228 LAND AND FRESHWATER 
organs are immature in all the specimens I received from Mr. 
Theobald, but enough to show that they are like Girasia. Jaw and 
radula as in A. gigas. 
OS ate elo fe Be Ooo 
aS vac tyhs ltnesyd 3 
Grrasia ? RuBRA, G.-A. (Plate LXI. figs. 4, 4a, 46, 4c, 4d.) 
Parmarion? rubrum, Godwin-Austen, Journ. A. 8. B. 1875, p. 6, 
pl. ii. figs. 4, 4a, 46, 4¢,4d. 
Original description:— Animal of @ fine orange-pmk, grey on 
underside of the foot; tentacles short, mantle entirely covering the 
shell, with only a slight trace of a longitudinal opening running 
back from the anterior left side, three parallel bands of greenish grey 
along the back of the neck, the eye-tentacles being of the same 
colour. The gland at the extremity of the foot with a long, over- 
hanging lobe. 
inch 
“Extremity of foot to posterior end of mantle .... 0°9 
DINGO EE cs cole ele ies sn ale < Uke nen tara ee 0°8 
Anterior edge of mantle to head .............. 0-4 
Total length when moving >. '. a. cee cc oe caine 1°8 
“Shell quite rudimentary, minute, granular: major diam. 0-14 
inch, 
“ Habitat. Kohima, Naga Hills, in brushwood. 
“The mucous gland in this species differs considerably from that 
of H. gigas and its allies, the upper lobe projecting and hanging 
over so as to present, when viewed sideways, a narrow sht.” 
The exeeedingly small rudimental shell, so completely enveloped by 
the mantle, almost entitles this form to subgenerie rank ; but as only 
one specimen has been obtained, and was not fully examined as to 
its internal anatomy, I place it for the present at the end of the 
series of Gurasia. 
Subgenus AusrEenia (continwed : vide p. 148, Part IV.). 
All with smooth or polished shells. 
AvsTENIA 6164s, Benson. (Plate LY. figs. 3, 3a, 36, animal 
from spirit-specimen ; Plate LX. figs. 1 and 1a, from living animal ; 
Plate LXII. fig. 8, radula.) Type of the genus. 
Vitrina gigas, Benson, J. A. 8. B. 1836, p. 350. 
Austenia gigas, Godw.-Aust. P. Z.8. 1880, pp. 294-298, pls. xxiv., 
KXye, XXvi, 
Helicarion gigas, Godw.-Aust. J. A. 8. B. 1875, pl. iii.; Pfr. Mon. 
Hel. vol. ui. p. 496. 
Vitrina gigas, Reeve, Conch. Icon. fig. 18; Hanley, Conch. Ind. 
p. 29, pl. lxvi. figs. 2 & 3. 
