94 
TKRllESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
thin, concolorccl, and the surface is generally more or less eroded. The basal keel is 
not so distinct as in the typical species inhabiting the western groups. 
0. PRODUCTA, Pease. 
Itealia producta, Pease, Proc. Zool. Soc., 1864, p. 673. Pfeiffer, Mon. Pneum., iv, p. 217. 
Omphalolropis producta, Pease, Jour, de Conch., 1899, p. 151, PI. \ II, fig 8. 
A tropis producta, Pease, Proc. Zool. Soc., 1871, pp. 471, 476. 
Realia elongala. Pease, Amer. Jour. Conch , 1867, p. 225. Pfeiffer, Mon. Pneum., iv, p. 218. 
Omphalotropia elongata, Pease, Jour, de Conch., 1869, p. 152, PI. VII, fig. 4 ; 1871, p. 95. 
Atropis elongata, Pease, Prec. Zool. Soc., 1871, p. 476. Schmeltz, Cat. Mus. Godetf., v, 
p. 101. 
Realia scitula. Carpenter (not of Gould), Proc. Zool. Soc., 1864, p. 676. 
Hydrocena Raiatensis, Mousson, Jour, de Conch., 1869, p. 67, PI. V, fig. 5. 
Realia Raiatemns, Pfeiffer, Mon. Pneum., iv, p. 215. 
This variable species is confined to Raiatea and Tahaa, where it is found on the 
ground in forests, and is widely diffused over both islands. 
Mr. Pease’s measurement, 10| mill., is probably a mistake. I have now before 
me over 500 examples, the largest of which is 9, and the smallest adult is 6 mill, in 
length. The first has eight, and tlie latter seven whorls. I note the following colors ; 
whitish, pale lutcous, corneous, different shades of brown, reddish brown, and very 
rarely with a narrow transverse reddish band on the body-whorl. The aperture varies 
from jiale yellowish white to dark ochraceous, sometimes reddish brown or whitish. 
Tlie penultimate whorl is frequently slightly exserted over the body-whorl, which 
latter is rounded, very rarely subangulated, and the base very narrowly perforatc'd or 
rimate, but not keeled or angulate. The epidermis, which is very rarely present, is 
thin and smooth. Sometimes the peristome is considerably expanded and tbe lip 
duplicated. There is also considerable variation in the convexity of the whorls 
Mr. Pea.se’s which he first described, differs none from his eiovffa/u, except 
having the whorls more flattened, a character which gradually merges into the latter 
species. I he same variation obtains in Borahorensis txndC terehralis. 
0. Boraborensis, Dohin. Plate HI, flg. 60. 
“7n5°'TLf7''Tt' "• «»■’■ I’"""”-, ‘ii. 
P. 175. I ease. Jour de Conch., 1869, p. 151. Schmeltz, Cat. Mus Godeff v n 208 
Atrop^s Boraborensis, Pease, Proc. Zool. Soc., 1871 p 476 ’ ’ 
Reaha Boraborensis, Pfeiffer, Mon. Pneum., iv p 217 
midd^ who* 
pole corneous, soinetimes widtir hr ^'"7 
or less distindv ongllTela “ mL m" ” "r”* 
keel which winds up tlie spire Th l"' '''■'=9"™")' "'i'll a thread-like 
>P spire. The penultimate whorl is often imbricated or e.vserted. 
