I416 ANOnONTITES 



patus. but, according to the description, it is a solider, imiu. 

 inflated form, and is perhaps a Httle darker colored. I feei 

 sure that it is an Anodontites belongine: to the crispatus group. 



Anodontites Piiii.iPPTANUs (Simpson). 



Shell decidedly trapezoid, scarcely subsolid, rather com- 

 pressed ; inequilateral; beaks moderately full and elevated; 

 dorsal outline lightly arched ; dorsal slope obliquely truncate ; 

 anterior end narrowed, rounded ; base very slightly incurved 

 medially ; posterior ridge full, rounded, ending in a rounded 

 point at the base of the shell ; surface striate and subrugose ; 

 epidermis yellowish-green; nacre bluish-white. 



Length 53, height 32, diam. 18 mm. 



Ucayali River. Peru. 

 Anodonta subsiniiata Philippt, Mai. BL, X\'I, 1869, P- 4i- — 



Pfeiffer. Nov. Conch., Ill, 1869, p. 487, pi. cv, figs. 7, 8. 

 Glabaris philippianus Simp.son, Syn., 1900, p. 919. 



According to the outline figure giving a dorsal view of this 

 shell it is compressed along the middle. The statement that 

 the surface is rough and wrinkled would seem to show that 

 it belonged in this group. The species is more rhomboid in 

 outline than A. crispatus and is apparently more greenish in 

 color. 



The name subsinuata, applied to this by Philippi, will have 

 to be placed in the synonymy, as Sowerby used it previously 

 for an Anodontites which he placed in Anodonta. 



Anodontites napoensis (Lea). 



Shell irregularly elliptical, oblong, solid, convex, inequilat- 

 eral ; dorsal outline strongly and almost evenly curved from the 

 narrowed anterior end to the end of the posterior ridge ; base 

 line but slightly curved ; surface having irregular growth lines ; 

 epidermis marked with radial rows of fine, zigzag wrinkles, 

 almost black at the border, lighter colored at the umbonal re- 

 gion; muscle scars deep, the anterior ones large; nacre lurid 

 greenish. 



Length 62, height 32, diam. 19 mm. 



River Napo, Ecuador. 



