"ae 
from Burmah and the Andamans. 19] 
ad peripheriam rotundato, subtus medio excavato ; apertura sub- 
verticali, late lunari, peristomate albido, intus late incrassato- 
marginato, superne recto, margine basali expansiusculo, undulato, 
crassiusculo, columellari brevissime reflexo. 
Diam. major vix 18, minor 153, axis 7 mill. 
Habitat ad Damatha, prope Moulmein. Detexit Capt. J. C. Haugh- 
ton. 
A single specimen is in the collection of Mr. Theobald. 
3. Helix Helferi, B. 
Testa profunde et anguste perspective umbilicata, orbiculata, sub- 
depressa, oblique striatula, foveolis conspersa, sub epidermide 
rufescente, sparsim hispida, albida, fascia rufa angusta superne 
ornata ; spira depresse conoidea, apice valde obtuso, suturaimpressa, 
submarginata; anfractibus 43 convexiusculis, angustis, lente ac- 
crescentibus, ultimo antice descendente, supra peripheriam obso- 
lete angulato, circa umbilicum subito excavatum compressiusculo ; 
apertura obliqua, transverse ovato-lunata, peristomate undique ex- 
panso, marginibus approximatis, callo tenui junctis. 
Diam. major 12, minor 10, axis 6 mill. 
Habitat in Insulis Andamanicis sintis Bengalensis. 
This little shell, named after Dr. Helfer, who lost his life in 
an attack made by the savage inhabitants while he was attempt- 
ing to investigate the natural history of the Andamans, is nearly 
related to H. asperella, Pfr., and H. fallaciosa, Fér. It is, how- 
ever, deficient in the peculiar granulate sculpture of those spe- 
cies, has a more closely-wound spire, a broader aperture, and 
the umbilicus is suddenly and deeply excavated, instead of being 
encroached on by the protuberance of the penultimate whorl 
occasioned by the partial deviation of the anterior portion of 
the last whorl. The granulate sculpture observable in the 
two shells cited above is replaced in H. Helfert by scattered 
shallow indentations, the seat of the hairs, which are to be 
detected on the portion of the caducous epidermis remaining in 
the single specimen received for examination. 
4. Helix Pilidion, B. 
Testa anguste umbilicata, subgloboso-conoidea, tenuissima, leevigata, 
leviter striatula, striis remotiusculis elevatioribus corneo-fuscis, 
alteris confertissimis spiralibus decussantibus, translucente, albida, 
fascia unica peripherica rufa ornata; spira conoidea, apice obtu- 
siusculo, sutura leviter impressa ; anfractibus 45, sensim accrescen- 
tibus, convexiusculis, ultimo antice vix descendente, subtus con- 
vexo ; apertura obliqua, quadrato-lunata, peristomate acuto, tenui, 
undique expansiusculo, marginibus remotis, subconniventibus, 
callo tenui junctis, columellari latiore triangulato-expanso. 
Diam. major 16, minor 13, axis 9 mill. 
Habitat in regione Peguensi. 
