QQ Pelecypoda. — Ostreacea; Pectinacea. 



Distrib.: Atlanticum boreale, America, Rossia. — Fossilis iii stratis tertia- 

 riis Italiae, Siciliae, Angliae, in quaternariis Siciliae. 



Habit. : Gibraltar (MacAndkew), Cartagena (Jeffeeys) ; ins. balear. 

 (MacAndrew); Alger (Weinkauff); litora Galliae (Petit), Cette (Granger), 

 Marseille (Marion); litora pedemontana (Jeffreys), Nizza (Risso); Corsica (Re- 

 quien); Spezia (Tapparone-Canefri) ; Napoli (Poli); Sicilia (Philippi); Pan- 

 tellaria, Malta (MacAndrbw); Adria: Venezia, Cherso (Chiereghini, Gr. v. Mar- 

 TENs), Lesina, Lissa (Heller), Zara (Sandri). 



4. Anomia glauca Montek. (A. strlafa Lov., nec Brocchi). Testa sub- 

 ovata, striis radiata creberrimis, undulatis, imbricato-squamosis ; foramine sub- 

 triangulo , umbone submarginali ; squamae fornicatae; testa intus fundo viridis, 

 extra alba radiis rufis, nisi offuscata; variat magis minusve convexa. Diani. 

 33 mm (Loven). 



Distrib. : Atlanticum boreale. 



H a b i t. : Mediterraneum (Monterosato). 



m 5. A. hemisphaerica Brusina. Testa suborbicularis, saepe transversa, 

 tenuis, byalina; valva superior concava, inferior major valde convexa; longitudi- 

 naliter tenuissime plicata, plicis irregulariter flexuosis. Diam. 7 mm (Brusina). 



Habit. : Litus Dalmatiae, aculeis Cidaris hystricis affixa (Brusina). 



m 6. A. orbiculata Brocchi. „Valva solida, orbiculata, convexo-depressa, 

 laevis, albo rubroque radiata, intus crusta calcarea obducta, apice submarginali" 

 (Brocchi). Long. 32, lat. 29 mm. 



Habit.: Corsica (Tiberi); Palermo (Montekosato). — Fossilis in stratis 

 tertiariis Italiae. 



2. Subordo. Pectinacea Fisoher. 



Pallium omnino apertum, marginibus ocelliferis; siphones nulli; musculus 

 adductor singulus, musculus pedis prope adductorem insertus; branchiae in semi- 

 circulum dispositae, externa non appendiculata; pes byssifer aut disco terminatus; 

 cor recto pertusum; palpi dendritici; testa structura tubulosa et lamellosa, sine 

 strato fibroso , inaequivalvis aut subaequivalvis ; cardo plus minusve dentatus, 

 dentibus symmetricis, ligamentum in fovea centrali ; sinus pallialis integer. 



3. Fam. SPONDYLIDAE Ad. Margines pallii incrassati, irregulariter pa- 

 pillosi, ocellis muniti; os labiis foliaceis; pes parvus cylindricus, in discuni par- 

 vnm terminatus, sine bysso; valvae irregulares, dextra quam sinistra major, prope 

 umbonem affixa, sinistra libera; cardo utrinque dentibus duobus primariis. 



Spondylus L. Testa plerumque magna, soUda, orata, inaequwalvis , valva 

 supera convcxa, infera affixa, irregularis, costis radiatis scnlpta., plcrumque in costis 

 spinosa aut squamosa, valva affixa parte plana inter umhoncm ct cardinem, lihera 

 auriculo distincto; cardo utrinque dentibus duohus rohustis, Ugamento interno intcr 

 dentes affixo; impressio muscularis unica. 



1. Sp. gaederopus L. (Sp. acideatus Phil. nec Chemn. , Sp. contrarius 

 Chemn. , abnorm.). Testa subovata, robusta, convexa, radiatim dense striata et 

 lirata, striis acute granulatis, liris squamato-spinosis, spinis majoribus subseriatim 

 positis, valde irregularibus, promiscue contortis, interdum truncatis; valva superior 

 purpureo-violacea, inferior hxmellosa, alba, aurantio aut violaceo tincta. — Long. 

 100 — 120 mm. — Var. spinis plurimis {Sp. acideatus Phil. , Sp. americanus 

 Scacchi, nec Lam.). 



Distrib. : Atlanticum; Jladeira; ins. proniont. viridis. 



Habit. : 1 — ^130 ped. prof. ; litora Hispaniae: Carthagena (MacAndrew, 



