CORRECTIONS IN BOTANICAL NOMENCLATURE ao 
of Red Wing, Minn., and in Lake Pepin. There is a decline 
in the number of the mussels in succeeding stretches of the 
river until the lower half of Lake Pepin is reached. Upon 
leaving the lake, a most marked diminution in their numbers 
occurs but on the other hand the absolute number of shells 
increases going down stream, showing that the necessary 
conditions for mussel life are present, and, on the whole,~ 
steadily improving. When it appears practicable to attempt 
the rehabilitation of the mussel beds below Lake Pepin, the 
following recommendations based upon the preceding infor- 
mation may receive consideration, viz: 
1. Restoring old, but favorably situated beds in closed 
areas with advanced juveniles of commercial species. Such 
beds are those existing at the foot of Lake Pepin, Wabasha, 
Teepeeota Point, and those at Winona and Homer, Minn. If 
judged by the abundance of juveniles collected, the areas to 
be stocked in order are VI, VIII, IV. 
2. Restocking and propagation. of desirable species in cer- / 
tain sloughs, both in open and closed areas, as the young shells 
in the former case would be protected by the prevailing sen- 
timent among mussel fishermen toward them. Sloughs offer- 
ing some promise in this respect are the Belvedere below 
Minneiska, West Newton Chute near Alma, and the Straight 
Slough near Winona. 
Corrections in Botanical Nomenclature. 
OLIVER ATKINS FARWELL. 
Dilepyrum erectum (Schreb.) N. comb. Muhlenbergia 
erecta Schreb., Besch. Gras. II 139. pl. 50 (1772-9). Dilepyrum 
aristosum Mx., Fl. Bor. Amer. 1:40 (1803). 
Mr. A. S. Hitchcock, in The Genera of Grasses of the United 
States, (U. S. Dept. Agriculture Bulletin No. 772) p. 145, 
(1920) places the genus Dilepyrum Mx. as a synonym of 
Muhlenbergia Schreb. and remarks that either of Michaux’s 
species are equally eligible as the type and that the second 
