MOLLUSCA OF INDIA. 193 
suddenly expanded, in a somewhat bell-shaped form, smooth, flatly 
convex in front, with a few very shallow indistinct wrinkles or pits ; 
aperture very oblique, quadrate ; peristome double, rounded on the 
outer lower margin, the columellar margin with a distinct notch ; 
operculum smooth in front. 
Size: major diam. 3-7, alt. axis 2-9 mm. 
Ota) ee) OM inch. 
This shell is allied to A. notatus and damsangensis, but the ex- 
panded part of the last whorl behind the aperture is smoother, with 
only an indication of wrinkling. It is more closely wound than the 
latter, and the aperture differs from both in its squarer form and 
angulation below (compare with the figures on Plate XLIII.). 
Specimens from the Lhota-Naga Hills (fig. 2, Plate XLVIII.) differ 
slightly in being larger and in the expanded portion being more pitted 
and with little or no costulation towards the apex; these differences 
were found constant in 25 specimens, received by me from the late 
Mr. A. Chennell, after whom I have named this species. Deeply do 
I deplore, and I am sure all who knew him do the same, the early 
death of this excellent surveyor, who was one of the assistants in my 
Survey Party on the Assam Frontier. He was always to be depended 
on, and was possessed of great ability for the work, and tact and know- 
ledge of the people. Combined with these official qualifications, he 
was a great lover of natural history, and a most ardent and admir- 
able collector of birds, insects, and shells. My own collection and 
that of the late Marquis of Tweeddale were both greatly enriched by 
his indefatigable work. A fall in the rocky bed of a ravine, which 
occurred more than 2} years previously, injured him internally and 
ultimately affected the spine, and he died after great suffering in 
Bombay Harbour last October, on his return from a trip to Australia, 
where he had been for the benefit of his health. 
Atyc#£us incramt, W. T. Bf. (Plate XLIV. figs. 1,1 a@,16,1¢.) 
Alyceus ingrami, W. T. Bf. J. A. S. B. 1862, p. 185; Pfr. Mon. 
Pneum. vol. 11. p. 48 ; Hanley, Conch. Ind. p. 38, pl. xcii. figs. 7, 10; 
Reeve, Conch, Icon. vol. xx. pl. vi. fig. 54 ; Theob. Supp. Cat. p. 39; 
Theob, J. A. 8. B. 1871, p. 92 (is ingrami, var., a distinct and good 
species) ; Nevill, Hand-list, p. 292. 
Locality. Tongoop, Arakan. 
Original description :—“ Testa late umbilicata, conoideo-depressa, 
acute sinuato-costulata, albida, interdum rubello-albida, versus apicem 
ferruginea, vie translucens. Spira conoidea, apice obtusula, sutura 
parum profunda. Anfr. 4 convexi, ultimus ad peripheriam sub com- 
pressus, ad latus mediocriter tumidus, ibidem confertissime costulatus, 
tum constrictus, prope aperturam non descendens. Spatium constric- 
tum longitudinis mediccris, costulatum, medio tumidum ; tubulum 
suturale medroere, 4 peripherie subequans. Apertura obliqua, circu- 
laris ; peristoma duplex ; externo breviter incrassato-expanso ; interno 
expaniusculo, continuo. Operculum fusco-corneum, multispirum, ear- 
terne perconcavum, nucleo centrali intus prominente papillart. 
