BIVALVE SHELLS. 85 



ad umbones compressa, transversim tenuistriata, striis in 

 latere postico evanescentibus ; albo-grisea fusco in medio 

 maculata, ad margines saepius lineolata; maculis in medio 

 saepius duabus personatis ; lunula areaque minimis, angustis, 

 lanceolatis, atro-castaneis ; valvis intus in fornice violaceis, in 

 margine albis ; irapressione musculari antica ovato-oblonga ; 

 fossula laterali valvae dextree usque ad dentem cardinalem 

 prolongata ; impressione pallii ad marginem descendente. 



Circe personata, Desh. Proc. Zool. Soc. 1853. 



Hab. Oceanus Indicus ; Insulee Philippinenses. 



6. ClRCE LENTICULARIS. 



C. testa ovato-subtrigona, in medio turgida, ad peripheriam acuta, 

 insequilaterah, antice posticeque obtusa, transversim sulcato- 

 pUcata, alba, lineoHs castaneis angulatis vel undulatis inter- 

 ruptis ornata; sulcis in latere postico evanidis; umbonibus 

 depressis, phcis obsoletis divaricatis notatis; lunula angusta, 

 atro-fusca, lanceolata; vulva profunde excavata, atrata, Hneis 

 atris ii-radiantibus ornata ; valvis intus paUide croceis ; impres- 

 sione paUii brevissima, in medio valvarum posita. 



Circe lenticularis, Desh. Proc. Zool. Soc. 1853. 

 Hab. ? CoU. Cuming. 



7. ClRCE CORRUGATA. B.M. 



C. testa subcomplanata, postice subangulata, polita, prope um- 

 bones rugulosa, grisescente fulva, minute lineis rubris omnino 

 scripta, postice subquadrata; marginibus dorsalibus declivibus 

 rubris ; costis elevatis, distinctis, postice subangulatis. 



Venus corrugata, Chemn. Conch. vii. 25. pl. 39. f. 410, 411. 



Dillw. (ex parte), Cat. i. 201 (pro figura Chemnitzii). 

 Venus scripta, var. jS. (ex parte), Gmel. p. 3286 (pro figura 



Chemnitzii). 

 Cytherea rugifera, Lamk. An. s. Vert. v. 579. no. 70. 



Hanley, Descr. Cat. p. 108. 

 Circe corrugata, Gray, Cat. Cyth. Anal. viii. 307. 

 Circe rugifem, Sow. TJies. Conch. p. 652. pl. 139. f. 44, 45. 

 Savigny, Descr. d'Egypte, pl. 9. f. 2. 



Hab. Mare Rubrum et Madagaseariense. 



8. ClRCE CROCEA. B.M. 



C. testa obliqua, forma variante, marginibus rotundatis, albida, 

 epidermide lutea induta, nonnunquam fusco prope umbones 

 biradiatim picta, intus lutea, antice concentrice sulcata, postice 



