﻿444 J.liGUMl.NAIA 



Legiiuiinaia rliDinhoidca K(M!i;i.t. Icon., new ed., \ I, 1893, p. 



94, pi. CLXxviii, figs. 1 124, 1125. 

 Unio rhomhoidcHS So\vkki:y, Conch. Icon.. X\ I, 1868, pi. 



Lxxxix, fig. 480. 



Psctidodon rhomhoidciis Westurlund, Fann. Pal., II, j)!. vii, 

 1890, p. 183. 



Lea's Monocondykco rhomhoidca is rei>resente(l in his col- 

 lection hy a couple of opposed, matched valves, which seem 

 to he identical with the Unio cliurchilliainis of llourguignat. 

 One of these is more decidedly rhomhoid and angular than the 

 other. The s])ecies is shorter and much more rhomboid than 

 (7. oppcrti or G. pseiidodopsis. 



Kobert. (1. c. p. 3). has proposed a new genus for the species 

 of Cabillotia from Asia Minor under the name of Pscudo- 

 dontopsis, with this .species as the type. 



Genus LEGUMINAIA Conrad, 1865. 



Lciniminaia Conrad, Am. Jl. Conch., I, 1865, p. 2^^. 

 Microcondylcca Vest, Yehr. Mitth. Sieben. Ver. Nat., 1866, p. 



20T. 

 Microcondylus Drouet, Jl. de Conch., 1879, p. 138. 



Shell rhomboid-elliptical, slightly biangTilate behind ; pos- 

 terior ridge faint and double ; beaks anterior, sculptured with 

 fine, concentric ridges, which are sometimes slightly corru- 

 gated, but which show a tendency to form two rounded loops; 

 surface smooth or with very faint corrugations on the pos- 

 terior slope; epidermis rayless or nearly so; a single tooth in 

 each valve, that in the left under the beak, that in the right in 

 front of it, teeth smooth ; epidermal and ligamentary matter 

 mingled with the nacre along the hinge; the two front anterior 

 muscle scars united, the hinder distinct, posterior scars faint : 

 beak cavities shallow ; dorsal scars few, irregularly disposed. 



Animal with the outer hranchia? adherent to the mantle 

 throughout their entire length; inner free from tlie alulomin.nl 

 sac. (Drouet.) 



Type. Monocondylcca mard'mcnsis Lea. 



