382 MR. E. A. SMITH ON THE [Apr. 18, 
did not illustrate the full size attained by adult shells. The largest 
and apparently full-grown example recently brought to England by 
Mr. Cowan has a greatest diameter of 45 millim., is 34 across at 
the smallest diameter, and 20 high, resting upon its base. The 
peristome is not thickened or expanded on the upper margin, but is 
simple and arcuate. 
Heurx (Ampewira) sHAvi, Smith. (Plate XXII. figs. 1-3.) 
Helix (Ampelita) shavi, Smith, Journ. of Conch. 1879, vol. ii. 
p. 339. 
Hab. Tanala province (Cowan). 
In this instance also, as with H. covani, the dimensions given in 
the above work are not those attained at times by this species. The 
largest before me is 35 millim. across the greatest width, and 28 at 
the smallest. All retain the character of the last whorl descending in 
front, and have the labrum more or less (sometimes entirely) violet- 
brown. 
Hevix (AMPELITA) PERCYANA, Smith. 
Helix (Ampelita) percyana, Smith, Proc. Zool. Soc. 1880, p. 485, 
pl. 48. f. 12, 12a. 
Hab. Ankafana, Betsileo (Cowan). 
Of this species, originally described from a unique specimen in 
Dr. Percy’s collection, I have now seen four more, very similar to 
the type, and differing from one another only in the disposition and 
quantity of the remarkable opaque creamy-yellow zigzag markings. 
Sometimes the expanded outer lip is of a livid purple colour. 
Buuimus (RHACHIS) NIGRILINEATUS, Reeve. (Plate XXII. 
fig. 4.) 
Hab. Betsileo (Cowan) ; ——? (Reeve). 
The type of this species, described by Reeve (Conch. Icon. pl. 
77. fig. 567), is of immature growth. The name is not a charac- 
teristic one; for the lines are not black, but of a bronzy brown 
colour. Their disposition and number appear tolerably constant. 
There are two around the middle of the last whorl, of which the 
upper is a trifle the broader ; a third is situated above these, inter- 
mediate between them and the suture; a fourth encircles the base; 
and at times two or three finer ones are met with in the same part; 
and in the immediate region of the columella the shell is horny 
and pellucid, contrasting conspicuously with the rest of the opaque 
yellow surface. The whorls are seven in number, rather convex, 
sculptured with lines of growth and microscopical spiral strie. The 
apex is brownish horn-colour and not very acute. The columella 
is perpendicular and rather straight, narrowly reflexed above, thus 
forming a slight rimation. 
STENoGyRA (CLAVATOR) JOHNSONI, sp.nov. (Plate XXII. fig. 5.) 
Shell moderately thick, imperforate, elongate, subcylindrical, 
slightly shining ; rich brown, with darker streaks here and there, 
