161 



teeth, the peculiar characteristic of that weIl-known shell. There is 

 a slight shade of orange beįieath the umbones internally, and the 

 teeth are similar to thosc oi puerpera. 



Venus laceuata. Ven. testd V. įjuerperre affini, mmus autem ven- 

 tricosd et margine ventrali posticoque magis arcuatis ; margine 

 ligamentali subrecto et minitne declivi ; lamellis concentricis con- 

 fertioribus, et postivi asperrimis ; superficie extcrnd albidd, lineis 

 ferrugineis aut brunneis angulatim strigatd ; extremitatc posticd 

 Intus extusque immaculatd. 

 Index Tęst. Sup. t. 10*. f. 23. Long. 250 ; lat. 2-50 poli. 

 Hab. Moluccas.' Mus. Hanley. 



The fringed lamellac bccome so crowded at the hinder extremity 

 of this rare uiid beautiful .shell as to form a kind of raised reticulatioii. 

 It is a rauch rounder species than the V. Listeri, to vvhich it also 

 bears a considerable resemblancc. 



Venus scahra. Ven. testd ovato-cordatd, ina:quiluteraU, subven- 

 tricosd, pallide brunned, radiatlm costellatd ; costellis confertis et 

 concentricl' sųmmiferis ; margine ventrali valdi urcualo ; dorsali 

 utrinqite convexiusculo et antich brevi ; natibus acutis et anlici 

 incumbentibus ; lunuhl subinconspicud ; pube haud excavatd ; super- 

 ficie internd, lividd et postice saturatius tinctd ; margine interno 

 crenato. 

 Index Tęst. Sup. t. 16. f. 24. Long. 050 ; lat. O- 70 poli. 

 Hab. Catbalonga, Philippines. Mus. Cuming, Haiiley. 

 A rare si)ecies, which is somevvhat allied to decorata and ovata, 

 but distinguibhable froin eithcr by the greater convexity of its lovvcr 

 margiu. The radiating ribs are peculiarly strong upon tlie umboues, 

 from whence they separate into two or three smaller oncs, vvhich 

 become more deusely armed with the concentiic rovvs of scales as 

 they ajjproach the lowcr margin. 



Vknijs RonoRATA. Ven. testd cordato-frigond, solidd, valide in- 

 (rquilaterali, magis minusve ventricosd, albidd (intus purpureo 

 postice itifectd), concentrice cingulatd ; cingulis multis, levibus, 

 obtusis ; interstitiis Icevibus ; margine ventrali arcuato (fintus leviter 

 crenulato) ; dorsali postico convexo et valdi declivi ; lunuld pro- 

 fundd, cordatd ; pube Itevi, excavatd ; sulco radiante obtusissimo, 

 lunulam alteram, ad extremitatem anticam simulante. 

 ludex lest. Sup. t. 16. f. 25. Long. 1 ; lat. 1 poli. 

 Hab. Van Diemen's Land. Mus. Hanley, Metealfe. 

 Not at all unlike the dysera of Chemnitz, but the concentric ribs 

 are in that species distant and membranaceous, whilst in ours they 

 are thick, obtusc, and rather cro\vded. 



Venus Lyra. Ven. testd rotundato-cordatd, ventricosd, valde iu' 

 (equilalerali, albidd, lineis maculisque brunneis angulatim variegatd, 

 concentrice costellatd ; costellis confertissimis Icevibus, medio sub- 

 imbricatis, antice et postice membranaceis ; interstitiis glabris ; mar- 

 gine ventrali arcuato, intusque crenato ; lunuld cordatd, brunned, 

 pro/undh impressd ; pube excaoatd ; superficie internd albidd. 



