ACN O 
DYOUN:. 
PLATE As 
Species 29. (Mus. Cuming in Brit.) 
ANODON PALLIDUS. 
flatd, oblongo-ocatd, postice strigis tenuibus radiatd, 
An. testa pallidé olivaced, tenui, in- 
ints albidé; latere antico brevi, angusto, supra 
subangulato, margine ventrali sursum acclivi, medio 
subinflato, umbonibus acute undulatis ; latere postico 
oblique producto, expanso, subangulato, margine ven- 
trali inflato, margine dorsali elecato, recto, margine 
lateral obliquo, terimino subacuminato. 
THE PALE ANopon. Shell pale olive, thin, inflated, 
oblong-ovate, rayed posteriorly with thin stripes, 
inside whitish; anterior side short, narrow, slightly 
angular above, with ventral margin sloping upwards, 
middle rather inflated, with umboes acutely waved ; 
posterior side obliquely produced, expanded, sub- 
angular, ventral margin inflated, dorsal margin ele- 
vated, straight, lateral margin oblique, rather acumi- 
nated at the end, 
ANTHONY. 
Hab. Michigan. 


Species 30. (Mus. Cuming in Brit.) 
ANODON UNDULATUS. An. testé tumidd, subquadraté, 
brevi, substriatd, obscuré fusco-olivaced, intits pailidé 
luted et caruled, margine cardinali prope wnbonem 
tncrassato et subundato; latere antico brevi, rotun- | 
dato, supra angulato, medio recto, umbonibus acuté 
undatim tuberculatis ; latere postico angulato, lato, 
recto, late truncato, radiato. 
THE UNDULATED ANovoN. Shell tumid, subquadrated, 
short, substriated, obscurely brown-olive, within pale 
yellow and blue, with hinge-margin thickened and _ 
subundated ; anterior side short, rounded, angular 
above, middle straight, umboes acutely tuberculated ; 
posterior side angular, wide, straight, widely trun- 
cated, rayed. 
Say, Enc. Am. 4. t. 3. f. 6. 
Anodonta Pennsylvanica, Lamarck. 
Anodon rugosus, Swainson. 
Hab, Michigan. 
Of an oblong-square form and dull smoky colour, with 
sharp undulated tubercles on the umboes. 
June, 
Species 31. (Mus. Cuming in Brit.) 
ANODON ENSIFORMIS. An. testd angustd, elongata, 
crassa, olivaced, postice nigrescenti, intls vivide iri- 
descenti ; latere antico breviusculo, subquadrato, medio 
complanato, margine ventrali recto; latere postico 
elongato, angulato, ad angulum concentric? rugato, 
post angulum peroblique unisulcato, margine dorsali 
recto, margine laterali obliquo, termino truncato. 
THe ENstrorm ANopoN. Shell narrow, elongated, 
thick, olive, very dark posteriorly, brilliantly irides- 
cent within; anterior side rather short, squarish, 
middle flattened, with ventral margin straight; pos- 
terior side elongated, angular, concentrically wrinkled 
on the angle, with one very oblique groove behind 
the angle, dorsal margin straight, lateral margin ob- 
lique, truncated at the end. 
Sprx, Test. Brazil, t. 24. 
Hab. Brazil. 
This beautiful little species has rather the external 
aspect of a Unio. 

Species 32. (Mus. Cuming in Brit.) 
Anopon CoupErtanus. An. testé tenui, inflata, ovali, 
lecigatd, medio subaurantid, prope umbones cupred, 
Jasciis posticé latis, anticé angustis vividis radiata, 
intus flavidd ; latere antico brevi, rotundo, umbonibus 
haud prominentibus, margine ventrali subaequaliter 
convexo ; latere postico valde inflato, termino subacu- 
minato. 
Covurrer’s ANopON. Shell thin, inflated, oval, smooth, 
rather orange-tinted in the middle, copper-coloured 
near the umboes, rayed with broad bright bands be- 
hind and narrow ones in front, yellowish within ; 
anterior side short, rounded, the umboes not pro- 
minent, ventral margin nearly equally convex; pos- 
terior side much inflated, the end rather acuminated. 
Lea on Unio, vol. ii. pl. 20. f. 46. 
Hab. Hopetown, near Darien, Georgia. 
| The umboes in this much-inflated 
prominent as scarcely to modify the 
species are so little 
straightness of the 
dorsal outline. 

Species 33. (Mus. Cuming in Brit.) 
Anovon Javona. dn. testd compress, lanceolata, tenut, 

1867. 
