VENUS.— Plate XVI, 



Of a characteristic oblong form, witii a very sliort an- 

 terior side. 



Species 67. (Mus. Coming.) 

 Venus Casin.^. T^en. teddlenticulari,faha,femtgineo- 

 fitsco lincld, concentrice laminato-costatd, cosiis ru- 



dibus, subirregularibtts, lamina parvd interveniente. 

 The Casixa Venus. Shell lens-shaped, inlvous, tinged 



with rust-brown, concentrically laminately ribbed, 



ribs rude, rather ii-reg-idar, with a small lamina in 



the interstices. 

 LiNN/EUs, Syst. Nat. p. 1130. 



Femis reflexa, Montagu. 



Venus lactea, Donovan. 



Venus disciua, Lamarck. 



Venus Riistenicii, Payraudeau. 



Venus intei-media. Gray. 



Venus casinula, Deshayes. 

 Hal. European Seas. 



This well-kuov.'n species appears to have been named 

 after a town in Campania, on the shores of the Mediter- 

 ranean. 



Species 6S. (Mus. Cuming.) 



Venus undatella. Ven. testd ovafd, snbcompressd, ca- 

 rulescente-albd, violaceo-fusco Uneari-toidatd et macu- 

 latd, radiatim regnlariter liratd, Ui-is versus marginem 

 obsoletis, concentrice liratd, Uris versus marginem un- 

 datis, confertis et validioribus, ared Ugamenli subhile 

 excavatd, conspicue strigatd. 



The waved Venus. Shell ovate, rather compressed, 

 bluish-white, lineally waved and blotched with violet- 

 brown, radiately regularly ridged, ridges obsolete 

 towards the margin, concentrically ridged, ridges 

 waved, close-set and stronger towards the margin, 

 ligamcntary area rather broadly excavated, conspicu- 

 ously striped. 



SowEiiBY, Pro. Zool. Soc. 183.5. p. 22. 

 Hab. Gulf of California. 



A rather pale-marked species, with the sculpture much 

 changing in its development towards the margin. 



Species 69. (Mus. Cuming.) 



Venus fusco-lineata. Ven. testd oblongo-omtd, sub- 

 guadratd, albidd, Uneis uigricante-violaceis undatis 

 pictd, radiatim costatd, costis obtuse planatis, postice 

 angtdatis, anticis subacute crenatis. 

 The bkown-lined Venus. Shell oblong-ovate, some- 

 what square, whitish, painted with dark-violet waved 

 lines, radiately ribbed, ribs obtusely flattened, angled 

 posteriorly, anterior ribs rather sharply crenated. 

 Sowekby, Pro. Zool. Soc. 1835. p. 41. 

 Tapes fusco-lineata, Sowerby, jun. 

 i Rab. Guacomayo, Central America (in sandy mud, at the 

 1 depth of thirteen fathoms) ; Cuming. 



Crossed thi-oughout with elegantly-defined pencillings 

 of dark violet. 



Species 70. (Mus. Curaing.) 



Venus histrionica. Ven. testd subquadrato-ovatd, com- 

 pressinsculd, albd, cinereo-fusco conspicue maculatd, 

 \ undique nitide crenato-reticnlatd, lunula intense fused. 



' The patched Venus. Shell somewhat squarely ovate, 

 rather depressed, white, conspicuously blotched with 

 ash-brown, neatly erenately reticulated throughout, 

 lunule dark-brown. 

 So-WERBY, Pro. Zool. Soc. 1835. p. 41. 

 Hab. Guacomayo, Central America (in sandy mud, at the 

 depth of thirteen fathoms) ; Cuming. 

 Very closely allied to V. granulata, though more com- 

 pressed and delicately sculptured. 



