Aicidae. — Nuculidae. 93 



ribus decussata; sub epidermide crassa olivacea albida; umbones prominuli, obtusi; 

 area paullo expansa, concava, lunula medio tumida, lateribus fossula cincta; lijra- 

 mentum angustum ; facies interna iridescens ; margine usque ad augulum posticum 

 densissime crenato; cardo dentibus ant. 10 — IJ, post. 20 — 24. — Diam. 15 mm. 



Distrib. : Atlanticum usque ad Norvegiam meridioualem ; Propontis. — 

 Fossilis in stratis tertiariis. 



Habit. : Litora Hispaniae: Gibraltar, Malaga, Cartagena (McAndkew), 

 Cartagena (Jeffkeys), Barcelona (Hidalc.o); Alger (Weinkauff), Jijeli, Benzert, 

 Easel Amusli (Jeffreys) ; litora Galliae (Petit, Duhreuil), Marseille, l[ontredon, 

 cap Pinede, Mejean, Riou, Peyssonel (Makion), Toulon (Locard) ; Nizza (Varany); 

 litorapedemontana (Jeffkeys); Spezia (Tappakone-Canefki); Civitavecchia (Monte- 

 KosATo) ; Sicilia (Philippi, Mc Andrew, Akadas et Benoit), prom. S. Vito, Sciacca 

 (MoNTEKOSATo) , „Adventure Bank" (Jkffreys); Adria: Trieste (Sars, Gkube), 

 Lussin, Cherso (Gruue), Lesina, Lissa, Curzola, Ragusa (Heller); mare Aegeum 

 (Jeffkeys), Amorgo (Fokkes). 



2. N. nucleus Lov. {Arca nucleus L., A. manjarlfacca Bkug., iV. margari- 

 facca Lam. , Phil. , Tcllina adriatica Gm. ; juv. : N. perminima Montek.), Testa 

 obliqua, trigona, sat convexa, antice brevissime subtruncata, postice infra rotun- 

 dato-producta , raargine ventrali leviter arcuato , dorsali postice valde declivi et 

 fere recto ; solidula , obsolete radiatim striata , lineisque concentricis numerosis 

 subtilissimis obducta, alba, epidermide cinereo-viridi, intus margaritacea, margine 

 crenulato; umbones prominuli obtusi, cardo denticulis anticis 10 — 15, posticis 

 23—25. — Long. 12 mm. 



Distrib. : Atlanticum usque ad Norvegiam borealem. — Fossilis in stratis 

 tertiariis. 



Habit. : 2 — 145 org. prof. ; litora Hispaniae: Algesiras (Hidaloo), Gibral- 

 tar, Mahiga, Cartagena (McAndrew), Cabo de Gata (Jeffreys), Barcelona (Hi- 

 dalgo); ins. balear. : Palma, Andraitx, Ciudadela, Mahon (Hidalgo); Alger (Wein- 

 kauff, Montekosato), Rasel Amush (Jeffkeys) ; litora Galliae (Petit, Dubreuil), 

 Roussillon (Locakd), Palavas (Dollpus), Aigues-Mortes (CLi;MENT), Fos, les Mar- 

 tigues (Locard), Marseille (Ancey), fort St. Jean, le Pharo, la Joliette, Pomegue, 

 al. (Marion), St. Nazaire (Locard), St. Tropez, St. Raphael (Douklikr, Gay), 

 Cannes (Dautzenbekg), Antibes (Gay) ; Nizza (Risso, Viiirany) ; Corsica (Pay- 

 RAUDEAu); Sardinia (v. Maktens), Bonifacio (Rolle); Spezia (TArrAKONE-CANEFRi); 

 Livorno, Elba (Appelius); Civitavecchia (Monterosato) ; Napoli (Scacchi); Si- 

 cilia (Philippi, Akadas et Benoit), prom. S. Vito, litora meridion. (Moxtekosato); 

 Malta, Pantellaria (McAndkew); litora Tunetana (^[cAndkew, Montekosato); 

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

 Lesina, Lissa, Curzola, Lagosta, Ragusa (Brusina) ; Morea (Deshayes) ; mare 

 Aegeum : Paros, Amorgo, Smyrna, port. Suraboli, Lycia (Forbes) ; litora Aegypti 

 (Jeffkeys), Raraleh (Schneider). 



Nora. vulg. : Venezia : Sangue de Turco (G. v. Martens). 



3. N. radiata Forh. et Hly. {N. nuclrm var. Jeffk.). Testa ei N. nnclci 

 simillima sed major, longior, magis obliqua magisque inaequilatera , radiis ali- 

 quanto rubro-aurantiis nonnumquam fumosis picta, inagis minusve compressa; epi- 

 dermis nitidiuscula, olivacea, in junioribus olivaceo-lutea. — Dijfra. 13 rain. 



Distril). : Athmticura usque ad Norvegiara borealera. 

 Habit.: Gibraltar (McAndrew), Mataro, liarcelona (HiDALGtt); Fos, les 

 Martigues, St. Nazaire, Porquerolles (Locakd); Nizza (Vekany). 



4. N. tumidula Malm. Testa sat tuniida, breviter trigona, pauUo longior 



