366 Canadian Record of Science. 



Unio Leibii, Lea. 



Detroit River, at the upper end of Fighting Island, 

 collected by Mr. Walker in 1873 or 1874, and identified 

 by the late Dr. James Lewis. 



Unio multiradiatus, Lea. 



Same locality, collector and date as for the preceding 

 species ; also, Thames Eiver, Ontario, from the collection 

 of the late Dr. George A. Lathrop. 



Unio sulcatus, Lea. (=U. perplexus, var. perobliquus, 

 Conrad. Types from Detroit River, and Wabash R., 

 Indiana.) 



Collected by Mr. Walker in the Detroit River at the 

 upper end of Fighting Island, in 1873 or 1874; at the 

 upper end of Belle Isle in 1894 ; and in the same river, 

 at the locality first mentioned, by the Michigan Fish 

 Commission, in 1895. 



Unio verrucosus, Barnes. 



Main channel of the Detroit River off Belle Isle, 

 collected by the Michigan Fish Commission in 1895, and 

 Detroit River opposite Grassy Island, collected by Mr. 

 Walker in 1895. 



Mr. Walker also states that he has, in his collection, 

 twenty-six species of LTnioniclas from the Detroit River 

 and Lake St. Clair, viz., Anodonta Benedictii, A Footiana, 

 A. fragilis and A. subcylindracea ; Margaritana deltoidea, 

 M. Hildrethiana, M. margin ata, and M. rugosa ; Unio 

 alatus, TJ. circulus, TJ. coccin us, TJ. ellipsis, TJ. gibbosus, U. 

 gracilis, TJ. Leibii, TJ. luteolus JJ. multiradiatus, TJ. nasutus, 

 TJ. Novi-Eboraci, TJ. phaseolus, TJ. pressus, TJ. Rangianus, 

 TJ. rectus, TJ. triangularis, TJ. ventricosus and TJ. verrucosus 



Ottawa, July 9th, 1895. 



