Zoological Society. 433 



Venus Chemnitzii. Ven. testd rhombco-cordutd, crassd, vcntri- 

 cosd, vuldv iiucquUatcrali, alOidd, brvnnco subradiatim maculatd et 

 strigatd, radiatim costellatd, concentric}' lamelliferd ; lamclUs nu- 

 mcrosis, brevissimis, undique crispis ; coste/lis anc/ustis confertis- 

 simis ; margine ventruli convexo intusque crenulato ; dorsali pos- 

 tico subrecto et minimv declivi ; latere postico supernr angulato ; 

 untico brevi, attcnuato, rotundato ; lunula fused, cordatd ; liga- 

 inento angusto, infosso ; superficie interna albidd, immacidatd. 

 Index Test. Sup. t. 16. f. 20. Long. 1-75 ; lat. 2-50 poll. 

 Hab. Sun. Nicholas, Philippines (Cuming). Mus. Cuming, Hanley. 

 'lliis beautiful species bears a strong resemblance to the shell de- 

 lineated in the sixth volume of the ' Conchylien Cabinet,' fig. 384, 

 which is commonly quoted for the reticulata of Linnaeus equally with 

 the two preceding figures ; although Chemnitz, without separating it 

 from that species, specifies the absence of the orange tinge upon the 

 teeth, the peculiar characteristic of that well-known shell. 'Iliere is 

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

 teeth are similar to those oi puerpera. 



Venus lacerata. Ven. testa V. puerperie affini, minus autcm ven- 

 tricosd et margine ventruli posticoque magis arcuatis ; margine 

 ligamentali subrecto et minimi' declivi; lamellis concentricis con- 

 fertioribus, et postice asperrimis ; superficie externa albidd, lineis 

 ferrugineis aut brunneis angulatim strigatd ; extrcm,itate posticd 

 intus extusque immaculutd. 

 Index Test. Sup. t. 16. f. 23. Long. 250 ; lat. 2-50 poll. 

 Hab. Moluccas ? Mus. Hanley. 



The fringed lamellae become so crowded at the hinder extremity 

 of this rare and beautiful shell as to form a kind of raised reticulation. 

 It is a much rounder species than the V. Listeri, to which it also 

 bears a considerable resemblance. 



Venus scabra. Ven. testa ovato-cordatd, incequilaterali, suhven- 

 tricosd, pallide brunned, radiatim costellatd ; costellis confertis et 

 concentrice squamiferis ; margine ventruli vuldc arcuaio ; dorsali 

 utrinque convexiusculo et antice brevi; natibu^ ucutis et antice 

 incumbentibus ; lunuld subinconsjncud ; pube haud excavatd ; super- 

 ficie internd, lividd et postice saturatius tinctd; margine interna 

 crcnato. 

 Index Test. Sup. t. 16. f. 24. Long. 050 ; lat. 0*70 pofl.'i: 

 Hab. Catbalonga, Philippines. Mus. Cuming, Hanley. 

 A rare species, which is somewhat allied to decorata and ovnta, 

 but distinguishable from either by the greater convexity of its lower 

 margin. The radiating ribs are peculiarly strong upon the umbones, 

 from whence they separate into two or three smaller ones, which 

 become more densely armed with the concentric rows of scales as 

 they approach the lower margin. 



Venus robouata. Ven. testd cordato-trigond, solidd, valide in- 

 (squilaterali, magis minusve ventricosd, albidd (intus purpurea 

 postice infectd), concentrice cingulatd ; cingulis multis, Isvibus, 

 obtusis ; interstitiis la:vibus ; margine ventruli arcuato (intus leviter 



