XEROPHILA NEGLEOCTA. 139 
The STYLOPHORE or dart sacs are basally united, but distinctly bifureate distally, 
they are placed on one side of the oviduct, but only the outer and more muscular 
sac contains a dart, which is of a simple, slightly curved acicular type; the inner 
sac has slighter walls, and recalls the accessory dartless sacs of Hygromia fusca. 
The MANDIBLE or jaw is somewhat crescentic in shape, slightly more than a 
millimetre in width, and about a fifth of a 
millimetre in altitude, with a noticeable, 
rounded, central rostrum or beak; there are 
about eight principal rather prominent and well 
separated transverse ribs, which do not per- 
ceptibly reach the lower or cutting edge, but 
very strongly denticulate the upper margin ; 
each of these principal ribs usually show one or Fic. 214.—Mandible or jaw of Xero- 
: Sega Sa a a wee , : phila neglecta Drap. X 20. 
more subsidiary thickenings, and give a special Mitidesdaemikent 
aspect to the mandible. The whole mandible From apreparation by Dr. E.W. Bowell. 
is of a fawn colour, and shows a darker line ; ; 
near to and parallel with the upper margin, which probably indicates a line of 
attachment to the buecal membrane. 
The RADULA or odontophore is nearly 3 millimetres long, almost a millimetre 
wide, and is said to possess about 94 transverse rows of teeth, each row composed of 
a median symmetrically tricuspid tooth, about ten admedian or lateral asymmetric- 
ally bicuspid teeth, which tend to develop or retain indications of an endoconic 
elevation, and about twenty usually bicuspid marginals, which are still more 
asymmetrical, and towards the margin of the membrane may display an endoconic 
cusp on the membrane. 
ee 
P Vv 
Piel 
\ nd wy 
Fic. 215.—Representative teeth from the radula of Nevophila neglecta Drap., also showing the 
relative position of the cutting points of the next transverse row of denticles, from Luddesdown, 
East Kent, prepared and micro-photographed by Dr. E. W. Bowell, x 360. 
ce. central or median tooth; a. admedian or lateral teeth; #z. marginal teeth or uncini. 
The formula of the radula of a specimen from Luddesdown, prepared and photo- 
graphed by Dr. E. W. Bowell, is 
$9 +72 +4442 4+ 2% x 94 = 5,734 teeth. 
Food and Habits.—Mr. A. 8. Kennard records that nearly all the 
specimens were found high up on the grass stems, resembling in this the 
habit characteristic of Y. gigaviz. 
It is a very shy creature, retiring within its shell at the slightest cause. 
M. Draparnaud states that the animal has a voracious appetite, while Mr. 
Kennard records that it feeds freely upon lettuce and carrot while in 
captivity. 
Geological Distribution.—So far as ascertained it is only known 
fossil by Prof. Pantanelli’s Italian record from the Post-Pliocene Travertin 
at Colle, near Siena, Tuscany. 
Variation.—'he variation in this species has received little attention 
abroad, where it does not appear to be very well known, and as it has only 
been rediscovered in this country a few years ago and is apparently still 
restricted to the very limited original area where it was first found, we 
have naturally little knowledge of the modifications it may be liable to in 
this country. d 
