270 F. Stoliezka — On the Cyclostomacea of Fencing. [No. 3, 



The species which, are at present known to belong to the genus 

 are : L. tomotrema, Bens., (Sikkim, Assam and Cachar), leporinus, Blf., 

 (Banna), trochoides and striolatus from Penang, Wullersdorfi, Pfr. and 

 Zel., and another as yet undescribed species also from the Nicobars ; 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. (= quadriflosus, Bens.,) while 

 PfeifFer in his second Supplement to the Pneumonopoma (p. 29) refers the 

 latter species to Cyclotus. 



Lagocheiltjs tkochoides, n. sp. PI. X, Pig. 15. 



L. testa turrito conica, sub-anguste umbilicata ; anfractibus sex, sutura 

 profunda simplici junctis, primis duobus conevxis, ceteris supra medium an* 

 gulatis, ultimo bi-angulato ; omnibus cuticula opaco-fusca indutis, transver- 

 'sim striolatis, spiraliter striatis, striisfiliformibus : duabus in anfr actio penul- 

 timo supra angulum subdistantibus, infra unguium 4-5 approximatis ; in an- 

 fractu ultimo angiitis duobus ad intervalla breviter ciliatis ; basi in adultis 

 prope peripheriam et ad umbilicum, in junioribus omnino, confertim striata ; 

 testa sub cuticulam albida, ad apicem rubescente ; apertura rotundata, modice 

 obliqua, in angulo superiore velpostico distincte incisa, bilabiata : labio internet 

 breviore,violaceo tincto, exter no fere plane expansiusculo, in facie concentrice 

 striolato, ad marginem exteriorem atrato. Operculum multispiratum, tenue, 

 corneum. Diam. maj. 10, diam. mm. 8, alt. testes 9 6, diam. apert. int. 4r2, 

 externos 5 m.m. 



This is the largest species as yet known of the genus, the more regu- 

 larly conical form, angular whorls, numerous spiral striae, 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 Sghadrensis ; they are comparatively more largely umbilicated than 

 adult ones, and their cuticle is more or less distinctly olive, while in jthe 

 latter it is dark brown in fresh specimens, often becoming reddish brown in 

 dried ones. 



Hub. 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 

 gland\ilar slit proceeds along the middle to the end of the foot. 



