BIVALVE SHELLS. 107 



sequilaterali, turgida, antice brevi, obtusa, postice oblique 

 subtruncata, margine dorsali gibba, squalide fulva, saturatiore 

 aliquantisi^er quadriradiata, transversim multilamellosa, longi- 

 tudinaliter^sulcata, sulcislaminas decussantibus ; lamellis crassis, 

 iate superne reflexis subcrenulatis, lateribus eminentioribus, 

 minus numerosis ; lunula magna, ovato-cordata, impressa, la- 

 mellosa ; valvis intus albis, pallidissime roseis ; dentibus tribus, 

 mediano bifido ; marginibus integris. 



Venus multicostata, Sow. Proc. Zool. Soc. 1835, p. 22. 

 Sow.jun. Thes. Conch. p. 705. pl. 152. f. 9, 10. 

 Hanley, Descr. Cat. p. 128 ; in Wood, Suppl. pl. 16. f. 29, 



Hab. America meridionaiis ; mare Peruvianum et Chiliense. 



22. Venus laqueata. 



V. testa ovata, ventricosa, turgida, insequilaterali, l;ransversa, 

 cordiformi, latere antico breviore, angustiore, postico obtuse 

 truncato, alba vel flavo rubescente, maculis rufis irregularibus 

 ornata aut triradiata ; lamellis transversalibus numerosis, latis, 

 crispis, antice posticeque elatioribus exasperata, ssepius denti- 

 culatis, sulcis longitudinalibus numerosis radiantibus decus- 

 sata ; umbonibus tumidis, revolutis ; lunula magna, cordata, 

 imbricato-lamellosa ; area angulose excavata ; dente medio 

 valvae sinistrse, postico valvse dextrse profunde bifidis ; margi- 

 nibus tenue crenulatis. 



Venus laqueata, Sow.jun. Thes. Conch. p. 706. pl. 153. f. 15. 



Hab. Nova HoUandia, ad Flumen Cygnorum. 



23. Venus resticulata. 



V. testa ovato-suborbiculari, crassa, tumida, cordato-subglobosa^ 

 insequilaterali, antice brevissima, obtusa, postice latiore, ro- 

 tundata, squalide fuscescente, ad umbones fusco maculata ; 

 transversim lamellis crassis, brevibus, crenulatis, obtusis cincta, 

 longitudinaliter radiatim sulcata, antice posticeque lamellis 

 minus numerosis, postice elatioribus ; umbonibus brevibus, 

 obliquis ; lunula magna, irregulariter lamellosa, in niedio cari- 

 nata; intus alba vel roseo-pudorina ; sinu pallii profundo, 

 obtuso, marginibus parallelis. 



Venus resticulata, Soiv.jun. Thes. Conch. p. 706. pl. 153. f. 23. 



Hab. Portus Essingtonensis. 



24. Venus crispata. 



V. testa ovato-transversa, turgida, inaequilaterali, antice brevi, 

 postice latiore, subtruncata, alba, rufo irregulariter maculata, 



