320 Contributions to Indian Malacology. [No. 4, 
epidermis ; colour white, with broad zigzag chesnut stripes crossing 
the whorls, and a wide submedian band of the same colour surround- 
ing the shell. Spire scarcely raised, suture deep. Whorls 43, round- 
ed; the last cylindrical, descending slightly and gradually towards 
the mouth, and bearing, 3 mm. behind the aperture, a short reverted 
sutural tube curved into an arch, so that its posterior termination is 
close to the suture, and open at both ends. Aperture slightly oblique, 
circular. Peristome, (in well grown specimens,) double, the inner lip 
continuous and slightly protruded, angulately incised at the suture. 
Outer lip expanded and produced, close to the last whorl, into a 
small vertical tongue-shaped projection. Operculum multispiral, 
almost flat, with a central prominent nucleus within, slightly con- 
cave externally, the edges of the outer whorls being free and slightly 
raised. 
mm. inch 
Majors diameter yie-\ssdee-jecs-2-)-<4 te otn Ud 0.68 
IM SonGre. GUO Ry ear ivene neu aranecese tno.) ALA! 0.56 
Allevidesy wu Peyenra ee a cee ay Ca eS 0.34 
Diameter of aperture, ......... 53 0.25 
Hab. Shan Hills, east of the ne af en 
Of this most interesting shell, I only obtained two specimens, one 
alive and in good condition, but barely full grown, the other old, 
worn and dead: one was picked up at the base, the other on the top 
of the range of hills lying to the east of the beautiful valley, in which 
are situated the present and former capitals of the kings of Burma. 
The genus Spiraculum was proposed in 1883, (J. A. S. Vol. II. 
p- 391) by Dr. Pearson, then Curator of the Asiatic Society of Ben- 
gal, for the reception of the anomalous Sp. hispidum, and also of 
Pterocyclos parvus from the Khasi hills. Mr. Benson had, a very 
short time previously, in 1832, published the description of the allied 
genus Pterocyclos,(J. A. S. Vol. I. p. 11) and Dr. Pearson proposed 
to substitute the name Spzraculum, under the idea that the type of 
Mr. Benson’s genus was an imperfectly developed shell. Dr. Pear- 
son was entirely in error, as was shewn soon after by Mr. Benson, 
(J. A. S. Vol. V. p. 355) whose generic name has been universally 
adopted, while Dr. Pearson’s appellation has been treated a synonym 
by many authors, by Dr. Pfeiffer amongst others, while the brothers 
Adams and a few other conchologists have preserved the name Spira- 
