MONOGRAPH OP THE GENUS STROPHXA. 
33 
fine species of Pupa so far from the usual habitat of other members of 
the genus. 
“ T. profundissime umbilicata, elongato-conica, subcylindrica, sol- 
da, alba, laevigata, nitidiuscula, oblique et remote, obsoleteque plicato- 
striata ; spira superne sensim attenuata, apice obtusiusculo ; umbilico 
pevio ; anfractibus undecim subplanulatis, ultimo antice ascendente, 
validus plicato, ab basin compresso ; sutura lineari, irregulariter cre- 
nata ; apertura obliqe truncato-ovata, sublaterali, ab axe deviante, m- 
tus fulvida ; plica columellari profunda, duplicata, paretali elongata, 
remotiuscula ; peristomate valde incrassato, reflexo, subtus latiori, ex- 
tus angulum efformante, dextro medio antrosum arcuato. 
Long. 43 mill. lat. 23; aperturae long, perist. incl. 18 mill. Lat. 
9 millim. Habitat prope Nanking, China. 
Brought by the late Dr. D. King, II. M. S. Cornwallis, and pre- 
sented by him to Dr. Cantor, to whose kindness I am indebted for the 
specimen. A wire introduced into the umbilicus, will reach within a 
short distance of the summit.” 
Shell deeply umbilicated, elongated, cone-shaped ; sub-cylindrical, 
solid, white, smooth, shining, striated folds indistinct, wide apart and 
oblique ; spire, a little sharpened, with the tips somewhat obtuse, um- 
bilicus open ; whirls, 11, even, the upper ascending and strongly pli- 
cated, somewhat compressed ; suture, linea and irregularly crenulated ; 
aperture, oblique, slightly ovate, deviated a little to one side, brownish 
yellow within, tooth on the columellar deep, considerably elongated. 
Peristome, strongly thickened, reflexed a little, expanded laterally, 
without any angle, arched to the right of the center of the entrance. 
43 mill, long by 23 wide ; aperture, including peristome, 18 mill, 
long by 18 wide.” 
GENUS 11. LONGIDENS. 
STROPHIQPS DaLL ( IN PART ) SEE PAGE 33 FOR CITATION. 
Lower tooth greatly elongated, four times as long as high, 
AND ABOUT ONE FIFTH AS LONG AS THE SHELL. UMBILICUS, NEARLY OR 
QUITE CLOSED. APERTURE, NOT WIDELY OPEN. MARGIN NOT FLANGING, 
thickened and beveled. Type S. pannosa. 
The central tooth arises abruptly from the floor of the mouth, 
being narrow, not wider than high, even at the base. The difference be- 
tween members of this sub-genus and those of Strophiop3 lies in the 
long tooth, which is about one fifth as long as the shell, whereas in the 
typeof Strophiops, S . regia, it is only about one eighth as long as the 
