76 Pelecypoda. — Pectinacea. 



breuil), Marseille, Mourepiano, Cap Cavaux, Pomegue, Ratonneau, Mejean, Maire, 

 Eiou (Makion), Toulon, St. Tropez (Doubliee, Gay); Nizza (Risso, Verany) ; 

 litora pedemontana (Jeffreys) ; Corsica (Eequien) ; isola Gorgona (Appelius) ; 

 Napoli (Costa) ; Sicilia (Philippi, Aradas), prom. S. Vito, Palermo (Monterosato), 

 Messina (Seguenza) ; Lipari, Malta, Pantellaria (Aradas et Benoit, Mc Andrew) ; 

 Adria : Lissa, Lesina, Curzola , Ragusa (Heller) , Zara (Sandri) ; mare Aegeum 

 (Jeffreys), Naxia, Serplio-Pulo (Forbes). 



m 17. Pecten hyalinus Phil. {Osfreahi/aUnaVoiji, P.pellucklushxM., P.vinfo 

 Lam., P. succineus, imlcherrimus Risso). Testa elongato-ovata, tenuis, vitreo-nitida, 

 vix aequilatera, convexa, subtilissime concentrice striata, costis radiantibus super- 

 iicialibus planatis interdum fere omnino obsoletis sculpta, cinerascenti-cornea aut 

 succinea , punctis et maculis rulis et albis adspersa ; auriculae aequales ; sinus 

 byssalis profundus, angustus, margine infero subtiliter denticulato. — Alt. 20 — 24, 

 long. 25 — 28 mm. — Var. nivcoradiata Dk Gtreg. — (Vivit in tissuris saxorum, 

 inter plantas marinas, in stellis marinis.) 



Habit. : Litora Hispaniae : Rosas, Valencia, Mataro (Hidalgo), Cartagena 

 (McAndrew); ins. balear. : Malion (Hidalgo) ; litora Galliae (Petit, Dubreuil), 

 Agde (Locaed) , Marseille (Ancey) , Corbieres , Roucas-Blanc (Marion) , Toulon 

 (Petit, Gay), St. Tropez (Doubliee, Petit) ; Mentone (Locard), Nizza (Risso, 

 Vi;EANY) ; Corsica, Santa Manza (Payeaudeau, Requien); Sardinia (McAndrew), 

 Bonifacio (Rolle) ; Spezia (Tapparone-Canefri) ; Napoli (Scacchi, Poli) ; Sicilia 

 (Philippi, Aradas et Benoit), prom. S. Vito (Monterosato) ; Malta (McAndrew); 

 Taranto (Philippi) ; Adria : Lussin grande, Neresine (Grube), Lissa, Lesina, Cur- 

 zola, 20 — 40 org. (Hkllee) , Dalmatia , var. coccinea (Beusina) ; Morea (Des- 

 HAYEs) ; mare Aegeum, Paros, cap Crio, Asia minor (Foebks) ; Aegyptus, Ramleh 

 (Schneidee). 



Nom. vulg. : Mahon: Rumereta (Hidalgo). 



18. P. vitreus Jeffe. {Pallium vifrcmn Chemn., P. GcmcJfarii-filii Biondi, 

 P. Foresti [Maetin] Gay). Testa rotundata, paullo altior quam latior, aequivalvis, 

 sat convexa , alba , solidula , lineis concentricis crebris versus marginem minute 

 squamulosis striisque microscopicis radiantibus sculpta; auriculae latiusculae, in- 

 aequales, posteriores minores, anterior sinistra magna, rectangula, dextra anguste 

 linguiformis , lamelloso-striata , sinu byssali magno profundo. — Long. 18 mm. 



Distrib. : Atlanticum. — Fossilis in stratis quaternariis Siciliae. 



Habit. : Marseille, Marsilli, la Cassidagne (Mabion), Toulon (Doublier. 

 Marion) , penins. Gien (Louaed) ; Nizza (Risso , V^^rany) ; Sardinia : Bonifacio 

 (Rolle) ; Sicilia, Aci Trezza (Beenaedi, Aeadas). 



19. P. abyssorum Lov. (P. vitreus var. Jeffb.). Testa orbicularis, mo- 

 dice convexa, alba, hyalina, laevissima, lineis concentricis paullo conspicuis tantum 

 sculpta ; auriculis parvis, inaequalibus , posterioribus vix detinitis , anteriorum 

 sinistra triangula, distincte definita, dextra anguste rotundata, subtiliter radiatim 

 costata, sinu byssali breviore acuto. — Long. 12 mm. 



D i s t r i b. : Atlanticum boreale. — Fossilis in stratis tertiariis. 

 Habit. : 300 m. prof. ; inter Panormum et Usticam (Monteeosato). 

 Subgen. Hinnites Defe. Animal ei reliquorum subgenerum aequale, pes 

 elongatus, haud rudimentaris ; in statu adulto byssus nullus, testa affixa ; ocelli. 



20. P. pusio Lam. (Ostrca pusio L., 0. multistriata Poli, 0. sinuosa Gm., 

 P. sentis Reeve , P. distortus da Costa). Testa subtrigono-ovata , altior quam 

 latior, solida, medio subgibboso-convexa, infra compressiuscula , aequivalvis, sub- 

 aequilatera, liris nunierosis, 30 — 50, irregulariter scabris et hic illic squamatis 



