58 TERllESTKIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
black, is not infrequent. The lip is wliite, and the ai)ex frequently tinted with purple- 
black. 
They vary considerably in .shape, as the following measurements will prove : — 
Length 25, diam. 14 mill. 
Length 25, diam. 12 mill. 
TJie average dimension is 25 by 13 mill. Out of about 6000 examples I found 
but one possessing the parietal tooth. Hybrids between tliis species and radiata, 
fiisca and navigatoria are not uncommon. 
On the soutli end of Tahaa, an island inclosed in the .same reef which encircles 
Kaiatea, is the headquarters of Pease’s var. sulxmgvJatu (PI. Ill, fig. 79), which has 
spread throughout several valleys. 
As compared with faha, it is smootlier, more glossy, thinner, and e.xhibits different 
color-variation.s. 'Tlie type is reddisli brown, with a yellowish .sutural l)and, and the 
peristome is jairple-brown, frequently spotted with white. A variety with a narrow 
subsutural and subl)asal band ol a dark chestnut-color on a pale greenish yellow 
ground is not uncommon. Uniform reddish chestnut and pale greenish yellow 
varieties with white lips are fnjquent. lake the typical faha, it is frequently strigatf'd 
and edentate on the wall of the aperture. 
me speciftc centre ol the \ar. avianda = ventriema (PI. Ill, fig. 78) is on the 
northeast ])ortion of Tahaa. where it occurs in the greatest profusion, and has migrated 
throughout all parts of the island, except that portion inhabited by var. s,>hang„lata 
In shape it .lifters none from the latter form, but is frequentlv dentated on the 
panetal wall, and in some valleys on the north coast, the latter c-haraeter is c.mstant 
ght or daik lulvous, with a white or flesh-tinted lip. A beautiful variety occurs 
which has a wide, median, reddish chestnut band. A more common variety is found 
inln ' Chestnut-brown varieties are not uneom 
•non. ihe rarest variety is lasciated the same as the typical faha 
J’. auriculata, Broderip. 
Parlula auriculata, Jtroderip, Proo /nnl loo^ 
Reeve, Conch. Syst., ii, p. 1^5 0 t’ . ^ Syn. Test., p. 33. 
Proc. Zool. Soc., 18G4, p. C75 (part)' ’paetal''cat c’ 
Conch., 186fi, p. 20 . Schnicltz, Cat. Mus. Godeff ' a 
p. 7, with ivoodcut; Obs. Gen Part Rni M ^ Hartman, Cat. Part., 
Parlula Anton, Verz Co„:h.’ ^40 " 
Partulus auriculatus, Beck, Ind. Moll p 53 
Bulimus auriculatus, Pfeiffer, Symb. i n so . 
Buhmus Otaheitanus, Pfeiffer, Mon. Hel ii o’ T I'l 
Partula Otaheitana, Reeve (not of U 
Partula rohusta, Pease, Ms! Coll. Peas^S.’ 
