15 
la suture lignes d’accroissement plus foncees et lavees de bistre sur la zone sutu- 
rale; une bande brune presque effacee et large de deux millimetres, court au-dessous 
de la ligne mediane du dernier tour, sur la base duquel, de meme que pres de la 
suture, il ya seulement des vestiges d’autres bandes plus etroites. Ouvertüre ovale, 
passent au blanc, ä l’angle supdrieur, et dans une large zone basale, ce qui parait 
indiquer que le bord droit devait etre blanc. Bord columellaire tres faiblcment arque, 
assez reflechi sur la fente ombilicale, d’un blanc presque nacre, supdrieurement 
epaissi par une callositd oblongue, faiblement relie ä un autre epaisissement blanchätre? 
ddposd au fond de l’angle superieur de l’ouverture, ce qui, dans les exemplaires 
parfaitement adultes, doit constituer une callosite unique considerable. “ 
Rio Luapula, von Capello und Jvens nur in einem etwas beschädigten Stück 
mitgebracht, aber neuerdings von Harger am Originalfundort wieder aufgefunden. Smith 
bemerkt ober diese Stücke: „This is the largest known species of the genus Lani- 
stes, and is chiefly distinguished from other species by its great size. The two 
Shells obtained by Mr. Harger differ somewhat in form and sculpture from the type, 
having a shorter spire and a broader body whorl, and besides the strong lines of 
growtli the sur face in places is more or less distinct malleated. The periostracum 
of one specimen is of the ordinary olivaceous tint common to many species, but in 
the other example which is older it is quite black, although not a dead shell. The 
operculum is very thin, yellowish horny beneath, and coated above with a thin dirty 
whitish incrustation. For so large a shell it is decidedly small, und does not close 
up the aperture until it has been drawn within fully two inches from the peristome. “ 
10. Meladomus jouberti Bourguignat. 
Taf. 25. Fig. 1-3. 
Testa anguste perforata, magna, ventrosa, sinistrorsa, valde contorta, solida. crassa, 
opaca, ponderosa, parum nitente, atro-castanea, saepe ad summura erosa, grosse striata, in 
ultimo obsolete costulata. Spira breviter obtuse subconoidea (apex obtusus, depressus, quasi 
obtritus); — anfractibus 5 convexis, regulariter ac nihilominus velociter crescentibus, sutura 
inter superiores fere lineari, inter Ultimos profunda separatis, ultimo maximo, inüato-rotundato. 
Apertura parum obliqua, sat lunata, subovata, superne angulata, intus rubescens; columella 
sübrectiuscula ; — peristomate recto, nihilo minus incrassato, ad marginem columellarem 
robusto, crasso ac reflexo; marginibus callo albo validoque junctis. 
Alt. et diam. aeque 60, alt. apert. 40, lat. apert. 30 mm. 
