CATALOGUEFAMILY U 



a biologic expression of differences in environment. The specific distinction ho- 

 tween this and several other forms is not clearly established. It is the type of a 

 group including A. decora, A. virens, A. linnc&intt, A. corpulenta, A harpt- 

 thenxis, and A. plana, some of which are certainly synonymous. Lea's figure 

 of A. plann, (which see) is a very good illustration of gmndis. 



t Anodonta liarpethensis, Lea. 



(Trans. Am. Phil. So?.. 2nd Series. Vol. VIII, PI. XIX, Fir. 4?.> 

 Harpeth river, Tennessee, the only locality yet reported. See under yraiulin. 



* Anodonta imbecillis, Say. 



(Trans. Am. Phil.Soc., Vol. V, PI. VI, Fig. 6. Figured as Anodonta, incerta, Lea.) 

 Ranges from Central New York to Georgia, to Texas, to Iowa. The great 

 fragility of this species and its brilliant green epidermis will serve to readily dis- 

 tinguish it from all other Anodontcc. 



\ Anodonta limiu'iina, Lea 



/Trans. Am. Phil.Soc. 2nd Series, Vol. X., PI. XXVII, Fi. .">] ) 



"Lake Concordia, Louisiana." This species is a member of the tjrinidis 

 group. Its specific value is questionable. 



\ Anodonta oblita. Lea. 



(Trans. Am. Phi!. Soc. 2nd Series, Vol. X, Pi. XXV11I, Fig. 5.'.' 



Campbell county, Tennessee. This form, which is a member of \\\v fcrrutsa- 

 ciana group, is certainly synonymous with A. denigratn, Lea 



\ Anodonta opaca, Lea. 



(Trans. Am. Phil. Soo. 2nd S?r:es, Vol. X.. PI. XXV, Fi<r. W.> 



Near New Orleans, Louisiana, and Little Rock, Arkansas. This and ./I. # f <- 

 Lea, are synonymous. 



\ Anodonta ovata, Lea. 



(Tran>. Am. Phil. Soc., Vol. VI. PI. II, Fiji. 2.i 



Ranges from Ohio and Wisconsin to Jackson. Mississippi. Specimens doubt- 

 fully referred to this species have been taken in Lake Okobodji, nortliwewtein 

 Iowa. This form groups with yravulin. 



+ Anodonta pavonia,, Lea 



(Trans. Am. Phil. Soc., Vol. VI PI. XXI, Fijr. ">.) 



Ohio and Indiana. 'Ibis species is a member of the cdcntnln grouj), from 

 CATAT.HJUK 4. 



