AS NFOlDE ON: 
Prate IV. 
Species 8. (Mus. Cuming in Brit.) 
ANODON HIANS. 
simd, castaned, concentricée leviter rugatd, intis mar- 
garitaced, anticé late hianti; latere antico brevi, acu- 
minato, margine dorsali brevi, recto, ad terminum an- 
An. testd obliqué ovata, solidd, lavis- 
gulato, margine ventrali sursim acclivi, subcontracto ; 
latere postico producto, expanso, amplo, ad terminum 
acuminato, margine dorsali recto, elevato, ad terminum 
angulato, margine laterali obliquo, margine ventral 
valide sursitm acclivi, infra inflato, umbonibus tumidis. 
THE GAPING ANODON. Shell obliquely ovate, solid, very 
smooth, chestnut, concentrically lightly wrinkled, 
pearly within, widely gaping in front; anterior side 
short, acuminated, dorsal margin short, straight, an- 
gular at the end, ventral margin sloping upwards, 
slightly contracted; posterior side produced, ex- 
panded, full, acuminated at the end, dorsal margin 
straight, elevated, angular at the end, lateral margin 
oblique, ventral margin strongly sloping upwards, 
inflated beneath, umboes tumid. 
SOWERBY. 
Hab. ——? 
A very beautiful shell in the collection of the late Mr. 
Cuming, without stated locality. Remarkable for the 
wide hiatus of the valves. 

Species 9. (Mus. Cuming in Brit.) 
Anopon scriptus. Az. testd oblongd-subovali, levis- 
simd, solidd, castaned, intus margaritaced, medio et ad 
latera strigis angulatis et undulatis purpureis notata ; 
latere antico brevi, contracto, margine dorsali brevi, 
concavo, ad terminum angulato, margine terminali 
rotundo, margine ventrali antice hianti, contracto, pos- 
tice expanso ; latere postico producto, inflato, termino 
acuminato, margine dorsali elevato, recto, wmbonibus 
rotundis. 
Tur wrirren Anopon. Shell oblong-suboval, very 
smooth, solid, chestnut-coloured, pearly within, 
marked in the middle and sides with angular and 
undulating purple stripes ; anterior side short, con- 
tracted, dorsal margin short, concave, angular at 
the end, terminal margin rounded, ventral margin 
gaping, contracted in front, expanded behind; pos- 
terior side produced, inflated, acuminated at the enc, 
dorsal margin raised, straight, umboes rounded. 
FPERUSSAC. 
Hab. ? 
This handsome pearly species belongs to the same 
group as Anodon or Leila Blainvilliana, having a thick- 
ened hinge and gaping sides. It is remarkable for the 
angular purple markings of its pearly interior. 


April, 1867. 
