990 
Cette espece, dit-il, est peut-etre une coquille ä l’etat de jeune äge. II est donc 
sage de rejeter cette forme, qui, en somme, ne ressemble nullement au Cyclostoma 
clathratulum de Sowerby et de L. Pfeiffer. 
Gr. Austen unterscheidet eine var. minor, doch ohne sie ahzubilden; er sagt 
über sie: Shell closely umbilicated, very globosely turbinate, solid, polished, sculp- 
ture regulär spiral ribbing, crossed by fine transverse irregulär costulation; colour 
white, one specimen dark grey on the apex; spire conoid, apex blunt, and smooth 
for l 1 / 2 wliorl; whorls 4 x / 4 . Aperture ovate; peristome simple, strong and attached 
close to the penultimate whorl. — Operculum situated close to the peristome, very 
thick and shelly, the subcentral nucleus slightly sunken below the Router whorl; 
dark grey in central portion. Major diameter 18, minor 15,3, alt. axis 10,0 mm. 
Smith bemerkt dazu mit Hecht : The var. minor of Gfodwin Austen differs only from 
the typical form in the absence of the spiral colour lines, the form and spire being 
almost identical. The size quoted by the author is altogether misleading, as the 
largest of the specimens placed by him as this variety is 25 mm., the normal size 
of the species. All the examples have the dark purplish zone upon the upper part 
of the spire. 
3, Otoporaa balfouri Godwin-Austen. 
Taf. 145. Fig. 4—7. 
Testa globoso-turbinata, aperte et pervie umbilicata, solida, albida, vestigia epidermidis 
fuscescentis conservans, in anfractibus superis distincte sed subtiliter clathrata, in inferis 
liris spiralibus distinctis regularibus undique nisi in umbilico et striis versus aperturam di- 
stantibus costiformibus sculpta. Spira pyramidalis, apice laevi, (plerumque decollato); su- 
tura impressa. Anfractus 5 convexi celeriter accrescentes, ultimus antice longe et sat pro- 
funde descendens. Apertura parum obliqua, fere piriformis, supra acuta, infra dilatata, in- 
tus fuscescenti-alba, late fuscescenti limbata; peristoma callo brevi exciso subcontinuum, so- 
lidum, fuscescens, parum reflexum, margo columellaris basi arcuatus, dein stricte ascendens, 
angulum prominentem cum callo parietali formans. — Operculum — ? 
Diam. maj. spec. depicti 39, min. 34, alt. 35 mm. 
Otopoma balfouri Godwin-Austen, in: Pr. Zool. Soc. London 1881 p. 253 
pl. 27 üg. 2, 2a. — Crosse, in: Journal de Conchyliologie 1884 
*) Shell globosely turbinate, solid, very openly umbilicated, ribbed regularly and spirally throughout; 
but the ribbing does not extend within the umbilicus; colour white; spire pyramidal, decollate usually for 
