150 LAND AND FRESHWATER 
The foot is truncate behind (fig. 4), with a slight overhanging 
lobe and a linear gland just reaching to the sole of the foot. This 
is divided below into a central area with a lateral margin. 
The generative organs (Plate XX XVIII. fig. 1) are simple, the 
amatorial organ being large, showing, when the outer sheath is re- 
moved (fig. 1 @), a blunt cylindrical sagitta or dart with longitudinal 
muscular ribbing. The intestine (fig. 15) shows a large swollen sac 
near the cesophagus laid open by the salivary gland. The pulmonary 
chamber is very capacious. 
The teeth of the radula are arranged thus :— 
50 Sas A elt Dei 
6p wha 6d 
Similar to Macrochlamys indica, but the outermost laterals be- 
coming gradually very small, the inner point the longest. 
AUSTENIA BENSONI, Pfeiffer. (Plate XXXVI. figs. 6-7 6.) 
Locality. Jessore (G.-A.). 
Vitrina bensoni, Pfr. P. Z. 8S. 1848, p. 107; Pfr. Mon. Hel. vol. ii. 
p- 497; Reeve, Conch. Icon. Vitrina, fig. 9; Hanley, Conch. Ind. 
p. 29, pl. lxv. figs. 1-4. 
Helicarion (sec. C) bensoni, Theob. Supp. Cat. p. 24. 
Helicarion bensoni, Ney. Hand-list, p. 14, with this note :—* Mol- 
luse granulated, especially the mantle, which is quite rough, being 
covered with small papille ; it entirely covers the shell; jaw smooth, 
with slight projection in centre (W. 7. B.). Botanical Gardens, 
Calcutta and Chandanagar.” 
Stoliczka has left a drawing (No. 2) with this title, and a note in 
his handwriting is as follows: —‘ Dull greenish grey,with a very slight 
pinkish tinge, or very pale olive with some dark irregular blotches; the 
larger marks on the mantle-lobes are whitish ; pedicels dusky ; sole 
of foot in three parts, middle narrowest, white, lateral parts dusky, 
speckled white.” This drawing, which is very accurate, I reproduce 
(vide Plate XXXVI. fig. 6, nat. size); it shows the large expanded 
shell-lobes covering almost the whole shell save asmall slit, and the 
animal conforms to the description of the genus in the ridge of 
the foot behind extending unbroken to the mantle-zone. 
For radula see Plate XX XVIII. fig. 2. The formula is 
BD .. Bia glee wakay eke, eee tae 
G0). le 60 
It is like the general form of Macrochlamys, the laterals after the 
fifteenth being bicuspid, the inner cusp or point considerably exceed- 
ing the outer cusp in length; the central and median are elongate, 
tricuspid in form. 
Original description:—‘“ V. testa depressiuscula, tenui, striatula, 
nitida, pellucida, pallide cornea ; spira via elevata, obtusa ; sutura 
impressa, submarginata ; anfractibus 34, conveariusculis, ultimo sub- 
