ANODON.—P ate XVIII. 
This very flat and board-like species does not appear to 
have been hitherto described by any author. 
Species 69. (Fig. 70, by error, Mus. Cuming in Brit.) 
Anopon Dartensis. An. testd rotundato-subovata, tenui, 
levigatd, inflata, subaurantio-viridi, postice viridi tri- 
radiatd, intus alba; latere postico inflato, obscure 
angulato, margine dorsali subalatd, elevatd, cuneatd, 
margine laterali obliquo, margine terminali subtrun- 
THE 
Lra, 
Hab. 
cato, margine ventrali postice sursum acclivi; latere 
antico subangustato, umbonibus rotundis. 
Darign Anopon. Shell roundly subovate, thin, 
smooth, inflated, slightly orange-green, with three 
ereen rays at the back, white within ; posterior side 
inflated, obscurely angular, dorsal margin subalate, ele- 
vated, cuneate, lateral margin oblique, terminal mar- 
gin subtruncated, ventral margin posteriorly sloped 
upwards; anterior side rather narrow, umboes 
rounded. 
Obs. on Unio, vol. vii. p. 48. pl. 28. f. 99. 
Hopetown, near Darien, Georgia. 
