SOWEEBY : NEW SPECIES FEOM MAIIMTIUS, 43 



tunde ovalis ; peristoma simplex. Long. 13, maj, diam. 8 mm. 

 Hob. — Mauritius (Robillard). 



A regularly formed moderately elongated shell, with rounded 

 whorls. The ribs arc numerous, thin and smooth, without angles. 

 The shell bears a close resemblance to 8. Uneata, Say, but wants the 

 basal-ridge characteristic of that species. 



8. Tekebea cebnica, n.sp. PI. IV. Fig. 1. 



Testa subulata, dilute fusca, nitens ; spira elongata, versus apicem 

 acutissima, deinde levissime convexa ; anfractus 17, planato vix 

 convexi, lougitudinaliter multicostati, supra medium inter costas 

 uniseriatim puncturati, aliter Iceves ; anfractus ultimus longiusculus 

 ad basin contractus, leviter productus ; apertura elongata ; columella 

 contorta, obscure biplicata ; labrum arcuatum, loevigatum, vix incras- 

 satum ; canalis brevis, recurva. Long. 22, maj. diam. 4'5 mm. 

 Hah. — Mauritius. 



This species is allied to T. longiscata, Desh., but differs from it 

 in the absence of spiral strioe and in some other particulars. The 

 spiral groove above the middle of the whorl takes the form of 

 punctures between the ribs not cutting thi'ough them, as in T. 

 longiscata. 



9. IS'atica Eobillaedi, n.sp. PI. IV. Fig. 12. 



Testa sub-contecte umbilicata, solida, sub-ovata, pallide lutea, vel 

 albida, griseo obscure bifasciata ; spira parva, leviter prominente ; 

 anfractus 5, rapide accrescentes, convexi, rotundati, superne oblique 

 sulcati, sutura impressa ; anfr. ultimus ventricosus ; columella rectius- 

 cula, superne effusa, in regione umbilicali callo crassissirao instructa ; 

 apertura semicircularis. Operculum crassiusculum, politum, album, 

 conspicue fusco unimaculatum, carina angusta marginatum. Long. 19, 

 maj. diam. 17 mm. Hub. — Mauritius. 



The notable character of this species is the conspicuous brown 

 spot on the shining white operculum. In other respects the shell 

 is somewhat like a variety of N. marocMensis, (jmelin. I have seen 

 quite a number of specimens from Mauritius all having the spot 

 in. nearly the same position, seeming to show that it is characteristic 

 of the species. 



10. Tkochus Schliieteei, n.sp. PI. IV. Fig. 10. 



Testa conica, mediocriter alta, imperiorata, pallide carnea, flammulis 

 fuscis radiata; anfractus 7, planato declives, vix convexi, rugose 

 grano-lirati, carina tuberculata marginati ; sutura irregularis ; anfractus 

 ultimus curtus, leviter effusus, tuberculatus, biangulatus ; basis 

 planato convexa, spiraliter lirata, flammulis fuscis undulatis radiata ; 

 columella curta, crassiuscula, margaritacea, sub-torta, truncata, 

 hand dentata; apertura latiuscula, labrum acutum. Alt. 23, maj. 

 diam. 23 mm. Hah. ? 



In external appearance this species somewhat resembles certain 

 species of Polydonta, but the character of the smooth columella 

 proclaims it a true Trochus. 



11. Ptjncttjeella sinensis, n.sp. PI. IV. Fig. 14. 



Testa oblique conica, capuliformis, postice arcuata, antice truncata ; 

 costis radiantibus rotundatis minutissime imbricatis (lira angusta 



