272 Occasional Papers Bernice P. Bishop Museum 
Vitrea (?) molokaiensis Sykes, Proc. Mal. Soc. London, ii, p. 298, 1897. 
Fauna Hawaiiensis, ii, Pl. XI, figs. 45, 46, 1900. 
Vitrea (?) hawatiensis Anc., Proc. Mal. Soc. London, vi, p. 120, Pl. VII, 
figs. 8-8b, 1904. 
Nesovitrea pauxillus (Gould). Pl. XXIV, 1; fig. 5. 
Helix pusillys Gould, Proc. Bost. Soc., ii, p. 171, 1846. 
Helix pauxillus Gould, Moll. U. S. Expl. Exped. p. 40, Pl. III, 
fig. 46, 1852. Vitrea pauxillus Sykes, Fauna Haw., ii, Moll, p. 279, 1900. 
Animals of all four species were examined and agreed very closely. 
The foot is light yellowish-white and has well-marked pedal grooves, but no 
tail pore or slit; the central section of the sole is extremely narrow, being 
slightly less than one-fourth the diameter of the foot. 
All the animals examined were rather strongly contracted alcoholic 
specimens. There were no shell-lobes present. The right dorsal lobe in the 
contracted specimens is rather strong, as is also the anterior left dorsal 
lobe; the posterior left dorsal lobe is long and narrow. On the right side 
the collar is uniformly slate-colored, on the left side the collar is a lighter 
gray, and its upper portion is bounded by a dark-gray line. The right side 
of the mantle, from the right margin of the kidney to the intestine, is 
uniformly minutely and densely stippled with dark brown; the portion of 
the mantle covering the kidney is pale flesh-colored; the left side, below 
the kidney, is pale, indistinctly minutely stippled. 
The pulmonary vein is indistinct. In a single specimen were seen 
minute branching veins extending downwards and to the left of the pul- 
monary orifice. 
The generative organs are extremely simple. The albumen gland is 
proportionately large and long and is oblong in outline. The oviduct is not 
tightly twisted. Spermatheca rather small, with a long rather broad duct 
enlarging abruptly at its termination close to the base of the uterus. Penis 
very short and simple, cylindrical, about *% mm. in length, with a long 
slender penial retractor attached at its distal end; vas deferens short, not 
accompanying the penis to its base. 
The right eye retractor does not pass between the oviduct and penis 
as in most snails but between the buccal mass and genitalia. 
The tooth formula is 1-8-3o0. 
