934 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XXU. 



(Group of Mycetopoda siliquosa.} 



Beaks in front of the center of the shell ; anterior end evenly rounded ; 

 basal lines nearly straight; posterior ridge quite low. Animal with 

 the characters of the genus. 



t MYCETOPODA SILIQUOSA Spix. 



* Anodon siliquoaua SPIX, Test. Fluv. Bras., 1827, p. 30, pi. xxm, fig. 2. 



* Mycetopoda siliquosus D'ORBIGNY, Guer. Mag., 1835, p. 41. 



* Mycetopus siliquosus D'ORBiGNY,Voy.Am. Mer.,1843, p,601, pl.Lxvn. * HANLEY, 



Test.Moll.,1842,p.224; * Biv. Shells,1843,p.224. *CATLOW and REEVK,Conch. 

 Norn., 1845, p. 69. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 505; III, 

 pi. cxvm, fig. 1. *SOWERBY, Concb. Icon., XVI, 1868, pi. i, fig. 2; in, fig. 

 2a. *CLESSIN, Conch. Cab. Auo., 1875, p. 200. pi. i,xvm, figs. 2-4; LXIX. fig. 

 1. *P.ETEL, Couch. Sam., Ill, 1890, p. 187. *VON IHERING, Arch, fur Nat., 

 1893, p. 56. 



* Platiris (Mycetopus) siliquosits LEA, Syn., 1852, p. 56; 1870, p. 90. 



* Platiris (Iridina) siliquoaa LEA. Syn.. 1836, p. 56; 1838, p. 34. 



* Anodonla siliquosa KUSTER, Concb. Cab. Ano., 1853, p. 35, pl.vni, fig.3. 

 " Mycetopoda siliquosa CHENU, 111. Conch., 1858, pi. i, figs. 2, 2a, 2b, 2c. 



Bolivia, Brazil; south into Argentina. 



* MYCETOPODA OCCIDENTALIS Clessin. 1 



Mycetopoda Occidentalis CLESSIN, Mai. Bl. I, 1879, p. 174, pi. xi, figs. 2, 3. 

 *P.ETEL, Couch. Sam., Ill, 1890, p. 187. * FISCHER, Jl. de Conch., XXXVIII, 

 1890, p. 8. 



Ecuador. 



MYCETOPODA STAUDINGERI von Ihering. 2 



* Mycetopus staudinyeri VON IHERING, Arch, t'iir Naturg., 1890, p. 131, tigs. A, B. 

 Upper Amazon in Ecuador and Peru. 



MYCETOPODA SUBSINUATA Sowerby. 



* Mycetopus sulsinuatua SOWERBY, Conch. Icon., XVI, 1868, pi. iv, fig. 10. "CLES- 



SIN, Conch. Cab. Ano., 1875, p. 205, pi. LXVII, fig. 3. *P,ETEL, Couch. Sam., 

 Ill, 1890, p. 187. * FISCHER, Jl.de Conch.. XXXVIII, 1890, p. 8. 



Bogota; Colombia; Equador. 



t MYCETOPODA PYGM/EA Spix. 



* Anodon siliquosus var. 6 pygmasum SPIX, Test. Fluv. Bras., 1827, p. 30, pi. xxili, 



figs. 3, 4. 



*" Mycelopiis pygma-us SOWERBY, Conch. Icon., XVI, 1868, pi. n, fig. 4. * CLESSIN, 

 Conch. Cab. Auo., 1875, p. 205, pi. LXX, fig. 3. * P/ETEL, Conch. Sam., 1890, 

 p. 197. * FISCHER, Jl. de Conch., XXXVIII, 1890, p. 8. 



* Platiris (Mycetopus) pygmaiua LEA, Syu., 1870, p. 90. 



t Mycetopua weddellii HOPE, Moll. Nouv., Ill, 1857, pi. xx, fig. 2. * SOWERBY, 

 Conch. Icon., XVI, 1868, pi. n, fig. 5.* CLESSIN, Conch. Cab. Ano., 1875, p. 



1 Probably a wide variety of M. siliquoaua. 



2 I have never seen this species, and the author only gives two rough interior out- 

 line figures, but its form is so much like that of siliquosus that I somewhat doubt its 

 specific value 



