ADDENDA. 405 



lat. 1. on 13 to 30 scales; D. X 13, A. II, 7; lat. 1. 42 

 to 56. Colors greenish, with dark specks, no blue or 

 red. Georgia to Texas, lately taken by Prof. Forbes in 

 Southern Illinois. 



On page 247. Many specimens of Elassoma zonatum 

 have been lately obtained by Professor Forbes in South- 

 ern Illinois. The fish, I think, unquestionably forms a 

 separate family, the relations of which are with Aphodo- 

 deridoe^ as indicated in the text. Its pharyngeals are as 

 in Aphododerus; the vertebrae are but 28 in number; 

 the fin rays are usually, D. IV, 10; A. Ill, 5. No speci- 

 mens have been taken more than an inch in length. 



On page 249. The position of the vent in Aphodo- 

 derus isolepis has been found by Prof. Forbes and myself 

 to vary with age, in the youngest specimens being much 

 behind the ventrals; in the adults, at the throat, and 

 intermediate in partly grown specimens. 



On page 264. Zygonectes melanops occurs in South- 

 ern Illinois. 



On page 280. The distinctive character of var. 

 heterura is not well stated in the text. The back is 

 much less arched than in var. cepediana. 



On page 290. In view of the uncertainty attached to 

 the name Hybopsis, it will perhaps be better to use the 

 name Alburnops for genus 6. 



On page 296, after Lythrurus ardens, add : 



4. L. atr/pes, Jordan. DUSKY RED-FIN. A strongly 

 compressed, deep-bodied species, known at once by the 

 coloration of the fins, the dorsal spot being faint, and 

 there being a dusky bar across the upper part of the 



