2 | j 



1 rim, by a large groove, with two intermediate rims, which are also crenuiate; at the 

 proximal side of the broad rim runs a groove with a smal] rim therein. 



i u. .\ ■ Lamarck. 



I Ai v ert. Ed. 1 >esh. Vol. VIII, p. 637. 



PHILIPPI. Martini-Chemn. ( onch. Cab. Ed. II, Vol. II, Natica, p. 21, PI. 3, fig. 1. 2, PI. 8, 



Rl mch. te. Vol. IX. Natica, fig. 46 



Tryon. Man. of Conch. Vol. VIII, p. 32, PI. 9, fig. 64. 



St.it. [33. Lirung, Salibabu-island. l'p to 36 M. Mud and hard sand. 2 Spcc. 

 Stat. 261. Klat. West coast of Great-Kei-island. 27 M. Mud. 2 Spcc. 



'Die specimens are young. 



Natica crassa n. sp. PI. XIII, fig. 3. 

 Stat. 58. Sol ia, Savu. lp to 27 M. Sand. 1 Spec. 



Shell sniall. subglobose, with blunt spire, thick, shining, with rather strong growth-striae, 

 strongest below the suture, and microscopic waved spirals. Whorls 4 1 /,, slightly convex, especially 

 the upper ones, which are separated by a conspicuous suture, which is shallower in the last 

 whorl : this suture strongly descends towards the aperture, and on this part the growth-striae 

 are very strong and crowded; just behind the aperture the shell is slightly contracted. Colour 

 white, with a large, irregular, yellowish-brown zone near the median part of last whorl, this 

 encloses irregular white spots. Aperture small, oval, with a blunt angle above; right 

 margin thick, curved, rounded below ; columellar margin nearly straight with a callous pad at 

 the upper part and a thick. subtriangular, porcellaneous deposit, forming in part the end of the 

 funiculum and covering the upper part of the umbilicus, which is narrow interiorly, hut apparently 

 pervious: a deeply incised rather broad groove, separates the funiculum from the bodywhorl, 

 o the columella joined to the thick, rounded basal margin of aperture by an angle which 

 produces a short tongue-shaped layer, just below the umbilical groove. Interior of aperture, 

 smooth, white. 



Operculum wanting, luit the columella has a slight groove, indicating the presence of a 

 calcareous operculum. 



Alt. 7 1 /,, lat. 8 1 /,; apert. alt. 5'/,, lat. 3 Mill. 



This species may be recognized by its thick shell, by the strongly descendin^ suture, 

 the strong striae near the aperture, which is unusually small. I know no nearly allied specie-,. 



21. Natica supraornata n. sp. PI. XIII, fig. 4. 



Stat. 274. 3°28'.2S., 1 34 53'. o E. Near Aru-islands. 57 M. Sand and shells, stones. 2 Spcc 



Shell small, depressedly subglobose, with blunt spire; rather thick, smooth, whorls 3 

 one convex, the remaining nearly flat; sculpture consisting of very fine growth-striae, 



: • ar the suture and towards the aperture. Colour yellowish-white, with a collar 



104 



