A NO 
PLATE 
Species 109. (Mus. Walpole.) 
Avnopon Normanpr. An. testd parva, elongato-ovatd, 
compressa, levigatd, pallidé cupred, viridi flavido- 
que fasciata ; latere antico brevi, angusto, margine 
dorsali recto, cuneato, margine ventrali sursim 
acclivi ; latere postico producto, latidsculo, obtuse 
angulato, post angulum depresso, margine dorsali 
recto, alato, cuneato ; margine laterali obliquo, ad 
marginem ventralem acuminato. ; 
Tue Normanpy Anopon. Shell small, elongated-ovate, 
compressed, smooth, pale copper-coloured banded 
with green and yellow, anterior side short, narrow, 
dorsal margin straight, cuneated, ventral margin 
sloped upwards; posterior side produced, rather 
the 
angle, dorsal margin straight, winged, cuneated; 
wide, obtusely angular, depressed behind 
lateral margin oblique, acuminated at the ventral 
margin. 
Anaas. Hist. Nat. Moll. d’Alger. Atlas, pl. eviii. 
Hab, France. 

Species 110. (Fig. a, b, Mus. Walpole.) 
ANODON QuapripLicatus. An. testd subrhomboided, in- 
Slata, tenuissimd, levigatd, fulvo-rufescenti, posticé 
nigrescenti, nonnunquam radiata, int&s prope 
umbones salmoned ; latere antico angustiisculo, 
brevi, margine dorsali brevi, depresso, excavato ; 
latere postico lato, angulato, post angulum obscuré 
unrcostato ; umbonibus prominentibus, incurvis. 
plicts magnis tribus ad quatuor armatis ; margine 
ventrali rectitisculo. 
THE FOUR-PLAITED ANODON. subrhomboidal, 
inflated, very thin, reddish-brown, 
blackish behind, sometimes rayed ; salmon within 
near the umboes; anterior side rather narrow, 
short, dorsal margin short, depressed, excavated ; 
posterior side wide, angular, with one obscure rib 
behind the angle; umboes prominent, incurved, 
armed with three or four large plaits; ventrical 
margin rather straight. 
Shell 
smooth, 
Sowerpy. 
Hab. Potomac River. 
A very interesting little species, having the beaks 
incurved, and an excavation in front of them. 
DON. 
XX VII. 
Species 111. (Mus. Walpole.) 
Anopon Marryarranus. An. testd ovata, 
oblongatd, tenui, pallidé olivaced, posticé oblique 
costata, iridescenti 
subceeruleo ; latere postico oblique producto, ad 
oblique 
radiata et  obscuré intus 
terminum truncato, margine ventrali convexo ; 
medio oblique inflato ; latere antico brevi ; wmboni- 
bus inflatis, obliquis, tuberculatis. 
Marryatt’s Anopon. Shell ovate, obliquely oblong, 
thin, pale olive, posteriorly obliquely rayed and 
obseurely ribbed, iridescent bluish within; pos- 
terior side obliquely produced, truncated at the 
end, ventral margin convex; middle obliquely 
inflated, anterior side short, umboes_ inflated, 
oblique, tuberculated. 
Lea. Obs. on Unio, vol. iii. pl. 20, f. 45. 
Hab. Mississippi; Buffalo Creek, Tennesse. 
Species 112. (Mus. Walpole.) 
Anopon Wituiamsi. An. testd tenuissimd, laevigata, 
compress, lata, anticé pallidé fulvd, viridi fasciatd 
posticé vivide viridi ; latere antico angusto, brevis- 
simo, semirotundo, medio oblique inflato, umbonibus 
leviter tuberculatis, latere postico obscure biangulato, 
lato, margine dorsali elevato, alato; margine 
laterali hianti. 
Wituiams’ Anopon. Shell very thin, smooth, com- 
pressed, wide, anteriorly pale fulvous banded 
with green, posteriorly bright green, anterior 
side narrow, very short, half rounded; middle 
obliquely inflated, umboes lightly tuberculated ; 
posterior side obscurely biangular, wide,with dorsal 
margin elevated, winged, lateral margin gaping. 
Lea. Obs. on Unio, vol. x. pl. 44, f. 294. 
Hab. River Potomac, Georgia. 
A beautiful specimen of this rare little shell is here 
figured from the collection of Mr. Walpole. 

Species 113. (Mus. Walpole.) 
Awnopon Catirorniensis, An. testd parva, lata, com- 
pressd, subtrigond, tenui, viridi-olivaced ; latere 
antico angusto, brevi; medio radiatim expanso, 
umbonibus undato-plicatis ; latere postico lato, eb- 
scuré biangulato, margine dorsali alato, cuneato, 
elevato. 

June, 1870. 
