THE NAUTILUS. 



talinm pretiosum Nutt., Lutricola alia Cour. and Callista (Amian- 

 tis*) callosa Conr. 



UNIO COLLECTING, BY DR. STRODE. 



On October 1st I went to London Mills on Spoon River, about 40 

 miles up stream in the hope of finding U.capax and U. aesopus,\>ut, 

 was disappointed. I was surprised to find U. undulatus Bar. super- 

 ceeding U. plicatus and U. multiplicatus, so common lower down the 

 stream. M. complanata Bar. was hei*e in great numbers ; U. occidens 

 and U. gibbosus were also quite abundant. 



On Nov. 10th, while on a picuicing expedition at Duncan Mills, 

 20 miles from the mouth of Spoon River, I observed on the oppo- 

 site side of the stream a rocky ledge and beach below extending for 

 quite a distance up and down the river. 



The thought at once struck me that my giant multiplicatus might 

 be once more found here. Accompanied by Dr. Maguire and our 

 wives we crossed over and lost no time in getting into the water 

 among the rocks. Almost the first shell brought up was one of 

 these big fellows. They were here in company with scores of big 

 plicatus, ligamentinns, tuberculatus and a dozen other species. In 

 two hours' time we had found over fifty of the multiplicatus, one 

 good U. capax and one M. confragosa four inches long. The doctor's 

 bird dog Belva, partook of our enthusiasm and manifested a desire 

 to also search for shells. After a little showing she understood how 

 it was done, and it was amusing, indeed to see her with head sub- 

 merged hunting a shell and then after securing it the air of import- 

 ance assumed as she waddled ashore with it. AVe hope, the coming 

 season, to make an expert collector of her. 



One of the most pleasant and profitable collecting trips of the sea- 

 son was made in September at a place called " The Devil's Elbow," 

 five miles below Havana on the Illinos River. At this place the 

 south bank for nearly a half mile is a sand-bar, full of little bayous, 

 and in these places was where we found the Unios. Prof. Hart, of 

 the State Biological Station, who was one of the party, brought with 

 one sweep of his dredge-net over fifty specimens, covering a dozen spe 

 cies. All of the following species were found plentiful, viz.: U. plicatus, 

 U. multiplicatus, U. alatus, U. gracilis, U. pustulosus, U.pustulatus, [7. 

 lachrymosus, U.anodontoides, U. gibbosus, U. ligamentinus, U.ebenus, 

 U. ellipsis, U. solidus, U. donaciformis, U. cornutus, U. elegans, M. 

 confragosa, M. rugosa, M, complanata. A half-dozen U. seciiris 

 were found, the first record of this species for the county. 



