80 THE NAUTILUS. 



soon as we were out of sight of the town we waded into the river. 

 In the clear water the Unios could be seen and picked up, and in a 

 couple of hours we had collected about 1,000 and returned to the 

 town, and shipped our catch home. By this time the August sun was 

 at a heat of about 92, and we spent the rest of the day trying to 

 keep cool. By the next train we came home, and cleaned up and 

 assorted our booty. They were a rich lot. You lovers of Unio, read 

 the list: 



Uuio multiplicatus Lea. 



Unio trapezoide^ Lea. 



Unio perplicatus Con. with several "aliases." 



Unio purpuratus Lam., very numerous and large. 



Unio anodonloides Lea., rather scarce, and very poor. 



Unio cornutus Barnes. Fine. 



Unio sphaericus Lea. 



Unio refulfirens Lea. 



o 



Uuio hydianus Lea. 



Uuio castaneus Lea. 



Unio gracilis Bar., very abundant. 



Uuio nigerrimus Lea. A very distinct species, and most certainly 

 not subrostratus Say, as has been claimed. 



Uuio cerinus Conrad, scarce. 



Unio askewii Marsh, abundant. 



Uuio chunii Lea, scarce. 



Unio riddellii Lea. This shell is so rare that Mr. Chas. T. Simp- 

 son writes me that these from the Sabine river are the only undoubted 

 specimens he has ever seen (excepting the type). 



Unio asper Lea. 



Unio elegans Lea. 



Unio satur Lea. Another " rara avis." (Some uniologists think 

 this shell to be a variant of U. occidens, but, from the study of 105 

 specimens, I believe it a "good" species.) 



Unio amphiclm?nus Frierson. This is a remarkable shell, and its 

 novelty has now "stood fire" without loss. 



Anodo-ita imbecillis Say. 



Auodouta edentula Say. (From a tributary of the Sabine river, 

 and by odds the largest specimen I have ever seen.) 



Anodonta virens-stewartiana, etc., etc. 



Margaritana confragosa Barnes. 



