MOLLUSCA OF INDIA. lil 
This may be also cyclotdea, Albers (Helix cycloidea, Albers, Malak. 
Blatt. 1857, p. 89, pl. i. figs. 1, 2, 3; Pfr. Mon. Hel. vol. iv. p. 43; 
Macrochlamys, sec. A, Theob. Supp. Cat. p. 18), which I have never 
seen. 
Original description :—“ Testa subperforata, orbiculari, subdis- 
coidea, nitida, radiatim striatula, superne obsolete spiraliter  stri- 
ata, pallide cornea; spira depresso-conoidea, apice elevatiusculo, 
obtuso, sutura impressa, marginata ; anfractibus 8, angustis, con- 
veawiusculis, lente accrescentibus, ultimo ad peripheriam rotundato, 
subtus medio excavato; apertura subverticali, late lunari, peristo- 
mate albido, intus late incrassato-marginato, superne recto, margine 
basali expansiusculo, undulato, crassiusculo, columellari brevissime 
reflexo. 
*« Diam. major vix 18, minor 154, axis 7 mill. 
“ Habitat ad Damatha, prope Moulmein. Detexit Capt. J. C. 
Haughton. 
“ A single specimen is in the collection of Mr. Theobald.” 
MacrocHLaMYs JAINIANA, n. sp. (Plate XXVI. fig. 7 & Plate 
XXVIII. figs. 2-2 e.) 
= prona, MS. coll. Blanf., = perplana, MS. in pencil on a drawing 
by Stoliczka. 
Locality. Manbhum (V. Ball) ; Parisnath (W. 7. BIf.). 
Shell umbilicated, discoid, glassy, some specimens very thin; 
sculpture none, surface quite smooth ; colour dark brown, paler be- 
neath, often of a rich burnt-sienna tint; spire flat, scarcely raised 
above the body-whorl; suture shallow; whorls 6, the last well 
rounded on the periphery ; aperture subvertical, broadly and laterally 
lunate ; peristome oblique on the columellar margin. 
Size: maj. diam. 20-0, min. 16°3 ; alt. axis 6-0, body-whorl 53mm. 
is 20°3,  ,, 18-0 (Blanford coll., Parisnath). 
- 18:8, ,, 15°8(V. Ball); alt.ax. 6-5, body-wh. 5:8. 
Besides other characters the umbilicus is more open in this 
species than in M. indica, petrosa, &e. 
Animal. The foot evidently very long, and the lobe overhanging. 
There is a small right shell-lobe and a small left shell-lobe, and the 
amatorial organ is present; but in the animals examined the gene- 
rative organs were broken up and very hard. However, portions of 
the spermatophore (Plate XXVIII. figs. 2b-2¢) were preserved, 
which was of lengthened form, with a series of bicuspid processes 
along the sides, these being set closer together at the basal end 
(fig. 2d); a portion of the sac of the spermatophore with its con- 
voluted contents was also preserved (fig. 2 ¢). 
Odontophore. The jaw (fig. 2a) has the central projection ; the 
central teeth are as in MW. indica (fig. 2), but in the laterals (fig. 2. 
17-20) we find a good specific character ; they are not, as is usual in 
most species of Macrochlamys, bicuspid, but are long and straight, 
with a very minute notch near the apex, and this is not apparent 
PART IV. M 
