Lyousiiilae. — Aiiatinidae. 171 



Distiil). : Atlanticiun ad Scandinaviam ; Sitka. — Fossilis pliocenica Sici- 

 liae, Angliae. 



Habit. : 4 — 628 orjr. prof. ; Gibraltar (McAndrkw, Jeffreys); isla del Rey, 

 Mahon (Hidalgo); Alp:er ( WEixKArKF) , Oran (Deshayes) , Rasel Anmsli (Jeff- 

 RKYs); litora Galliae (Maktin, Jkffkkys); Toulon (Dkshayes), Hyeres (Dihkeuil); 

 Sicilia: Aci-Trezza (Abadas); Adria: Venezia (Olivi, Chiereghini), Brevilacqua 



iBKrSINA). 



3. Thr. papyracea Wkff. {Tellma papymcea Puli, Mya declids Tl-kt., 

 Th. pliascoloiihs Xiexek, var. Tli. rillosittscula MacG.). Testa sat convexa, distincte 

 inaequivalvis, oblonga, antice anguste rotundata, post brevior, abrupte truncata, 

 niargine ventrali aequaliter arcuato, dorsali utrinque paullo declivi, fere horizon- 

 tali ; uinbones pone mediuin siti, haud prominuli, ligamentum externum sat eleva- 

 tum; valvae tenuissimae, albae, subhieves, plica ab umbonibus ad angulum in- 

 feriorem posticum radiante ; ossiculum semicircuhire. — Long. 23 mm. 



Distrib. : (' — (i40(?) org. prof.; Atlanticum ad Norvegiam borealeiu. — 

 Fossilis in stratis tertiariis. 



Habit. : litora Hispaniae: Malaga (McAndeew), Cartagena (Jeffkeys), 

 Barcelona, Mataro (Hidalgo); Mahon (McAndrew); Alger (Weinkauff), Oran, 

 Bona (Deshayes); litora Galliae (Petit, Dubkeuil), Roussillon, etang de Thau 

 (Locard), Cette (Granger), le Gard (Clement), Marseille: Garlaban (Mariox), 

 Toulon (DouBLiER, Gay) ; Nizza (Vi^:kany); litora pedemontana (Jeffkeys); Corsica 

 (RfiyuiEN); Spezia (TAprARONE-CANEFRi) ; Marzocco, Livorno (Aitelius) ; Napoli 

 (Scacchi, Philippi); Sicilia (Philippi, Aradas et Benoit); Malta, Tunis (Mc 

 Andrew); Adria: Brevilacqua , rar. (Brusina), Zara (Sandri); mare Aegeum 



(FORBES). 



4. Thr. praetenuis Pult. {CocUlodesma praetemie Couth., Periploma pnie- 

 tenuis McAndr. , P. myalis Coll. de Ch. , C. leaiia Caill.). Testa compressa, 

 elongato-ovata, leviter inaequivalvis , ante late rotundata, post paullo brevior et 

 multo angustior, apice rotundato-truncato ; umbones paullo antemediani, subpro- 

 minuli, postice crista arcuata detiniti; ligamentum externum minimum et inconsiti- 

 cuiim, valvae intus ad umbones crista brevi arcuata, cardine processu magno 

 cochleariformi, ossiculo falcato. — Long. 27 mm. 



Distrib. : — 50 org. prof. ; Atlanticum. 



Habit. : Nizza (Dubreuil) ; Napoli (Jeffreys) ; Sicilia (Jeffreys) , Aci- 

 Trezza (Aradas), Palermo (Benoit); VAdria (Chiekkghini). 



m 5. Thr. COrbuloides Desh. (juv. : Th. oralis Phil., ex opin. jroNTEKos.). 

 Testa transvwse-ovata, iiuiequivalvis, inaequihitera, parte antica parabolice cur- 

 vata breviore, margine dorsali postico recto, ventrali convexo medio subanguLato, 

 extremitate postica biangulata , cristis 3 ex umbone decurrentibus quarum una 

 margini dorsali proxima biangulata; grisea, punctis minutis aspera; umbones 

 magni, dexter inferior emarginatus. — Long. 45 mm. 



Habit. : Cartagena (Jeffreys); Mahon (Hidalgo); litora Galliae (Dubreuil), 

 le Gard (Cl^ment), Marseille (W^einkauff), fort St. Jean, chateau dlf (Makion), 

 Toulon (DouBLiEK, Gay, Reeve); Corsica (Rft(iuiEN); Napoli (Scacchi) ; Sicilia: 

 Palermo (Monterosato), Palermo, Catania, rariss. (Aradas et Benoit); Taranto 

 (Philippi); Adria: Zara (Sandri), Grado, Cherso, Lussin (Stossich), Brevihicqua 

 (Brusina). 



6. Thr. distorta Brown {3Iya distorta Mtg., Th. oralis Phil.. Th. hrcris 

 Desh., Erycina anodon Phil., Th. Casani Ar. et Calc, Th. fabnla Piiii.., ex opiii. 

 MoNTER. , Osteodesmn infiatnm Dan. et S. , forma anomala, sec. Hkus.). Testa 



