ANODON.—P tate XX. 
elliptic, tumid, green, obscurely rayed, bluish with- 
Species $1. Mus. ? (copied.) See an ; 
| in, iridescent ; posterior side wider, rather truncated, 
Anopon optusuLa. An. testa tenuiusculd, subelliptica, obtusely biangular, postangular area depressed, sub- 
tumidd, viridi, obscure radiatd, intus subceruled, iri- | excavated, dorsal margin slightly elevated, convex, 
descenti ; latere postico latiori, subtruncato, obtuse bi- terminal margin between the angles truncated, ven- 
angulato, ared postangulari depressd, subeacavatd, mar- | tral margin convex; anterior side subrostrate, dorsal 
gine dorsali subelevato, conveo, margine terminali margin depressed, excavated, umboes ovate, smooth, 
inter angulos truncato, margine ventrali convexo ; la- somewhat prominent. 
tere antico subroslrato, margine dorsali depresso, ex- | Hurt, Castelmaud’s 8. American Expedition; Mollusca, 
cavato, umbonibus ovatis, levibus, subprominentibus. p. 87. pl. 14. f. 3. 
THE LITTLE OBTUSE ANODON, Shell rather thin, sub | fad, Bolivia. 


