Terebiatulidae. 57 



loiifritudinaliter cuiinata : lostruni paulluluin inourvatum, foramine magno circu- 

 lari incompleto , laminis duabus parvis dt4tidiaceis ; valvulae costulis radiantibus 

 notata ; appendices brachiales membrana unitae lobos duos magnos laterales 

 brevemque medium spiralem formantes. Lonjr. IH — 17, lat. 14 — IS, alt. (5 — 8 mm. 

 — var. inflata lb;i, Pretk: Sciacca, Sicilia (Del Prete). 



Distrib. : Atlanticum. — Fossilis in stratis pliocenicis Italiae. 



Habit. : Litora Hispauiae: Cabo de Gata (G\v. Jeffreys) : Minorca, For- 

 nells (HiDALGo); Alger (Weinkauff) ; Tunis (Reeve); litora Francogalliae (Du- 

 bkeuil), ad oras regionis nRoussillon" (Locard), Marseille, in salo prof. (Fischer), 

 La Cassidagne, Peyssonel (Mariox), PorqueroUes (Liicard), Saint-Xazaire (Gay), 

 Toulon (Petit, Douhlier, Gay) ; litora pedemontana (Jkkkkkys), Nizza (Risso, 

 Roux, ViiRANY); Civitavecchia (Moxterosato); Corsica (^Payhaudeau, Re^uien); 

 Sardinia (E. v. Martens), Bonifacio (Rolle); Napoli (Staz. ZooL); vadum „Ad- 

 venture Bank" („Porcupine") ; Sicilia: prom. S. Vito (Moxterosato) , fundi co- 

 ralli^eni prope Sciacca , Sicilia (Del Prete) , ibidem Oculinae virgineae afti.xa 

 (Monterosato) , mare siculum (PHiuirpi) , Palermo (Aradas et Bexoit, Moxtk- 

 RosATo), Catania (Aradas et Bexoit) ; Napoli (Scacchi), Capri, Ischia, Palmieri, 

 Taranto (Costa) ; Adria (Brusina), Sebenico, Lesina (v. Martens) ; Morea (Des- 

 hayes); mare Aegeum: Naxia, Serpho-Poulo , ad saxa ^Ananas", prom. Crio, 

 Asia minor (E. Forbes). 

 , Nom. vulg. : Minorca : Ametlons (Hidaloo). 



^ 3. Subfam. Platydiinae Dall. Brachia sigmoidea, sine lobo medio spirali. 



Platydia Costa {3Iorrisia Dav.). Arcus fulrri brachialis parms, non re- 

 ^ticuiLi, j./rorcssi(i i^arco Jurcato in cenfro valrulae affixus; valculae crosse punctatae, 

 foramine in tifraque pertuso; processus cardinalis nullus. 



1. Pl. anomioides Costa {Orthis anomioides Scacchi , Phil. , Jforrisia 

 anoniioidc!^ Dav., Terel/rafuUi apprcssa Forb., T. senii)iuluni Phil.). Testa parva, 

 tiansverse ovalis aut fere orbicularis , semitranslucens , flavido-alba , conspicue 

 canalibus minutis perforata, foramen niagnum; valvula dorsalis fere plana, medio 

 depressa, umbone semicirculariter exciso ; valvula ventralis convexa, linea cardi- 

 nalis recta , area parva ; laminae deltidiaceae parvae ; superticies glabra , lineis 

 <;oncentricis accretionis notata ; rami convergentes fulcri brachialis cardiui et 

 margini superiori septi parvi mediani verticalis afflxi; animal appendicibus j^arvis 

 sigmoideis labialibus. Long. 4, lat. 5, alt. 2 mm. — (Ex opinione clar. Monte- 

 rosato Ter. appressa Forb. species alia, forma sceleti interni dentiformis foramen 

 versus curvati distincta est. — T. seminulum Phil. ex eiusdem autoris sententia 

 margine interno laevi a Pl. anomioide et CisteUa neapolifana ditfert.) 



Dis"trib. : Athinticum, Paciticum. — ^ Fossilis in stratis pliocenicis Siciliae. 



Habit. : Mediterraneum , 40 — 120 org. , litora Tunetana („Porcupine\ 

 Jeffreys); Marseille, La Cassidagne, 150 — 200 m (Mariox), Toulon (Dubreuil, 

 Locard) ; Corsica (Requien) ; fundi coralligeni prope Sciacca , Sicilia (Monte- 

 RosATo); Messina, 150 — 200 m prof. (Segukxza), Palermo (Aradas et Benoit); 

 Napoli (Scacchi, Costa) ; mare Aegeum, ad sax. „Ananas", Lycia, prom. Crio, 

 91 org. (Forbes). 



2. Pl. Davidsoni Dall. {3Iorrisia Davidsoni E. Dslgch. , Tcrrbrafula 

 Jhtvidsoni Rekve, Zellania J)avidsonii Chenu, Mrgerlea truncata monsfruosa [ScacchiJ 

 Jeffr.). Testa parva, semicircularis aut transverse ovata, saepe inaequilatera, 

 subpellucida, lutescens, irregulariter concentrice striata, punctis numeiosis spinu- 

 losis aspra ; valvula dorsalis plana, foramine magno semicirculari, linea cardinali 

 recta; valvula ventralis convexa, angulis cardinalibus rotundatis, laminis duabus 



