^O Till; A.MKKKAN MIDLAND \ A TC K.\ LIST 



made source-to-mouth surveys of Ohio Valley streams, after having 

 made similar surveys of the most representative streams of the 

 general faunae of this State, especially those of Central and South 

 Missouri, when, during the summers of 19 13 and 19 16, it was the 

 writer's pleasure and profit to survey the Osage and White Rivers 

 from head- waters to mouth by means of a row-boat. The author 

 is especially able to vouch for the report that many species, notably 

 those of the most primitive Ouadrnlae, are generally found to be 

 light, rough, compressed froms in the head waters and to become 

 heavier, smoother and more inflated further down stream; e g., 

 a plicated Ouadrula may exist as a flat, light (conventional) 

 Quadrula undulata (Barnes) in the swifter, shallower head-waters 

 and as the heavy, inflated (conventional) Q. plicata (Say) in the 

 quiet, deeper water nearer the mouth. Then, too, in some instances, 

 it has been observed, especially in the Osage survey, that the nacre- 

 color of certain species, such as Rotundaria tubcrculata (Raf.) and 

 Elliptio dilatata (Raf.), is found to be darker in the upper stream 

 sections and fading out toward the mouth. 



CRITICAL NOTES ON NEW AND OLD GENERA OF 



PLANTS.— IX. 



BY J. A. NIEUWLAND. 



WINTERIA 



Winteria Rehm. is but another way of writing Wintera. 

 The latter name was used by Murray 1 in 1784. Another name 

 should be used for the fungus. There is perhaps some diminutive 

 form available for those who favor such and we refrain from adding 

 a new one even though the available ones Ik- rather undesirable. 



MYRIACTIS 



Kutzing's 2 plant name was preceded by a Myriactis Messing, 3 

 : 1 lie) must receive a new appellation. Gonodia may be suggested, 

 named after Eugene Gonod. 



Gonodia Nom. Nov. 



Myriactis kutz, (1843) 1. c. not Myriactis Lessing. (1831) 1. c. 



Gonodia pulvinatum Now Comix 



1 Murray. Syst. ed. XIV 567 ' 

 Kutzing, !■' '!' . Phyc Gen. (1843 

 Lessing, in Linnaea, V I . 1 .'7. (1831), 



