223 
8. PotyponTa maria, A. Adams. P. testa turbinato-conica, 
granulata, albida, rubro maculata ac flammulata ; anfractibus con- 
veviusculis, ultimo rotundato, plicato-noduloso, et, ad suturas, cor- 
rugato, granulis in seriebus permultis, equalibus, regularibus, con- 
Jertis, dispositis, basi cingulis granosis exsculpta, cavitate contorta, 
umbilicum mentiente, cingulo elevato, in dente unico terminato, ex- 
hibente ; labro intus sulcato. ; 
Hab. ? Mus. Cuming. 
A very beautiful, finely-granulated species, with the last whorl 
rounded, and having many of the characters of Claviculus, thus 
showing the close affinity of the two genera. 
9. Dostn1a pesHAyest1, A. Adams. JD. testa solida, subventri- 
cosa, cordato-orbiculari, rufescente, albo variegata, concentrice 
lamellosa, lamellis incrassatis, equalibus, lunula profunda, cor- 
data, umbonibus acutis, incurvatis, divergentibus, margine dorsali 
postico declivi, vix arcuato ; intus alba, fascia lata purpurea pos- 
tice ornata ; sinu siphonali obliquo, obtusiusculo. 
Hab. North Australia. Mus. Cuming. 
Like the brown varieties of D. scalaris in size and general appear- 
ance, but the lamellz are sharper and more produced, the valves are 
more ventricose, the lunule is wide, deep and cordiform, the lozenge 
has rugose angulated ridges, and there is a broad purple streak in the 
interior of the valves. 
10. Dostnra coryne, A. Adams. OD. testa solida, cordato-orbi- 
culari, subcompressa, luteo-albida, nitidiuscula, concentrice striata, 
striis confertis, vix lamellosis, incrassatis, equalibus, lunula cor- 
data, valde impressa, area lanceolata profunda, marginibus elevatis, 
acutis ; margine dorsali vix arcuato ; sinu siphonali obliquo, apice 
obtuso ; intus alba. 
Hab. Van Diemen’s Land (Mr. Gunn). Mus. Cuming. 
A solid, rather compressed, and shining species, with the disk of 
the valves nearly smooth owing to the slight elevation of the strize ; 
the colour is pale yellowish white. 
11. Dosrn1a tinEouAtTa, A. Adams. D. testa solida, subventri- 
cosa, cordato-orbiculari, nitida, albido-cinerascente, ad umbones 
rufescente, lineolis radiantibus, interruptis ornata ; concentrice 
plicata, plicis incrassatis, subimbricatis, glabratis ; lunula pro- 
funda, cordata; umbonibus subincurvatis, anteversis, divergenti- 
bus ; margine dorsali postico declivi, arcuato; area lanceolata 
profunda, marginibus elevatis angulatis lamellosis ; intus alba ; 
sinu pallii impressionis acuto. 
Hab. Borneo. Mus. Cuming. 
The hinge in this species is very thick, and the teeth are very 
strong; the interior is strengthened, near the beaks, with a callous 
deposit. The surface is prettily marked with fine, irregular, longi- 
tudinal lines. 
12. Dosinta TRAILLI, A. Adams. D. solidiuscula, subcompressa, 
orbiculato-quadrata, alba, vie equilaterali, umbonibus levibus, 
