76 THE NAUTILUS. 



U. eastanem Lea. Xeches River near Tyler, Texas. A compact 

 little shell, described originally from Alabama. Specimens from 

 " Ouichita, Kansas" are also before me. Mr. Simpson called ray 

 attention to the identity of these specimens with the Alabama 

 species. 



U. Houdonensis Lea. West Yegua Creek, Lee Co., Texas. A 

 smooth species of the U. pustulosus group. It is somewhat allied to 

 TJ. petrinus Gld., an unfigured species of which JJ. Bollii Call is a 

 synonym. 



U. nodiferus Conrad. Big Eddy in Neches River near Tyler, 

 Texas. Lea unites this with his Schoolcraftii, but it is apparently as 

 distinct as most of the pustulosus group. 



U. asper Lea. Kickapoo Creek, Henderson Co., and Neches River 

 at Tvler, Texas. This Janus looks on one side toward apiculatus 

 Say, and on the other in the direction of lachrymosus Lea and 

 Jragosus Con. Some queer episodes will sometime be revealed in the 

 family history of the " apieulatidce." The mingling of blood has 

 been something scandalous. 



U. tuberculatus Barnes. Neches River near Tyler, Texas. Some 

 specimens have the tubercles arranged very distinctly in V-shaped 

 rows, as in Unio apiculatus Say. In fact, tuberculatus belongs to 

 this same group, despite its different contour. This shell is found 

 throughout the Mississippi (including Ohio and Missouri) drainages, 

 as well as in the Alabama River. Some southern specimens have 

 the nacre pink, a character I have never observed in Northern 

 shells. 



U. Berlandierii Lea. Colorado River near Austin. This is very 

 closely allied to U. Tampicoensis and TJ. Tecomaiensis of Lea. 

 Belongs to the group of U. crassidens Lam. 



U. purpuratus Lam. Big Eddy in Neches River near Tyler, 

 Texas. Stands between alatus and coloradoensis. Lea gives the 

 correct synonymy. 



TJ. Hydianus Lea. Kickapoo Creek, Henderson Co. ; Neches 

 River near Tyler, and Texarkana, Texas. An apparently distinct 

 species of the ^uieo/u5 type. Varies in color from black to yellow 

 or red rayed with green. The males and females are notably dis- 

 similar in form, as in TJ. luteolus, etc. Compare TJ. approximus 

 Lea. 



TJ. Bealei Lea. Near Forney, Texas. Closely allied to U. Texas- 

 ensis Lea, but the teeth are much more compressed. 



