1446 ANODONTITES 



The type of this, according to Dr. Lea, is in the Academy 

 of Natural Sciences at Philadelphia. Several specimens are 

 before me, which ]>robal)ly belong with this species, some of 

 them of the Lea Collection and labeled Anodonta mortoniana 

 by Lea himself. They show more or less transition towards 

 A. ainaconensis. 



AxoDONTiTKS i,(jnginus ( Sjmx ) . 



"Siiell transverse, oblong, almost three times as long as 

 high, anterior end rounded and narrow ; posterior end dilated, 

 very obliquely truncated ; solid, but not heavy ; pellucid ; pos- 

 terior region obliquely angulated, transversely sulcate. Dorsal 

 margin very long, compressed, elevated, and angulated pos- 

 teriorly, obtusely angulate anteriorly : beaks somewhat prom- 

 inent, depressed. Margins acute. Hinge terminating in a 

 small sinulus. Epidermis brownish-green. Interior of shell 

 smooth, pearly, bluish. 



Length 4.7, height 1.7 in." (Spix). 



Type locality, Japura and Solimoes rivers, Brazil. 

 Anodon longinus Spix, Test. Fluv. Bras., 1827, p. 29, pi. xxii, 



fig. I. 

 Mycetopns lotiginiis Clessin, Conch. Cab. Ano., 1875, p. 202. 

 Glabaris longinus Simpson, Syn., 1900, p. 929. 

 Iridina longina Lea, Syn., 1836, [>. 57. 

 Anodonta longina Kuster, Conch. Cab. Ano., 1853, p. 7, pi. 11, 



fig. I. 

 Mycetopoda longina von Ihering. Abb. Senckenb. Ges., 



XXXn, 1910, p. I [9. 



Anoix^ntites iiidalgoi (Germain). 



"Shell of medium size, elongate-subquadrangular, somewhat 

 inflated, slightly gaping at both ends, terminating posteriorly 

 in a short beak, situated very low ; dorsal margin nearly 

 straight, ascending, quite rapidl> inflected from the postero- 

 dorsal angle to the beak in a slightly curved line ; ventral mar- 

 gin scarcely subconvex, very slightly incurved, almost paral- 

 lel to the dorsal margin; anterior region short, rounded, cut 



