Mesodesmatidae. — Mactriflae. 143 



Distrib. : Atlanticum. — Fossilis iii stiatis tertiariis. 



Habit. : Litora Hispaniae : Algesiras, \'alencia (Hidalgd), Barcelona (La- 

 CAZE-DuTHiEKs, HiDALGo) ; Mahon (McAndrew, Hidalgo) ; Alger (Weinkaupf), 

 Cap Falcon, Oran, Habibas, Arzew, Bona, Lacalle, Cherchel (Deshaves); litora 

 Galliae (Petit, DrnKEUiL), Eoussillon, hx Nouvelle (Locard), la Franqui (P^;- 

 1'katx), Cette (Grangek, Petit) , Pahivas (Dollfus), Aigues-Mortes (Cli:;ment), 

 le Grau du Roi, Martigues (Locard), Marseille (Axcey), le Prado, Roucas-Bhinc 

 (Marion), Toulon (Locard, Doublier, Gay), St. Raphael (Doublier, Gay); Men- 

 tone (Locard), Nizza (Vsrany); Corsica (Payraudeau, RfiyuiEN); Sardinia: Boni- 

 facio (Rolle); Spezia (Tapparone-Canefri) ; Livorno (Appelius); Napoli (Scacchi) ; 

 Siiilia (Philippi, Aradas et Benoit) ; „Adventure Bank" (Jeffreys); Tunis (Mc 

 Andrew); Taranto (Salis); Adria : Venezia (G. v. Martens, Weinkauff), Zara 

 (Sandri), Grado, Capodistria, Veglia, Spalato, Ahnissa (Stossich), Meleda, Cur- 

 zoha (Bkusina); Morea (Deshayes); mare Aegeum (certis in locis, Forhes), Smj^-na 

 (Fleischer), Jaffa (v. Martens) ; Aegyptus (Fischer), Ramleh (Schneider). 



Nom. vulg. : Mahon: Escupina bestia (Hidalgo); Teramo: Paparazzi di 

 mare {0. G. Costa) ; Siracusa : Cocchiohi janca (Akadas et Benoit) ; Venezia : 

 Bibaron de marino (G. v. Martexs). 



Forma typica (sec. Weinkaukf^ = 31. itiflata Phil. , var. alba, zouis lacteis 

 = M. corallina L., var. testa tenuiore loiigiore = M. cnierea Mtg., stultorum L., 

 var. testa tenuiore, tota alba = 31. Jactea Gm., Payr., Lam. 



3. M. subtruncata Mtg. {M. trlangula Ren., 31. ladea Poli, M. Targionil 

 Ar. et Ben.). Testa ovato-triangula aut triangula, subaequilatera , concentrice 

 striata , lateribus sulcatis , alba , epidermide flavidula , marginibus acutis , latere 

 postico subrostrato , pauHo hiante , anguhito ; hmuhi distincta , elongato-cordata, 

 sulcata, medio elevata ; area angulis circumscripta. — Diam. 25 lum. 



Distrib. : Atlanticum ad Norvegiam; Pontus. 



Habit. : — 60 org. prof. ; litora Hispaniae: Algesiras (Hidalgo , Jeff- 

 reys), Gibraltar (McAndrew, Jeffreys), Malaga (McAndrew), Barcelona, Ma- 

 taro (Hidalgo) ; ins. balear. : Conejera, Mallorca, Mahon (Hidalch)); Alger (Wein- 

 kauff), Cap Lindeles, Cap Falcon, Bone (Deshayes) ; litora Galliae (Petit, Du- 

 bkeuil) , Port Vendres , Roussillon , ha Nouvelle (Locakd) , Pahwas (Dollfus), 

 Cette (Granger , Locakd) , le Grau du Roi (Locard) , Marseille (Ancey) , fort 

 St. Jean , la Joliette , le Prado , Roucas-Blanc (Marion) , St. Nazaire , Mentone 

 (Locakd); Nizza (Risso); litora pedemontana '(Ji''1''*'Reys) ; Corsica (RSijuikn); 

 ?Livorno (Appelius); Sicilia (Philippi, Aradas etBENorr); Adria: Rimini (v. Mak- 

 TENs), Venezia (Weinkauff), Grado, Trieste, Armissa (Stossich), Zara (Sandri), 

 Brevihicqua , Spahito (Brusina) ; Morea (Deshayes) , Creta (Spratt , Jeffreys). 



4. M. solida L. {M. vulgaris Chemn., M. truncata Mtg., M. castanea, crassa- 

 tella La.m., 31. eUiptica Brown, var.). Testa trianguhi, convexa, solidissima, striis 

 concentricis ad margines et in dorso plerunique himellosis sculpta, vestigiis in- 

 crementi distinctissimis, lutescenti-alba, epidermide fuscescente plerumque detrita; 

 niargo anterior truncato-rotundatus, posterior magis compressus ; umbones tumiduli, 

 apice minimo, incurvo ; dens primarius utrinque bilidus, laterales dextra duplices, 

 sinistra simplices, fovea cartilaginis triangula; sinus pallialis brevis linguiformis. 

 — Long. 40 mm. 



Distrib. : Athinticum niedium et boreale. 



Habit. : (l — 205 org, prof. ; Cabo de Gata (Jeffreys); ?Capo S. Alessio, 

 Sicilia (Philippi); Adria: Venezia (G. v. Maktens). 



5. M. olorina Phil. Testa transversim ovata , trigona, tumidiuscuha, in- 



