﻿43^ ANODONTA 



Margaron (.hioduiitaj linncana Lua, Syn., 1852, p. 51 ; 1870, 



p. 81. 

 Anodon linneaniis Sowhki'.n', Conch. Icon.. X\'ll, 1870, pi. 



XXXV, fig. 144. 



The type is badly broken, but it docs not seem to nie to stand 

 for tiic fine species which i^ea thoufjiit linncana was. Two 

 specimens have since been received by the National Museum 

 from Mr. \skew from the Colorado River, Texas, one of 

 which is larger, heavier and considerably darker than Lea's 

 shell, and is probably adult. It is more nearly elliptical and less 

 drawn out behind than ,/. stcivartianti and is more nearly 

 e([uilateral. A. lircns is sha{)€d something like this, but it is 

 no doubt a young shell. Its nacre is not brilliant like that of 

 linncana. 



AiN'ODOXTA Gi.oBoSA Lea. 



Shell large, greatly inflated, with high, full and much elonga- 

 ted beaks and umbonal swelling, irregularly elliptical, thin, 

 gaping when adult, beak sculpture doubly looped and subnod- 

 ulous ; posterior ridge low, ending behind in a blunt or round- 

 ed point above the median line ; surface smooth, bright green, 

 banded and faintly rayed when young, grayish-green when old, 

 having three broad rays on the posterior slope; nacre bluish- 

 white, of a brilliant silvery luster and iridescent. 



Length 190. height 140 mm. 



Length ( Lea's type of A. globosa) 100, height y2, diam. 52 

 mm. 



Mexico. 

 Margarita ( Anodonta) globosa Le.\, Syn.. 1836, p. 52. 

 .'hiodonta glohosa Lka, Pr. Am. Phil. Soc. 11. 1841. p. 31 ; Tr. 



.\m. Phil. Soc. \TIT. 1842, p. 241. ])]. xxiv, fig. 56; Obs., 



IIL 1842. p. 70. pi. XXIV. fig. 56. — Ci.KSSix, Conch. Cab. 



Ano., 1875. p. 213. pi. i.xv. figs. 3, 4. — Fischer and Cros.sk. 



Miss. Sci.. IT. 1894. p. ^H), pi. r.xviii, figs, i, ro. — Simpson, 



Syn., 1900. p. C^C\ 

 Anodon globosa Sowicrhv, Conch. Icon.. X\'!l. 1870. pi. xxw. 



tig. 141. 



