164 Pelecypoda. — Tellinacea. — Anatinacea. 



Amjjludesma infermedia Thomps., S. intermedia F. et H., Semele l nter media De G^eg.), 

 Testa subcompressa, elliptica, fere aequilatera, extremitate antica rotundata, postica 

 pauUo breviore, leviter attenuata, apice obtuse acuminato ; margo dorsalis posticus 

 ad umbones impressus, dein oblique arcuatus, umbones parvi fere mediani; valvae 

 tenuissimae, fragiles, albae, pellucidae, concentrice striatae. — Long. 14 mm. 



D i s t r i b. : Atlanticum ad Norvegiam borealem. 



Habit. : 3 — 400 org. prof. ; inter Marocco et Hispaniam (Jeffkeys); Alger 

 (Weinkauff); litora Galliae (Dubreuil), Provinciae (Petit), Marseille (Maeiox), 

 Spezia (Tapparone-Canefbi) ; Sicilia (Jepfreys) , prom. S. Vito (Monterosato) ;, 

 Adria: Brevilacqua (Brusina). 



4. Syndesmya prismatica Recl. {Ligula prismatica Mtg., TeUina angidosa 

 E.EN., 8. angulosa Wkff., Erycina Aradae Biondi, E. striata Brocchi, Psammotaea 

 striata 0. G. Costa , Abra fragilis Risso, S. fragilis Loc, Scrohicidaria prisma- 

 tica Jeffe.). Testa compressa, anguste oblonga, duplo longior quam altior, in- 

 aequilatera , ante producta et rotundata , post brevis et attenuata , apice obtuse 

 acuminato infero ; umbones in 7^ postica siti ; valvae tenuissimae , albae , semi- 

 pellucidae, iridescentes, concentrice striatae. — Long. 15 mm. 



Distrib. : Atlanticum ad Norvegiam borealem; Propontis. — Fossilis in 

 stratis tertiariis Siciliae, Belgii, Angliae. 



Habit. : — 150 org. prof. ; Alger (Weinkauff), Bona, Benzert (Jeffreys); 

 Marseille : la Joliette, Riou, Garlaban, Montredon, Eatonneau, Cap Pinede (Marion), 

 port. Miou (Dubreuil, ?S. angidosa Brown); Nizza (Risso); litora pedemontaua 

 (Jeffreys); Sicilia: prom. S. Vito (Monterosato) ; „Adventure Bank", Tunis. 

 (Jeffreys) ; Adria (Renieri) , Venezia (G. v. Martens) , Trieste (Sars) , Cherso 

 (Stossich) ; Creta (Spratt, Jeffreys). 



5. S. tenuis F. et H. {Mactra fenuis Mto., Amphidesma fenue Lam., Scro- 

 hicularia tennis Jeffr.). Testa ovato-triangula, subaequilatera, tenuis, subtilissime 

 concentrice striata , interstitiis tenuissime transversim striatis ; cinereo-alba ; um- 

 bones parvi calyciformes ; ligamentum angustum, minutum. — Long. 8 mm. 



Distrib. : Atlanticum, lusitanicum, britannicum. 



Habit. : Alger, Bona (Weinkauff); litora Galliae, ins. Hyeres (Dubreuil); 

 Tunis, ad ins. Zembretti (McAndrew). 



6. S. ovata Wkff. {Erycina ovata Phil., Amphidesnia segmentum 0. G. Costa, 

 S. segmentum Recl., Lutricularia ovata Monter., Erycina Bielzii Brus., Ampliid. 

 rubiginosa Scacchi, ex opin. Weinkauff). Testa ovata, tenuis, pellucida, ovata, 

 aequilatera, postice angulata. „Differt [a E. Renieri (S. alba)] testa ovata non 

 oblonga, opaca, sinu palliali adluic majore, dentibns cardinis lateralibus approxi- 

 matis" (Philippi). — Long. 15 mm. 



{kn Ampliidesma ovata Desh.? .,Testa ovato-transversa, subaequilatera, tenui, 

 fragili, laevigata, umbonibus niinimis acutis; cardine angusto, dentibus cardinali- 

 bus mininiis, lateralibus niajoribus. Long. 12, lat. 14 mnr' (Deshayes); ,Testa 

 ovato-triangula, aut -oblonga, subinaequilatera, tenuissima, fragilis, margine supeio 

 valvae sinistrae apice utrinque carina acuta uotato; dente laterali postico remu- 

 tiore, antico apicibus proximo" (E^cluz). Morea („Expedition").) 

 D i s t r i b. : Pontus. 



Habit. : Ins. balear. : Vendrell, Palma, Cala Taulera, Malion (Hidalgo); 

 Alger, Bona (Weinkauff); litora Provinciae (Petit), la Joliette, canales sali- 

 narura, Gard (ClSment); Pomegue (Marion) ; Sardinia: Bonifacio (Rolle); Spezia 

 (Tapparone-Canefri) ; Stagno di Orbetello (Pantanelli) ; Napoii (Scacchi, Phi- 

 Lippi); lago Fusaro (Philippi); Sicilia: Palermo (Philippi), Palermo, Catania 

 (Aradas etBENOiT); litora Dalmatiae, Unie (Brusina), Cephalonia (v. Martens). 



