Aviculidae. — Mytilidae. 81 



1. M. edulis L. (31. incurvatus, peUucidusVEas., 31. abhreviatus, subsaxatilis, 

 retusus La:m. , 31. uuf/ulafus Sow.). Testa irregnlariter trifrona , antice gibbosa, 

 marginem posticnm versns declivis, laevis, lineis incrementi tantnm scnlpta, pur- 

 pureo-coernlescens, epidermide fusca aut atra, marj;;ine ventrali recto aut leviter 

 incurvo; umbones obtusi, leviter divergentes ; ligamentum crassum ; cardo denti- 

 culis parvis 3 — 10 in utraque valva. — Long. 60 — 120 mm. 



var. galloprovincialis Lam. (Poli, Phil., Luc, Hiu. , 31. ungidatits L., 

 31. 1ieS2)eria)iu>< Lam., Jf. jldrus, saijittafus Poli, 31. siffillatus Costa, 31. pcfafianus 

 Loc\). Diflfert a forma t3'pica testa minns inflata, multo latiore, umbonibus acutio- 

 ribus, incurvis, margine ventrali prominulo, expanso. 



Distrib. : Atlanticum arcticum, meridionale, Paciticum, Lidicum ; Pontus. 



— Fossilis in stratis tertiariis. 



Habit. : (var.) Algesiras (Hidalgo), Gibraltar (McAndrew), Malaga, Ali- 

 cante, Rosas, Aguilas, Valencia, Cartagena, Barcelona (Hidalgo, Rosenhauer) ; 

 ins. balear. : Menorca (Hidalgo), Malion (Mc Andrew, Lacaze-Duthiers, Hidalgo), 

 Palma, Mallorca (Lacaze-Duthiers) ; Alger (Weinkauff) ; litora Galliae (Petit, 

 Dubreuil) , Roussillon (Locard) , la Nouvelle (Locard) , la Franqui (P^pratx), 

 Cette (Granger), le Grau du Roi (CLfiMENT), Fos, les Martigues (Locard), Mar- 

 seille (Ancey), locis compluribus (Marion), Toulon, St. Tropez (Doublier, Gay), 

 St. Nazaire , ins. Hj^eres , Porquerolles (Locard) , Cannes (Dubreuil) ; Mentone 

 (Locard); Nizza (Risso , Vf;RANY); Corsica (Payraudeau, Requien) ; Sardinia 

 (v. Martens) ; Spezia (Tapparone-Canefri) ; Livorno, mare Ligustinum (Appelius) ; 

 Napoli (PoLi, CosTA, Scacchi); Sicilia (Philippi); Taranto (Salis) ; Adria: Ancona, 

 Rimini, Raveima (G. v. Martens), Venezia (Weinkauff), Trieste (Grube), Lesina, 

 Lissa (Heller), litora Dalinatina (Brusina), Zara (Sandri) ; Morea (Deshayes) ; 

 mare Aegeum (Forbks); Smyrna, Jaffa (v. Martens). 



Nom. vulg. : Mahon: Muselu (Hidalgo) ; Lecce : Cozza di Taranto, Cozza 

 niura , indiv. deformia : Taranto : Cozza cionca (0. G. Costa) ; Catania : Cata- 

 cozzula niura (Aradas) ; Venezia: Peoccliia [pediculi] (G. v. Martens). 



2. M. pictus BoRN {31. africanus Chemn. , 31. afer Gm. , 3i. smarafidinus 

 Duncan). Testa oblongo-trigona, solida, paullulum inflata, epidermide flavo-vires- 

 cente aut albido-brunnea tecta, interdum lineis angnlatis obscuris picta, umbonibus 

 anticis , acutis , incurvis ; margo dorsalis leviter arcuatus , posticus rotundatus, 

 basalis rectiusculus ; ligamentum elongatum, marginem dorsalem fere totum occu- 

 pans; cardo dente unico; facies interna albida, violaceo tincta. — Long. ad 120 mm. 



Distrib. : Mare lusitanicum, atlanticnm. 



Habit. : Algesiras, Gibraltar (Hidalgo) , Malaga (McAndrew), Cabo de 

 Gata (Jeffreys), Barcelona, Mahon (Hidalgo); Alger, Jijeli (Monterosato) ; 

 litora Galliae (Petit, Dubreuil), Toulon (Locard , introducta sp.); ^Adventure 

 Bank" (Jeffreys). 



Subgen. Mytilaster JIonteros. Margo dorsalis denticulatus, ventralis sinuosus ; 

 cardo dontibus et cavitatibns iis respondentibus. 



3. M. minimus Poli {31. cylindraceus Rec^u.). Testa parva ovato-oblonga, 

 tumida, coeruleo-atra, apicibus albis obtusis, margine ventrali sinuato, concavo, 

 striis incrementi grossis valde conspicuis sculpta ; forraa pervariabili ; gregaria. 



— Long. 15 inm. 



» Distrib.: Litora atlantica Galliae, Lusitaniae. 



Habit. : Litora Hispaniae: Malaga, Cabo de Palos, Barcelona (Hidalgo), 

 Valencia, Cartagena (McAndrew); ins. balear. : Mahon (McAndrew, Hidalgo) ; 

 Alger (Weinkauff) ; litora Galliae (Dubreuil), Roussillon (Locakd), Cette (Gbak- 

 Carus, Fauna mediterranea. II. 6 



