116 Pelecypoda. — Chamacea. Conchacea. 



St, Raphael (DuBKEUiL, Gay), St. Nazaire, St. Tropez, Porquerolles (Locabd), 

 Cannes (Dautzenbeect) ; Mentone (Locaed), Nizza (Risso, V:^eany) ; litora pede- 

 montana (Jeffkeys) ; Sardinia : Bonifacio (Rolle) ; Spezia (Tappaeone-Canefei) ; 

 Livorno (Appelius) ; Napoli (Scacchi) ; Ustica (Calcaea) ; Sicilia (Philippi, Aea- 

 DAs et Benoit), Palermo, var. (De Geegoeio), Messina (Seguexza) ; Malta (Mc 

 Andeew) ; Adria: Venezia (Naedo, G. v. Maetens), Pirano (v. Maetens), Trieste 

 (Geube), Zara (Sandri), Lissa (Heller), ubique commun. (Beusina, Stossich); 

 mare Aegeum, frequ. (Foebes), ? Smyrna in spongiis (De Geegorio) ; litus Aegypti 

 (Savigny), Ramleh (Schneidee). — Fossilis in stratis tertiariis. 



Nom. vulg. : Mahon: Ostia borda (Hidalgo); Venezia: Ostreghette del 

 duro (G. v. Maetexs). 



ni 2. Chama sinistrorsa Brocchi (67?. grypliina Lam., 67«. christeUa Doubl., 

 var. mediterranea De Geeg.). Testa irregularis, Ch. [iriiplmde multo crassior et 

 rohustior, imbricata, squamis inaequalibus plerisque appressis ; umbo valvae inferae 

 sinistrorsus ; dens cardinalis valvae inferae crassissimus, obtusissimus, crenulatus, 

 valvae superae humillimus pauUo distinctus, sed fossa magna profunda adjacente 

 crenulatus. - — Diara. 25 mm. 



Habit. : Mahon (Hidalgo); Alger (Weinkauff); litora Galliae (Dubeeuil), 

 Aigues-Mortes (CLfiMENT), les Martigues (Petit), le Phare, Pomegue, Morgillet 

 (Maeion), Toulon (Doubliee), St. Nazaire, Porquerolles (Locaed) ; Corsica (Re- 

 quien) ; Spezia (Tappaeone-Canefri) ; Livorno , Civitavecchia (Monterosato) ; 

 Napoli (Scacchi) ; Ustica (Calcara) ; Sicilia (Philippi, Aeadas et Benoit) ; Adria : 

 Trieste (Stossich), Zara (Sandei), Lesina (Hellee). 



m 3. Ch. circinata Monter. „Testa dextrorsa, orbicularis, subtus con- 

 vexa, rosacea aut carneola, utraque valva lamellis foliosis distantibus, non inter- 

 ruptis, suberectis, laciniatis ornata. " — Diam. 25 — 35 mm. 



H a b i t. : In fundis coralligenis , saepe coralliis aflixa , in Mediterraneo et 

 Adriatico, mari Tunetano (Monterosato). 



9. Subordo. Oonchacea Fischer. 



Pallium orificiis tribus , posticis binis siphonalibus ; pes byssifer aut sine 

 bysso ; adductores duo ; branchiae inaequales, externa appendiculata ; testa aequi- 

 valvis, regularis, libera ; cardo heterodon, dentibus lateralibus 2 non constantibus ; 

 ligamentum externum. 



17. Fam. GLOSSIDAE Stol. {Cyprinidae Ad., nec Bonap.). Animal ovale 

 crassum, pallium ante apertum, siphones breves sejuncti ; pes linguiformis, sulcatus, 

 interdum fovea byssali, palpi longi angusti, trigoui; testa aequivalvis, plerumque 

 ovata aut cordata, epidermide nitente; umbones prosogyri; cardo dentibus 2 — ^ 

 primariis, interdum 1 — 2 lateralibus anticis et posticis. 



Isocardia Lam. (Glossus et Glossoderma Poli, Bucardinm MctJj-e. v. M.). 

 Pallitmi manjine duplici ; siphones sessiles, approximati, fimhriati; palpi longi, angusti, 

 branchiae magnae suhaequales; pes securiformis, sulcatus, cavitate hi/ssifcra munitus; 

 testa cordata, ventricosa, clausa, inaequilatera, umhones incurvati aut spirales, proso- 

 gi/ri; lunula incompleta, areamdla; Ugamentum externum ; dentes primarii utrinque 2y 

 laterdlis singulus jjosticus. 



1. I. cor Lam. (Chama cor L. , Bucardia communis Schum. [v. KcUiella 

 miliaris, supra p. 103]). Testa cordata, subglobosa, solida, haud nitens, subtiliter 

 concentrice striata, sub epidermide castanea subtilissime ciliosa lutescenti-alba, 

 in junioribus rufo-fusco variegata ; margo anterioi" cum dorsali prominente angulum 



