934 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxu. 



(Group of Mycetopoda siliquosa.) 



Beaks in front of tbe 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 siliquoam Spix, Test. Fluv. Bras., 1827, p. 30, pi. xxiii, fig. 2. 



* Mycetopoda siliquosus u'Orbigny, Gner. Mag., 1835, p. 41. 



* Mycetopus siliquosus D'ORBiGNY,Voy.Am. Mer.,1843, p,601, pl.LXVll. — "^ Hanley, 

 Te8t.Moll.,1842,p.224; * Biv. Sbells,1843,p.224.— ^Catlow and REEVK,Conch. 

 Nom., 1845, p. 69.— *H. and A. Adams, Gen. Rec. Moll., II, 1857, p. .505; III, 

 pi. cxviii, fig. 1. — *SowERBY, Concb. Icon., XVI, 1868, pi. i, fig. 2; iii, fig. 

 2a.— «Clessin, Conch. Cab. Aug., 1875, p. 200, pi. lx\-iii, figs. 2-4; LXix, fig. 

 1. — *PiETEL, Couch. Sam., Ill, 1890, p. 187.— * yon Ihering, Arch, fiir Nat., 

 1893, p. 56. 



" Platiris {Mycetopu,s) siliquosus Lea, Syn., 1852, p. 56; 1870, p. 90. 



" Platiris (Iridina) siliquosa Lea, Syn., 1836, p. 56; 1838, p. 34. 



"* Anodonta siliquosa Kuster, Conch. Cab. Ano., 1853, p. 35, pl.viii, fig.3. 



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



Bolivia, Brazil; south into Argentina. 



*MYCETOPODA OCCIDENTALIS Clessin.i 



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 Couch., XXX VIII, 

 1890, p. 8. 



Ecuador. 



MYCETOPODA STAUDINGERI von Ihering.^ 



* Mycetopus simidingeri von Ihering, Arch, tnr Naturg., 1890, p. 131, figs. A, B. 

 Upper Amazon in Ecuador and Peru. 



MYCETOPODA SUBSINUATA Sowerby. 



* Mycetopus subsinuatus Sowerby, Couch. Icon., XVI, 1868, pi. iv, fig. 10.—* Cles- 



siN, Couch. Cab. Ano., 1875, p. 205, pi. lxvii, fig. 3.— *Retel, Conch. Sam., 

 Ill, 1890, p. 187.—' Fischer, .11. de Couch.. XXXVIII, 1890, p. 8. 



Bogota; Colombia; Equador. 



t MYCETOPODA PYGM^EA Spix. 



^Anodon siliquosus var. b pygmceum Spix, Test. Fluv. Bras., 1827, p. 30, pi. xxiii, 



figs. 3, 4. 

 " Mycetopus pygmceus Sowerby, Couch. Icon., XVI, 1868, pi. ii, fig. 4. — * Clessin, 



Conch. Cab. Ano., 1875, p. 205, pi. Lxx, fig. 3. — * P.-etel, Couch. Sam., 1890, 



p. 197.— * Fischer, Jl. de Couch., XXXVIII, 1890, p. 8. 

 ' Platiris {Mycetopus) pygnueus Lea, Syn., 1870, p. 90. 

 t Mycetopus tveddellii Hupe, Moll. Nouv., Ill, 1857, pi. xx, fig. 2.—* Sowerby, 



Conch, Icon., XVI, 1868, pi. ii, fig. 5. — * Clessin, Conch. Cab. Ano., 1875, p. 



' Probably a wide variety of M. siliquosus. 



^1 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 



