1420 ANODONTITES 



I have only seen a single shell of this, the one whose meas- 

 urements are first given, and this was presented to Dr. Lea 

 by Dr. Burroughs. According to Dr. Lea it is a thin shell but 

 the figure shows it to be somewhat solid. It is a more elon- 

 gate and more decidedly rhomboid species than the nearly 

 related .}. strcbelii. 



Fischer and Crosse. (1. c), separate the forms figured by 

 Sowerby in the Conchologia Iconica as var. suharcuatula. But 

 von ]\Tartens, (1. c), remarks that "there is no reason to give 

 it a distinct name." 



Anodontites ijainoicus (d'Orbigny). 



Shell slightly obovate, subrhomboid, convex or subinflated, 

 rather thin, inequilateral ; beaks moderately full, and elevated ; 

 dorsal outline lightly curved ; anterior end narrowed, rounded, 

 sometimes cut away a little below ; base rounded, sometimes 

 a little fuller behind the middle; dorsal slope obliquely trun- 

 cate ; posterior ridge rounded or faintly biangulate, ending at 

 or below the median line, often in a feeble biangulation ; epi- 

 dermis greenish or brownish, often banded, sometimes with a 

 dark ray or two on the posterior end, smooth ; nacre purplish. 



Length 55, height 30, diam. 22 mm. 



Length 60, height 35, diam. 20 mm. 



Patagonia, north to the Amazon ; west to Bolivia. 

 Anodonta limnoica d'ORBiGNY, Guer. Mag., 1835, P- 4°; Voy. 



Am. Mer., 1843, P- ^^9' P^- Lxxix, figs. 1-3 — Cr.EssiN, Conch. 



Cab. Ano., 1874, p. 129, pi. xu, figs. 3, 4. 

 Anodon limnoica Cati.ow and Rekve, Conch. Nom., 1845, P- 



Margarita f Anodonta) limnoica Lea, Syn., 1838, p. 30. 

 Margaron (Anodonta) limnoica Lea, Syn., 1852, p. 50; 1870, 



p. 79. 

 Glabaris limnoicus Simpson, Syn., 1900, p. 921. 

 Anodonta lymnoica Chenu, 111. Conch., 1858, pi. iii, figs, i, 



la, \h. 

 Anodonta puelchava d'ORBiGNY, Guer. Mag., 1835, p. 40; Voy. 



Am. Mer., 1843. p. 620, p1. exxix. figs. 7-9. — Chenu. 111. 



Conch., 1858. pi. II r. figs. 7, ya. — Clessin, Conch. Cab. Ano.. 



1874, p. 130. pi xi.T. figs. 5, 6. 



