70 Pelecypoda. — Pectinacea. 



majore et intus translucente (margine frontali argute [12-] dentato [Fokbes]). — 

 Long. 13 mm. 



Distrib. : Atlanticum. ■ — ?Fossilis in stratis tertiariis. 



Habit. : 40 — 200 ped. prof. : litora Algeriae: Rasel Amush (Jeffkeys); 

 litora Galliae (Dubreuil), Marseille, Ratonneau, Peyssonel, Marsilli (Makion); 

 „Adventure Bank" (Jeffreys) ; Palermo (Abadas et Benoit, Montekosato), 

 prom. S. Vito, Sciacca (Monterosato) ; mare Aegeum: ins. Cyclades (Forbes). 



9. Lima Sarsii Lov. (Limea Sarsii Brown). Testa minuta, cinereo-alba^ 

 tumidissima, rotundato-ovata, subaequilatera aut paullulum obliqua, marginibus 

 aequaliter arcuatis , umbonibus prominulis , auriculis parvis ; valvae solidulae, 

 opacae, undique clausae, cancellatae, costis radiantibus circ. 30 sat elevatis et 

 totidem concentricis sublamellatis margine crenulato; in utroque latere foveae 

 ligamentaris denticuli nonnulli. - — Long. 5 mm. 



Distrib. : Atlanticum septentrionale et arcticum. 



Habit. : 80 — 300 org. prof.: „Adventure Bank" (Jeffreys); ins. Aeolicae, 

 Alicuri (Bkugnone , Aradas) ; Palermo (Akadas et Benoit) ; mare Aegeum 

 (Jeffreys). 



5. Fam. PECTINIDAE (Lam.) Ad. Margo pallii filamentis tentacularibus 

 et oculis inter ea munitus; brancliiae ante et infra musculo adductori adhaerentes, 

 palpi labiales trianguli, intus pectinati; pes elongatus, linguiformis , byssifer; 

 testa saepe aequivalvis, libera aut afftxa; in utroque latere umbonum auriculata, 

 sub auricula antica dextra interdum incisura ad exitum byssi; cardo edentulus, 

 ligamentum in fovea triangula sub umbonibus. 



Pecten L. Tesla obloiuja aut suborhicularis, aequivalvis aut inaequivatvis, 

 dausa, plerumque costis radiaittibiis squamulosis; auriculae aequales aut anterior 

 major, prope dextram sinus bj/ssaUs aut mdlus; margo cardinalis rectus, ligamentum 

 marginale lineare; impressio muscularis magna, subcentralis, impressio paUialis iiitegra. 



Nom. vulg. specierum generis: Italis: Pettine s. Cozza S. Giacomo (0. G. 

 Costa), Napoli: Pellerino, Taranto: Cozza cignacola (0. G. Costa). 



Subgen. Pecten Fischer (Vola Klein, Janira Schum.). Testa suborbicu- 

 laris, inaequivalvis, clausa, libera, auriculis aequalibus, sinu byssali nullo. 



1. P. maximus Chemn. {Ostrea maxima L., P. complanatus Sow., foss.). 

 Testa solidula, suboblongo-orbicularis, paullo longior quam latior, subinaequilatera, 

 inaequivalvis, valvis radiatim liratis costisque radiantibus 12 — 13 plano-convexis 

 sculptis; valva sinistra planulata, ante apicem impresso-concava , medio leviter 

 elevata, fusco-rufa aut fuscescenti-purpurea aut aurantio-fuscula castaneo alboque 

 sparsim maculata, prope umbonem violacea; valva dextra convexa, albida, supra 

 flava aut varie maculata aut zonata; auriculae aequales, oblique liratae, liris 

 interdum granulosis. — Long. ad 150 mm. 



Distrib. : Atlanticum. — Fossilis in stratis tertiariis et posttertiariis. 



Habit. : Litora Hispaniae (MacAndrew, Hidalgo), Algesiras (Jeffreys, 

 Paz), Gibraltar (MacAndrew); ins. balear. : Mahon (Weinkauff); Alger (Mac 

 Andrew, Weinkauff), Bona, Benzert (Jeffkeys); litora Galliae (Petit, Du- 

 bkeuil), Aigues-Mortes (Cl^ment); litora pedemontana (Jeffkeys); Nizza (Risso); 

 Corsica (Paykaudeau, Requien); Spezia (Tai'parone-Canefki); Sicilia: Aci Trezza 

 (Aradas); Pantellaria (MacAndrew). 



m 2. P. Jacobaeus Lam. {Ostrea Jacobaea L.). Testa solidula, oblongo- 

 ovata, aequihitera, inaequivalvis ; valva sinistra concavo-planata, costis 14 — 16 

 elevatis, supra rotundatis marginem versus subplanulatis et obsolete liratis, inter- 



