234 Gastropoda. — Aspidobranchia. 



conica, apice plns niinusve antico; impressio niuscularis formam ferri eqnini ante 

 aperti referens. 



Patella L. liosfrum non marginaium; tentacula conica , ociili promineniiis 

 ad eorum basin insidentes; margo paUii papHlosus; pes ovalis, crassus; radtda: 3. 1. 

 (2. 0. 2.) 1. 3. aut 3. 2. (l. 0. 1.) 2. 3.; testa conica ant dejjressa, ovata aut sub- 

 orhicidaris, apice subcentrali aut antico simplici, striata aut costis radiantibus. 



1. P. vulgata L. Testa depressa conica, in adultis sat elevata, costulis 

 radiantibus numerosis , inaequalibus , rugulosis , aperturam versus magis elevatis ; 

 fusco-cinerea, intus flavescens, fusco-viridi radiata; apice obtuso subcentrali aut 

 paullum antemediano. — Long. 40 — -50 mm. 



Species sec. Weinkaukk in Mediterraneo iion occurrens; tamen varietates P. vul- 

 gatae et coeruleae seriem fere continuam referunt, ita ut difficile sit limitem inter 

 has species determinare. — De Gregorio varietates nomiuat: R comina, depress- 

 aspera, nacrina, ulbula, omnes ex mari Siculo. 



Distrib. : Litora maris Atlantici. — Fossilis tertiaria Siciliae. 



Habit. : Gibraltar (Jeffrevs); litora Pyrenaeorum oiiental. (Locard), Cette 

 (Granger), Aigues-Mortes (Clement), Toulon, Porquerolles (Locard), Nizza (Risso); 

 Sardinia : Bonifacio (Rolle). 



2. P. coerulea L. (P. crcnata Gm., P. fragHisV-Hih., P. lugubris Risso, teste 

 MoNTEK., var. subplana Pot. et Mich.). Testa ovalis, vix angulata, convexa, apice acuto, 

 inclinato, cinereo-coerulescens, striis costisque radiantibus inaequalibus numerosis^ 

 raargine ad costas crenulato; facies interna coerulea, nitida, fundo albo. — Long. 

 40 — 45 mm. — Var. cimhulata De GnEci. („contorno marginale piii ellittico"). 



Distrib. : Mare lusitanicum. 



Habit. : Litora Hispaniae : Malaga, Cartagena, Valencia (Martix, Gmelix, 

 Dillwyn), Barcelona (Hidaloo); ins. balear. : Menorca, Mahon, Mallorca, Iviza- 

 (HiDALGo); Alger (Weinkauff); litora Galliae (Petit), Roussillon (Bucc^uoy, 

 Dautzenreiut, Dollfus), Port-Vendres, CoUioure, Leucate (Locard), Cette (Gkax- 

 ger), Aigues-Mortes (Dubreuil), Marseille: portus, Pharo, TEstaque, Montredon 

 (Maeion), Toulon, St. Tropez, St. Raphael (Doublieh), St. Nazaire, Porquerolles 

 (Locard), Cannes (Dautzenberg), Mentone (Locard), Nizza, Genova(VfiKAXY, Risso); 

 litora pedemontana, Spezia (Jeffreys); Corsica (Payraudeau); Sardinia: Bonifacio 

 (Rolle); Spezia(TArPARONE-CANEFRi); Livorno(AprELius); Napoli(ScAccHi); Sicilia, 

 (Philippi); Taranto (Sai-is); Adria: Venezia (Weinkauff), Trieste (Sars, Grube), 

 Dalmatia (Sandri, Hkisina); Morea (Desh.wes); Syria (Gaillardot-Puton). 



m 3. P. ferruginea Gm. {P. Lamarckii Payk., P. vulgata Scacchi, P. pli- 

 cata Costa, P. costoso-plicata Hid.). Testa ovata, pyramidata, rufescens aut grisea, 

 costis radiantibus coinpressis obtusis tuberculatis , niagnitudine subalternantibus, 

 super marginem prominentibus, intus alba, fundo lacteo , badio marginato. — 

 Long. 100 mm et ultra. — Var. impcndoria De Greg. forma pyramidata; var. 

 vitta De Ghecj. costis minoribus aequalibus. 



Habit. : Ins. balear. : Mahon (Hidalgo); Alger: prom. Matifou, Bona (Wein- 

 kauff); Antibes (Petit, Doubliek); Corsica (Paykaudeau, Requien); Sardinia: 

 Bonifacio (Rolle); Monte Cristo? (Appelius); Napoli (Scacchi); Sicilia: Palermo, 

 Trapani, perrar. (Phimppi); ]\[orea (Deshayes); mare Aegeum. abund. (Fohhes); 

 Alexandria Aegypti (]\I(^m.eh, Weinkauff). 



m 4. P. Rouxii 1'ayr. (P. fcrruginea var. Wkff.). Testa magna, ovalis, 

 convexo-elevata, cpidcrmide fusco-nigricante, sub epidermide alba nitida, costis 

 radiantibus parvis aequalibus; apice elevato, acuto ante inclinato; intus albida. 

 — Long. (i<) mm. 



