 tween Davenport and Walcott. Acer dasycarpum, the blossoms did not 

 seem fully open until now. Dentaria laciniata, very abundant on Horse 

 Island ; also, to be found on Black Hawk hillsides. Uvularia grandi- 

 flora. Horse Island and around Davenport. Negundo aceroides, is quite 

 plentiful along Duck Creek. It is cultivated to a considerable extent in 

 different parts of the city. Corylus Americana, very abundant; the 

 plants are exceedingly full of pistillate flowers, which promises a bounti- 

 ful harvest of nuts. 



April 28d. — Popndus bahamifera, var. candicans. Draba cuneifolia,a, 

 single plant on C, R. I. & P. R. R., six miles from Davenport. 



April 28tu.— A walk of over twelve miles gave me an opportunity to 

 see quite a number of old friends. With these I found three plants not 

 seen or noted in previous years by Mr. Nagel or myself. Houstonia min- 

 ima. Beck., grows quite abundantly at a rocky spot a mile east of the 

 city. The almost invariable height of the plant was between H and 2 

 inches. The color of the blossoms on different plants varied from purple 

 to almost white, but the stems of all were scabrous, while other charac- 

 teristics also plainly proved them to be H. minima. Amelanchier Cana- 

 densis, var. oblongifolia, T. and G. indicated its presence even in the dis- 

 tance, by its numerous white blossoms. The shrub grows on very rocky 

 soil, near the river bank. JDraba Caroliniana, Walt., is quite common to 

 the upper part of the hillsides for a long distance east of the city. I can 



