270 F. Stoliczka — On the Cyclostomacea of Penang. [No. 3, 
The species which are at present known to belong to the genus 
are : L. tamotrcma, Bens., (Sikkim, Assam and Cachar), leporinus, Blf., 
(Barma), trochoides and striolatus from Penang, Wiillersdor/i, Pfr. and 
Zel., and another as yet undescribed species also from the Nicohars ; scis- 
simargo, Bens., from Tenaserim. These localities indicate the geographical 
extent of the genus. Reeve in his Monograph of Cyclophorus, when 
speaking of L. scissimargo, says that there is more or less an indication of 
a notch in the aperture of C. triliratus, Pfr. (= quadrifilosus, Bens.,) while 
Pfeiffer in his second Supplement to the Pneumonopoma (p. 29) refers the 
latter species to Cyclotus. 
Lagocheiltjs teochoides, n. sp. PI. N, Fig. 15. 
L. testa turrito conica, sub-anguste umbilieata ; anfractibus sex, sutura 
profunda smplici junct is, primis duobv.s conevxis, ceteris supra medium an- 
gulatis, ultimo bi-angulato ; omnibus cuticula opaco-fusca indutis, transver- 
sim striolatis, spiraliter striatis, striisfilformibus : duabus in anfractu penul- 
timo supra angulmn subdist antibus, infra angulum 4-5 approximatis ; in an- 
fractu ultimo angulis duobus ad intervalla breviter ciliatis ; basi in adultis 
prope peripheriam et ad umbilieum, in junioribus omnino, confcrtim striata ; 
testa sub cuticulam albida, ad apieetn rubescente ; apertura rotundata* modice 
obliqua, in angulo superiore velpostico distinele ineisa, bilabiata : labio interno 
breviore, violaceo tinclo, externo fere plane expansiusculo, in facie concentrice 
striolato, ad marginem exteriorem atrato. Operculum multispiratum, tenue, 
corneum. Bum. maj. 10, diam. min. 8, alt. testae 9 '6, diam. apert. int. 4-2, 
externce 5 m.m. 
This is the largest species as yet known of the genus, the more regu- 
larly conical form, angular whorls, numerous spiral strise, absence of brown 
spots on the shell, etc., readily separate it from L. scissimargo. The fine 
transverse striolation of the cuticle is very easily worn off, but the spiral 
striation is always very distinct, and well marked even after the removal of 
the cuticle. Young shells have a striking resemblance to those of Cremno- 
conchus Syhadrensis ; they are comparatively more largely umbilicated than 
adult ones, and their cuticle is more or less distinctly olive, while in the 
latter it is dark brown in fresh specimens, often becoming reddish brown in 
dried ones. 
Sab. Penang. I found the species on large stones between decaying 
vegetable matter at an elevation of from 200 to about 1000 feet ; it is scarce. 
The animal is pale grey, the body itself being slightly darker than the 
foot ; the rostrum is long, deeply cleft in front, reddish at the base ; tentacles 
long, and thin, dark grey, blackish towards the tips ; eyes on their outer base 
on indistinct bulgings ; a dark pedal row, moderately swollen, extends from the 
lower base of the rostrum to behind the operculum, from which a deep, narrow 
glandular slit proceeds along the middle to the end of the foot. 
