Cooke—Hawauan Zomitidae and Succineidae 27k 
with a long indistinct inside cutting edge and a short distinct ectocone. The 
inner marginals are distinctly bifid but without denticles on the outer mar- 
gin. The very outermost marginals have about two minute denticles on 
their outer margin. 
The finding of typical specimens of this holarctic genus in the 
Hawaiian shell fauna is hard to explain. There can be no doubt 
that they are endemic to the Territory of Hawaii and not of recent 
introduction, as all the specimens that have been collected were 
found at high altitudes (3000-8000 feet), and the possibility that 
specimens were accidentally introduced in places remote from 
human habitation is very slight. Furthermore the presence of 
this species in the Pleistocene fossil deposits of Waikii, Hawaii, is 
a strong argument against the theory of accidental introduction. 
NESOVITREA new genus 
Vitrea-like snails; whorls about four, the first whorl smooth, the rest 
minutely but distinctly striate. Aperture simple, outer margin thin, sharp. 
Umbilicus rather shallow, perspective showing all the whorls. 
Contracted alcoholic specimens of the animals are without distinct 
shell-lobes, but have a strong right dorsal lobe, an anterior left dorsal lobe 
almost as well developed, and a long narrow posterior left dorsal lobe. 
Lateral pedal grooves are well developed, but there is no indication of a 
tail pore or slit in any of the much contracted animals examined. The 
spermatheca is attached to the base of the uterus very close to the latter’s 
insertion on the clcaca. 
Type Vitrea pauxillus Gld., from Maui. 
The name Nesovitrea is proposed for a small group of very 
closely related species from the Territory of Hawaii. 
Besides the type this genus is made up of the following 
species : 
Vitrea (?) lanaiensis Sykes, Proc. Mal. Soc. London, ii, p. 298, 1897. 
Fauna Hawaiiensis, ii, Pl. XI, figs. 43, 44, 1900. 
*Hawaiia Gude (Gude, G. K., Note on some preoccupied molluscan 
generic names and proposed new genera of the family Zonitidae: Proc. 
Mal. Soc. London ix, p. 272, 1911) was originally based upon Helix kawat- 
ensis Pfr., and was said to equal Hyalina and Pseudohyalina in part. 
H. kawaiensis had been referred to Pseudohyalina by Sykes (Fauna Haw., 
ii, Moll., p. 279, 1900). Mr. Gude subsequently in an undated leaflet pro- 
posed to change the type of Hawaiia to Helix hawatiensis Ancey; but no 
Helix hawaiiensis was ever described by Ancey, nor was this specific name 
ever used by him in Hyalina or Pseudohyalina. We are therefore compelled 
to adhere to Mr. Gude’s original designation of Helix kawaiensis Pfr. as the 
type of Hawaiia. , 
Lie 
