37 
6. Lruvconia AURICELLA, Férussac. 
Auricula auricella, Féruss. Prodr. p. 103. no. 5; Kiister, Auricu- 
lacea, p. 47. t. 7. f. 12, 13. 
Genus PLecotrema, H. et A. Adams. 
Shell ovato-conic, solid, umbilicated ; spire elevated, acute ; aper- 
ture contracted, oblong ; inner lip with three plaits, the middle one 
bifid; outer lip with a marginal varix, internally bidentate. (Proc. 
Z. S. 1853. p. 120.) 
1. PLecorremMA sBeuua, H. et A. Adams. P. testa ovato- 
conica, late umbilicata ; spira acuminata, anfractibus gradatis, 
ad suturas angulatis, liris transversis, granulatis, equalibus 
concinne insculptis ; apertura parva, peristomate libero ; labio 
triplicato, plica mediana duplicata; labro intus bidentato, 
extus incrassato, limbato. 
Hab. Philippines. Mus. Cuming. 
4. FurtHer ContTRIBUTIONS TOWARDS THE NATURAL History 
OF THE TROCHID#Z: WITH THE DeEscRIPTION oF A NEW 
GENUS AND OF SEVERAL New SPECIES, FROM THE 
Cumine1An CottectTion. By Artuur Apams, F.L.S. etc. 
(Mollusca, Pl. XXVII.) 
Genus Turcica, A. Adams. (Nov. gen.) 
Shell conoidal, thin, subdiaphanous, imperforate ; whorls with 
transverse series of granules, the last rounded at the periphery ; colu- 
mella solid, spirally twisted at the upper part, ending below or ante- 
riorly in an obtuse prominent point ; outer lip thin, simple, acute. 
This genus is founded on a beautiful trochoid shell from Australia, 
having somewhat the aspect and singular texture of a Ziziphinus ; 
the great peculiarity, however, of the spirally-contorted columella 
distinguishes it from all the species of that genus. 
1. TurcicaA MonitireRA, A. Adams. (Pl. XXVII. fig. 1.) 
T. testa conoidea, subdiaphana, tenui, imperforata, fulva, 
aureo-nitente; anfractibus convexiusculis, cingulis monili- 
Sormibus, transversis, interstitiis oblique striatis, insculptis ; 
suturis canaliculatis ; anfractu ultimo cingula granulorum, in 
serie duplici dispositorum, ornato ; basi convexa, cingulis granu- 
losis granulis nonnullis fuscis instructa ; apertura suborbi- 
culari ; columella superne spirali, antice in dentem desinente ; 
labro margine acuto, intus lirato. 
Hab. Moreton Bay, Australia. Mus. Cuming. 
2. Zizipuinus spectasiiis, A. Adams. (Pl. XXVII. fig. 7.) 
Z. testa conoidea, solida, imperforata, nitida, carneo-fulvescente ; 
anfractibus planulatis, cingulis transversis, moniliformibus, 
granulis albidis, interstitiis subpurpureis, alternantibus ornatis ; 
