ANO 
PLATE 
Species 3. (Fig. 6, Mus. Walton.) 
Finding the name A. fossiculiferus, D’Ors., attached to 
this very thick, black-coated specimen in M. 
Walton’s collection, I was about to assign it a 
place as a distinct species; but a more careful 
comparison convinces me that it represents only 
one of the varied forms and conditions of Anodon 
latomarginatus. 
D’Ors. PI. 2. 
Hab, 8, America. 

Species 99. (Mus. Walton.) 
Awnopon Bernepicrensis. An. testé brevi, altd, inflatd 
tenut, concentricé rugatd, pallide olivaced, ints 
subceruled ; latere postico obscuré biangulato ; 
margino dorsali elevato, cuneato, laterali declivi, 
terminali truncato, ventrali sursim acclivi ; medio 
inflato, umbonibus prominentibus biseriatim undu- 
lato tuberculatis ; latere antico brevi, margine dor- 
sali obtuse cuneato. 
Benepicr’s Anopon. Shell short, elevated, inflated, 
thin, concentrically wrinkled, pale olive, bluish 
within, posterior side obscurely biangular; dorsal 
margin elevated, cuneate, lateral sloped, terminal 
truncated, ventral sloped upwards; middle in- 
flated, umboes prominent with wave-tubercles in 
two series; anterior side short, dorsal margin 
obtusely cuneated. 
Lea. Ann. Ph. Trans., t. xvi. f. 48. 
Hab. Lake Champlain. 
The wrinkled surface and oblique inflation of this 
shell serve to distinguish it. 
Species 100. (Mus. Walpole.) 
Ayxopon aLatus. An. test@ cuneiformi, solidd compla- 
nata, alata, elongata, concentricé irregulariter ru- 
gata, olivaceo-fuscd, iridescenti ; latere postico 
subexpanso perobliqué arcuatim angulatd post 
angulum complanato, margine dorsali elevato, cu- 
neato, laterali obliquo, terminali subacuminato, 
DON. 
XXVI. 
medio umbonibus compressis ; 
latere antico parvo, angusto, margine ventrali 
oblique acclivt. 
THE WINGED ANODON. 
subcomplanato, 
solid, flat, 
irregularly 
Shell cuneiform, 
alated, concentrically 
wrinkled, olive-brown iridescent; posterior side 
elongated, 
slightly expanded, very obliquely angular in an 
arched form, flattened behind the angle, dorsal 
margin elevated, cuneated, lateral oblique, ter- 
minal subacuminated; middle rather flattened, 
umboes compressed, anterior side small, narrow, 
| ventral margin obliquely sloped upwards. 
Lea, Obs. on Unio. 
Hab, Lake Nyassa. 
| 
Species 101, (Mus. Walton.) 
Awnopon Rio-Puatensis. An. testd tenui, oblique ovata, 
levigatd, ampla, pallidissimeé olivaceo-fuscd, prope 
margines viridi-olivaceo saturate fasciald, postice 
nigro sparsim radiata, ints medio salmoned, prope, 
margines cerulescenti ; latere antico angusto, mar- 
gine dorsali recto, cuneato, margine ventrali hianti ; 
medio oblique inflato, umbonibus amplis, regulariter 
concentricé rugosis, rugis tenuissimis ; latere postico 
lato, alato, margine laterali hianti. 
Rio-Piata Anopon. Shell thin, obliquely ovate, 
smooth, full, very pale olive-brown, with deep 
olive-green band near the margin, sparingly rayed 
with black posteriorly, salmon within, in the 
middle bluish near the margins, anterior side 
narrow, dorsal margin straight cuneated, ventral 
margin gaping; middle obliquely inflated, umboes 
full, regularly concentrically wrinkled, wrinkles 
very fine; posterior side wide, winged, lateral 
THE 
margin gaping. 
SowErsy. 
Hab. Rio-Plata. 
Much more oblique than An, Blainvilleana, gaping 
at both ends and having the umboes very finely 
wrinkled. An. sinwatus is a more oblong shell, with a 
depression and sinus in the ventral margin. 

June, 1870. 
