1462 MYCETOPODA 



slopingly rounded above, more narrowly rounded below ; epi- 

 dermis smooth, olive-colored. 



Length 121, height 40 mm. 



Bogota ; Colombia ; Ecuador. 

 Mycetopus siibsinuatiis Sowerby, Conch. Icon., XVI, 1868, pi. 



IV, fig. 10. — Cr.ESSiN, Conch. Cab. Ano., 1875, p. 205, pi. 



Lxvii, fig. 3. — vo.v M.\RTENS, Biol. Cent. Am., Moll., 1901, 



p. 540, pi. XLi, fig. 5-50. 

 Mycetopoda siihsinuata Simpson, Syn., 1900, p. 934. 



I have seen specimens of what I believe to be M. siliquosa 

 that approach this somewhat, but none which equal it in the 

 elongated inflation from in front of the middle of the base to 

 near its hinder end. 



Mycetopoda pygm.t];a (Spix). 



Shell much elongated, delicate, thin, convex, narrowed in 

 front, \\ ider behind, gaping at the anterior base ; beaks low ; 

 dorsal line straight ; base slightly fuller in the middle ; anterior 

 end rounded, narrowed : posterior end slopingly rounded 

 above, narrowly rounded below : surface with faint growth 

 lines ; epidermis smooth and shining in front, roughened and 

 reticulated on the dorsal slope, pale amber-color, sometimes 

 tinted green ; nacre bluish, very delicately, radially sculptured, 

 iridescent. 



Length yT,. height 22, diam. 12 mm. 



Brazil ; northward to Nicaragua. 

 ^Uiodon siliqiiosns var. b, py^mcrnm Spix. Test. Fluv. Bras., 



1827, p. 30, pi. XXI] I, figs. 3, 4. 

 Mycetopus pygmceus Sowerby, Conch. Icon.. XVI, 1868, pi. 



II, fig. 4. — Clhssin, Conch. Cab. Ano., 1875, p. 207, pi. lxx, 



fig:- 3- 



Platiris (Mycetopus) pygmceus Lea, Syn., 1870, p. 90. 

 Mycetopoda pygntcea Simpson, Syn., 1900, p. 934. 

 Mycetopus weddellii Hupe, Moll. Nouv., Ill, 1857, p. 93, pi. 



XX, fig. 2. — Sowerby. Conch. Icon., XVI, 1868, pi. 11, fig. 5. 



— Ci.ESSiN, Conch. Cab. Ano., 1875, p. 203, pi. i.xvi, fig. 6. 



