LAMELLIBRANCHIATA Volupia rugosa 
Defrance, 1829. 
1829. — DErRANCE. Dictionnaire des Sciences Naturelles, T. LVUT, p. 451. 
Atlas. Conchyl. et Malac., PI. XCVIL, fig. 1, 1, 1P, 1°, 14. 
Original figures. 
« VOLUPIE ridée (Def.) 14, 1b. Id. grossie vue en dessus. » 
« 1°, 14. {d. vue en dedans. » 
Type specimens (cotypes). 
[Collection Defrance. Musée d'Histoire Naturelle de Caen]. 
183 
CNE 
— Right valve in profile, from in front ; nat. size. 
i 
C.? — Left valve side view; nat. size. 
C.3 — Right valve (defective) side view; nat. size. 
(CS 
C1 C.X C.% — The same specimens, enlarged six diameters. 
Plesioty'pes. [Collect. of Brazil]. 
P.! Right valve, very young, 5/1. Fresville. P?. Left valve, an umbonal fragment, 6/1. Fresville. 
Restoration of the hinge. Camera drawing by W. H. Dall. 
Fig. 1 
0 upia rugosa Defrance, 1829. 
Fig. 1. — Right valve, very young, enlarged. 
Fig. 2. — Left valve, young, enlarged. 
Fig. 3. — Left valve, adult, enlarged. 
PALAEONTOLOGIA UNIVERSALIS. — 76 
