Aer ee GS eter 
PLaTE X, 
Species 42. (Mus. Sowerby.) 
Aptysia NorFoikensts. Ap. testd corned, fuscd, arcuata, 
ventricosd, obliqué subovata, tenut, levigatd ; apice 
elevato, rotundo, dorso auriculato; margine supe- 
rior declivi, excavato ; labio externo convexiisculo ; 
margine inferiort rotundo ; margine dorsali arcuato, 
rotundo, prope apicem tenuiter reflexo, versits termi- | 
num inferiorem oblique inclinato. 
Norrotk Isytanp Aptysta. Shell horny, brown, 
arched, ventricose, obliquely subovate, thin, 
smooth; apex elevated, round, auriculated at the 
back ; upper margin sloped, excavated ; outer lip 
THE 
rather convex; lower margin rounded, dorsal 
margin arched; rounded, thinly reflected near the 
apex, obliquely inclined towards the lower end. 
Sowersy. 
Hab. Norfolk Island, New South Wales. 
The auricle produced by the reflected dorsal margin 
is more expanded in Aplysia concava than in this 
similarly shaped but differently coloured shell. 
(Copied.) 
Apiysta Ranerana. Api. testd trigono subquadratd, 
planulatd, pellucida, pallida ; apic® oblique pro- 
ducta ; margine superiori depressd, rectd ; labio 
externo recto; margine inferiort breviter quadratd, 
margine dorsali recto, verstis marginem wferiorem 

Species 43. 
inclinato. 
Rane’s Aptysta. Shell trigono - subquadrate, _ flat, 
pellucid, pale; apex obliquely produced ; upper 
margin depressed, straight; outer lip straight ; 
lower margin shortly quadrate; dorsal margin 
straight, inclined towards the lower margin. 
D’Orziany. Voy. Amér. Mérid., pl. 17, f. 11-138. 
Hab. Central America. 

(Mus. Cuming in Brit.) 
Apl. testa membranaced tenurssima, 
Species 44. 
APLYSIA VULGARIS. 
subtrigond, apice acuminato. 
Tue common AptysiA. Shell membranaceous, very 
thin, subtrigonal; apex acuminated, 
Malacologie, pl. 43, f. 8. 
The small fragmentary membrane in the Cumingian 
BLAINVILLE. 

collection is said to have been taken from under the 
mantle of the animal named as above by Blainville. 

Species 45. (Fig. a, b.) (Copied.) 
APLysIA MARGINATA. Apl. testd obliqué subovatd, pal- 
lida, subcomplanata, subarcuatd ; apice producto, 
incurvd ; margine superiori valde declivi, excavato ; 
margine dorsali conveno, prope apicem in auricu- 
lam parvam reflexo; margine terminali obliqué 
producto, rotundo. 
THe BorDERED AptrstA. Shell obliquely subovate, 
pale, rather flat, somewhat arched; apex pro- 
duced, incurved; upper margin much sloped, 
excavated; dorsal margin convex, reflected near 
the apex into a small auricle; terminal margin 
obliquely produced, rounded. 
BLAINVILLE. 
Aplysia punctata. 
Hab. Mediterranean. 
Delle Chaige. 
The shell of this species appears to be much flatter 
and more ovate than that of Aplysia punctata. 

(Fig. a, .) (Copied.) 
APLysIA Lonartcornis. Apl. testd ovatd, ventricosd, mem- 
branaced, succined ; apice productd, incurvd ; mar- 
gine supertori brevi, pauld excavato ; margine dor- 
Species 46. 
sali convexo ; margine terminali rotundo. 
THe LonG-HorNED Aptiysta. Shell ovate, ventricose, 
membranaceous, amber-coloured; apex produced, 
incurved; upper margin short, a little excavated ; 
dorsal margin convex ; terminal margin rounded. 
Rana. Hist. Nat. Aplys., p. 66, pl. 19, f. 3, 4. 
Hab. Mediterranean. 

(Fig. a, 6.) (Copied.) 
APLYSIA UNGUIFERA. Apl. testd vitrad, pellucida, lew- 
gata, complanatd, paulo arcuatd ; apice elevato, sub- 
tortuo, calloso ; margine superiort declivi, rectius- 
culo, ad terminum rotundatim anguloso ; labio 
externo recto; margine inferiori versts labium 
ad terminum 
Species 47. 
acclivi; margine dorsali recto, 
cuneato, 
August, 1869. 
