1882. ] MOLLUSCAN FAUNA OF MADAGASCAR. 385 
deposit of callus, before the deposition of which the starting-point 
of the columella is conspicuously defined by a transverse white line, 
which starts just above the umbilicus and winds round the penul- 
timate whorl within the aperture. Operculum generally dirty lilac 
on the inside, but sometimes white or horny-brown. 
Height 50 millim.; greatest diam. 49, smallest 38; aperture 36 
long, 23 wide. 
Hab. In a marsh, north of Antananarivo (Johnson) ; Imerina 
province (Cowan). 
In form this species is not unlike A. largillierti of Philippi, but 
it is quite distinct in several respects. The spiral striation is finer, 
the umbilicus broader ; the aperture is not angular or effuse at the 
base, nor has the last whorl the rounded keel or ridge at the base 
around the umbilical fissure. 
A. cecillei, Phil., appears to be more ovate, with less tabulated 
whorls, has a higher spire, and is differently coloured. 
It is only in adult specimens that the commencement of the 
aperture near the lip is yellow. The columella is also of that colour 
in full-grown shells, but bluish white in young ones. This species 
appears to arrive at maturity after two years’ growth, as all the large 
specimens exhibit a dark longitudinal stripe or former lip just before 
the completion of the fifth whorl. In the young state this is very 
thin, and the colour is horny-brown, and not greenish olive like the 
last large whorl of the aduit. 
LIMN&A HOVARUM, Tristram. 
Limnea hovarum, Tristram, Proc. Zool. Soc. 1863, p. 61. 
Hab. Ankafana, Betsileo (Cowan). 
This species grows toa larger size than that of the specimen described 
by Tristram ; for one from the above locality is as much as ten lines 
long. In the larger shells the lines of growth become more pro- 
minent, forming arcuate and tortuous elevated ridges. The columella 
‘ also is reflexed, appressed to the whorl, yet leaves a slight chink or 
rimation in the umbilical region. All the specimens examined 
exhibit traces of transverse or spiral striz, generally interrupted and 
of a subpunctate character. 
LimN#A ELECTA, sp. nov. (Plate XXII. figs. 12, 13.) 
Shell small, ovate, transparent, corneous, narrowly rimate. Whorls 
3-31, convex, rapidly increasing. Spire small, obtuse and reddish 
at the apex. Last whorl elongate, sculptured with fine lines of growth 
crossed by a few spiral strie. Aperture vertical, ovate, acuminate 
above, occupying about two thirds of the entire length of the shell. 
Columella rather high up, reflexed over the umbilical fissure, the 
reflexed portion being striated rather coarsely lengthwise. 
Length 63 millim., diam. 4 ; aperture 43 long, 23 wide. 
Hab. About 20 miles from Antananarivo (/ohnson). 
This little species has much of the general aspect of the genus 
Succinea, and is peculiar on that account and the red tip of the 
spire. 
