anodontite;s 14^1 



sometimes obliquely subtruncate ; anterior base gaping; epi- 

 dermis concentrically lamellose. showing slight, radial fold- 

 ings/rough and dull, greenish-brown; nacre lurid, greenish or 

 bluish-green, sometimes very dark. 

 Length 80, height 32. diam. 19 mm. 

 Length 57. height 27, diam. 17 mm. 

 Southern Brazil ; southward into Argentina. 

 Mycetopns plicatus Clessin, Mai. P.l., \\ 1882, p. 190 pi iv 



%• 7- 

 Mycetopus clessmi Fischkr. Jl. de Conch., XXXVIH, 1890, 



p. 8, footnote. 

 Glabaris nchringi vox Ihrring, .Arch, fiir Nat., 1893, P- 60. 

 Glnbaris clcssini Simpson. Syn., 1900, p. 930. 



This species varies considerably in form, the posterior end 

 being either obliquel}- rounded or almost sqijarely subtruncate. 

 It is more elongated in proportion to its height than tenebri- 

 cosHs or pastasanus. 



Fischer changed the name plicatus to clessmi because the 

 former name had been used by Sowerby for a species which 

 he (Sowerby) placed in Mycetopus. Sowerby 's shell is a 

 Mutcla, and that of Clessin a Anodontites of the tenebricosus 

 group. Von Ihering applied the name nehringi to the above 

 after Fischer had changed it, and was evidently not aware that 

 the French savant had done so. 



ANODONTrjKs B.KMBousEARUM (Morelet). 



Shell somewhat elongated, subrhomboid, slightly falcate, 

 subioflated, rather solid, inequilateral, with a chestnut-brown 

 epidermis, which is brilliant at the anterior part and sublamel- 

 lose at the posterior end, having a few. black rays ; beaks low ; 

 dorsal line lightly arched; anterior end rounded, a little nar- 

 rowed; base very slightly incurved medially; posterior end 

 slopingly rounded above, more narrowly rounded below ; nacre 

 bluish-white ; muscle scars shallow. 



Length 75. height 40. diam. 24 mm. 



Palenque in Chiapas, Mexico. 

 A}iodon bamboiiscanivi Morei.kt, Test. Nov., U, 1851, p. 24. 



