43 
Unicam valmlara prope Aci-Castello inveni. 
Tesla 9"' lala, 8'" longa, 5^"' crassa, (fossilium major,) siiLrotundo - ovala, com- 
pressa; latus posticum latum, longius. Laniellae concentricae, elevatae, distantes, ad latus 
posticum raajores, patentes, subdenticulatae : ad anticum recurvatae, incumbentes. Aj'ea 
non distincta, lumila cordato-oblonga. Cardo omnino fere ut in Cytherca eccoleta, sed 
impressio miiscularis postica subrotunda, antica subrotunda, minorj sinus palliaris brevis, 
subtriangularis , obtusus; angulus palliaris aequalis, brevis, obtusus. Margo crenulatus. 
Color e flavescente albidus, maculis magnis angulatis, lineisque purpureo-vinaceis irregu- 
laribus variegatus, lunula rufo-purpurea. Specimina corsica omnino albida; caeterum eo- 
rum descriptio exacte convenit. Venus casinoides lalere antico angulato ; V. casina testa " 
inflata, subcordata, lunula cordata, V. plicata, testa inflata, antice angulala etc. differunt. 
2. Venxis verrucosa L. 
V. testa cordato-rotundata, convexa, longiludinaliter obsolete striata et lamellis 
transversis crebris, postice inpiimis verrucosis, cincta, lunula cordata. 
L. Gm. p. 3269. Laruk. V. p. 586. Poli t. 21. f. 18. 19. V. Ei?YcmA Penn. brit. zool. 
4. t. 54. f. 48. V. Lemani Payr. p. 53. t. 1. f. 29. 30. 31. bcne juvems. 
Frequentissiraa in toto littore Siciliae. 
Testa 24'" lata, 21"' longa, 15 — 16'" crassa. 
3. Venus Brongniarti Payr. 
V. testa crassa, compressiuscula , ovato-trigona, lamellis transversis, crassis, dis- 
tantibus, erectis, cincta; hmula cordato-oblonga. 
VEiSus Brongmakti Payr. p. 51. t. 1. f. 23. 24. 25.— Venus Paphia Ren. V. Dysera 
wiNoR Broc. p. 541. et 670. t. 16. f. 7. — Bast. p. 88. — Dubois t. 5. f. 15. 16. 17. , 
bcne. — AsTAUTE Dysera Dela Jonkaire. 
Rarissima; Panormi et Aci-Castello valvulas singulas inveni. 
Testa 5i"' lata, 4|'" longa, 3'" crassa (foss. 9'" longa, 8'" lata, 4'" crassa,) 
ovato - trigona, compressa, lalere postico longiore, subrecto, margine dorsali antico concavo; 
extremitates obtuse angulatae ; lamellae transversae septem (in foss. majoribus novem), cras- 
sae, aut reflexae, elevatae, praesertim in latere postico, aut depressae planae. Lunula 
cordato - oblonga, marginem dorsalem anticum totum occupans, parum sulcata ; area lanceo- 
lata, subcanaliculata, pariter marginem dorsalem posticum totum occupans. Cardo valvu- 
lae dextrae dentes tres ostendit, quorum medius validus, subbifidus; valvulae sinistrae den- 
tes duos simplices. Impressioncs mnsculares subaequales, anterior oblonga, posterior sub- 
rotunda; sinus pnUiaris parvus, magnitudine impressionis muscularis; impressio palliaris 
a margine valde remota; margo crenulatus. Color albus, roseo maculatus. 
4. Venus ejfossa Bivon. mscr. t. IIL f. 20. 
V. testa suborbicidari, subglobosa, transversim undato-sulcata et tenuissime striata, 
lunula late cordata, profundissime impressa. 
6* 
