of chestnut spots of an irregular shape, but having a tendency to be triangular below the suture 

 and on part of the penultimate whorl; these spots enclose irregular whitish spots. Aperture 

 oval, with rounded basal and outer margin, columellar margin nearly straight; upper angle of 

 aperture blunt, with a thick layer of enamel on the body whorl, forming a rim near the angle 

 of aperture and connected with the funicular tongue-shaped pad, which fills a large part of the 

 umbilicus, this latter seems to be pervious, and is formed below of a deep, large groove round 

 the funiculum, the whole columellar part is light chestnut (perhaps bleached). 



Operculum wanting, probably calcareous. 



Alt. 6, lat. 6-/.; apert. alt. 4 1 /,, lat. 3 Mill. 



This shell is remarkable for its brown columella and the blotches near the suture. It 

 may be allied to N. pseustes Watson (Challenger Gastrop. p. 44, PI. 27, fig. 3) but besides the 

 collar, I see no brown markings, as in that species and the umbilicus seems to be different, for 

 Watson describes it as disappearing behind the pillar callus, and I can introducé a fine needie 

 at a relatively considerable depth. 



22. Natica simplex n. sp. PI. XIV, fig. 1. 



Stat. 310. 8°30'S., II9°7'.5 E. Flores Sea. 73 M. Sand with few pieces of dead coral. 1 Spec. 



Shell conically globose, rather thin, smooth and shining. Whorls z, 1 /» moderately convex, 

 forming a rained spire. Sculpture consisting of very fine growth-striae, stronger towards the upper 

 suture of each whorl, crossed by microscopic, wavy, spiral striae. Colour of shell light yellowish- 

 redbrown, with a narrow white zone below the suture, and a large one occupying the base. 

 Suture of last whorl gradually descending towards the aperture, upper margin of last whorl 

 appressed on the bodywhorl. Aperture ovate, with a blunt angle above, right margin regularly 

 curved, more rounded below and passing imperceptibly into the basal margin ; columellar margin 

 nearly straight, with a porcellaneous pad above on the bodywhorl, slightly reflected over the 

 umbilicus, which is rather large, pervious, with scarcely any tracé of a funiculum, consequently 

 the columellar margin is only inconspicuously thickened, on the place where the funiculum should 

 terminate. Interior of aperture brownish. 



Operculum wanting, probably calcareous, for the columella has a slight ridge. 



Alt. 14 1 /,, lat. 14; apert. alt. io 1 /,, lat. 7. 



This species is of a very simple character, in its umbilicus it resembles N. semisukata 

 Gray, by the wanting funiculum. 



23. Natica (Neverita) sp. 



Stat. 204. Bet ween islands of Wowoni and Buton. 75 — 94 M. Sand with dead :;helLs. 1 Spec. 



A probably young, bleached shell belongs to the subgenus Neverita, I cannot identite- 

 it with any described species, but it is not in sufficiënt good condition, to describe it as new. 



24. Natica (Lunatia) simulans Smith. 



SMITH. Ann. and Mag. of Nat. Hist. Ser. 7, Vol. XVIII, 1906, p. 173. 



I0 5 



SIBOGA-EXPEDITIE XI.IX 1 ^. 2S 



