ANODON. 
PLATE 
Species 87, (Mus. Dunlop.) 
Anopon Dunuoprana, An. testd inflata, tenud, oblique 
ovata, stramined, viridi concentricé fasciatd, lineis 
et fasciis angustis, obscuré radiata; intis alba 
tridescenti; latere postico obscuré biangulato, 
extremitate subtruncato; margine dorsali recto, 
elongato, obtuse angulato ; margine ventrali equa- 
liter valde convexo; latere antico rotundato, 
breviusculo ; umbonibus prominulis, ad apices 
undulatis. 
Duntop’s Anopon. Shell inflated, thin, obliquely ovate, 
straw-coloured, concentrically banded with green 
obscurely rayed with lines and narrow bands; 
posterior side obscurely biangular, subtruncated 
at the end; dorsal margin straight, elongated, ob- 
tusely angulated; ventral margin equally very 
convex; anterior side rounded, rather short ; 
umboes prominent, undulated at the apices. 
Lea. Obs. on Unio, III. pl. 86, p. 27, f. 65. 
Hab. South Carolina. 

Species 88. (Fig. a, b, Mus. Sowerby.) 
ANODON BIANGULATA, An, test@ parvd, donaciformi, 
tenui, fuscd-nigricanti, subrugosd, valdé inequi- 
laterali, inttés cupred ; latere postico inflato, lato, 
valide radiatim biangulato, supra angulos pland, 
elevatd, angulos truncato; latere antico 
angusto, compresso, brevissimo, subacuminato ; 
inter 
margine ventrali recto. 
THE BIANGULATED Awnopon. Shell small, wedge- 
shaped, thin, blackish-brown, subrugose, very in- 
equilateral, copper coloured within ; posterior side 
inflated, wide, strongly radiately biangular, flat, 
elevated above the angles, truncated between the 
angles; anterior side narrow, compressed, very 
short, subacuminated, ventral margin straight. 
Sowerby. 
Hab. 

(?) 
Strongly resembling Anodon angulata, Lea, but with 

XXIII. 
an additional angle posterior to the more elevated one 
which reaches the ventral margin. 

Species 89. (Mus. Sowerby.) 
Awopon Hatiensecku. An. testd lata, subcompressd, 
oblongo-subquadratd, crassiusculd, flavidd, fasciis 
olivacetis cinctd, olivaceo-fusco ad latere adum- 
bratd ; latere postico obscurissimé biangulato ; 
margine laterali declivi ; margine dorsali elevato, 
recto ; medio depresso, ad marginem ventralem 
subcontracto ; latere antico lato, brevi, superne 
cuneato ; umbonibus haud prominentibus. 
Hatensecn’s Anopon. Shell broad, compressed, ob- 
long-subquadrate ; rather thick, yellowish belted 
with olive bands, shaded at the sides with olive- 
brown; posterior side very obscurely biangular, 
lateral margin sloped, dorsal margin elevated, 
straight; middle depressed, slightly contracted at 
the ventral margin; anterior side broad, short, 
cuneate above ; umboes not prominent. 
Lea. Obs. on Unio, 7, pl. 1, p. 50, pl. 32, f. 112. 
Hab. Uphaupee Creek, County Macon, Georgia. 

Species 90. (Mus. Castelnaud.) 
ANODON LinGuULATA. An. testd ovato-oblongd, solida, 
valde inequilaterali, olivaceo-viridi; intus albd, 
aridescenti ; latere postico producto, angulato, ad 
terminum infra margine ventralt 
moderate convexo ; latere antico breviusculo ; mar- 
acuminato ; 
gine dorsali declivi ; umbonibus ovatis, convexis. 
THE LinGuLATE Anopon. Shell ovate-oblong, solid, 
very inequilateral, olive-green; white within, 
iridescent ; posterior side produced, angular, acu- 
minated below at the end; ventral margin mode- 
rately convex ; anterior side rather short, dorsal 
margin sloped; umboes ovate, convex. 
Hurk. Expéd. Amérique du Sud, p. 89, pl. 18, f. 1. 
Hab. Paraguay. 
Remarkable for its long pointed, elliptical form. 
August, 1869. 
