APPENDIX TO STKEPOMATID^. 



The Strepomatidee of Alabama seem to be divided into 

 three great groups. The first is characterized by the pres- 

 ence of the genera lo and Angitrema, which are locally re- 

 stricted in this State to the Tennessee Drainage, in which 

 they occur with a preponderating number of species of 

 Trypanostoma, a smaller number of species of Anculosa and 

 StrephobasiJ, and comparatively a few species of Gonio- 



In the Alabama system of drainage comprising the 

 bigbee, Black Warrior, Alabama, Cahawba, and Coosa 

 rivers, and their tributaries, are found a less considerable 

 number of species of Trypanostoma, a single species of 

 Strephobasis, several species of Anculosa, and a preponder- 

 ating number of species of Goniobasis. The characteristic 

 genus of this system of drainage is Schizostoma, which in- 

 cludes a considerable number of recognized species. It is 

 believed that this genus is confined to the Coosa river. 

 Doubts, however, are suggested on that point by the fact 

 that several of the earlier species brought to notice were 

 credited to " Tuscaloosa," and the "Warrior river." No 

 recent information on this point affords any means of set- 

 tling the doubts, though it is hoped that explorations now 

 under contemplation may bring to light conclusive testi- 

 mony relative to the distribution of Schizostoma. 



In the Chattahoochee river and its tributaries, have been 

 found only a few species of Goniobasis, and possibly a sin- 

 gle species of Trypanostoma. 



In the original descriptions of some of the species of Try- 

 anopstoma, and Gonoibasis, found in the State of Alabama, 



