182 Ampliiueura. — Gastropoda. 



Mopaloidea Caep. Valva caudalis sinu et utrinque iissura singula munita. 



Acanthochiton (Risso) Leach. {Anisochiton Fisch. p.). Testa irregularis, 

 valva posterior parva utrinqiie incisa in lamina insertionis, margine postico sinuoso; 

 dentes valvae anterioris numerosi (posticae nulU) longi; zona pilosa, fasciculis spicu- 

 lorum elongatorum ornata. 



1. A. fascicularis Montee. (Chiton fascicularis L. , A. carinatns Risso, 

 A. (liscrepans p. Montee. antea). Testa subcarinata, valvarum carina longitu- 

 dinaliter striata lateribus squamuloso-granulatis , limbo lato spinis brevibus, ad. 

 valvarum junctiones utrinque 7 et in margine ceplialico 4 fasciculis setarum 

 longiorum instructo ; niargo spinis mediae longitudinis timbriatus ; incisurae 5 in 

 valva ceplialica, singula utrinque in quaque valva intermedia, et 2 in valva postica; 

 plerumque nigreseens, carina albida. — Long. ad 20 mni, lat. 10 mm. 



D i s t r i b. : Atlanticum. 



Habit. : Gibraltar, Malaga (Mc Aisdeew, an spec. sequ. ?); Majorca (Weix- 

 kauff) ; Alger ( Joly , Wkinkauff , Monteeosato , var. gracilis) ; litora Galliae 

 (Petit), Roussillon (Locaed), Port Vendres, Collioure, Banyuls (Bucquoy, Dautzex- 

 BEEG, DoLLFus), Palavas (DoLLFus), a Cette ad Aigues-Mortes (Dubbeuil), Mar- 

 seille (Ancey, Maeion), St. Jean, le Pliaro, TEstaque, Montredon, Morgillet, Ra- 

 tonneau, Pomegue (Maeion), Toulon, St. Raphael (Doubliee) ; Nrzza (Risso, V^ieany) • 

 Genova (V]6eany); litora pedemontana (Jeffeeys); Corsica (Payeaudeau) ; Sar- 

 dinia : Bonifacio (Rolle) ; Spezia (Tappaeone-Canefei) ; Livorno, Gorgona (Appe- 

 lius); Napoli (Scacchi), Granatella di Portici (Poli); Sicilia: ins. Cyclopum, 

 Catania (Philippi, Calcaea), Palermo, Trapani, Magnisi (Monteeosato); Adria: 

 Venezia (Olivi), Trieste (G. v. Maetens); Dalmatia: Bua, Fortis (G. v. Maetens); 

 Morea (Deshayes); mare Aegeum ''Fuebes). 



Nom. vulg. : Venezia: Salissoni Cape (G. v. Maetens). 



2. A. discrepans Montee. (Chiton discrepans Beown, A. communis Risso, 

 Ch. fascicidaris var. major Phil.). Testa oblonga, carinata, carina longitudina- 

 liter striata aut lineata, areae pars reliqua granulata ; zona lata, spinulis brevibus 

 tecta, spinis marginalibus ejusdem longitudinis, fasciculi totidem ac in A. fasci- 

 culari, sed spinis brevioribus. Plerumque viridescens, granulis parvis numerosis. 



Distrib. : Atlanticum. — Fossilis in stratis tertiariis. 



Habit. : Litora Hispaniae: Algesiras, Cartagena, Mataro (McAndeew, 

 HiDALGo) ; ins. balear. (Mc Andeew) , Mahon (Hidalgo) ; Alger (WeinkaufFj 

 ?LiNN]fi); Roussillon, frequ. (Bucquoy, Dautzenbeeg, Dollfus), Marseille, Ra- 

 tonneau, 35 m (Maeion), Cannes (Depontalliee) ; Nizza (Risso); Genova (VSeany); 

 Spezia (Tappaeone-Canefei) ; Gorgona (Caifassi) ; Civitavecchia (Monteeosato) ; 

 Sardinia (Tibeei) ; Sicilia : Palermo (Philippi, Monteeosato), Cefalu (Philippi), 

 Magnisi (Monterosato) ; Adria : Zara (Sandei, Jeffreys). 



3. A. aeneus Risso {Ch. graciUs Jeffe. , teste Montee.). Testa raagis 

 arcuata , carinata , rubescens , areis rostralibus (carina) lineatis fere aeque latis ; 

 granulis numerosis, inter A. fascicularera et discrepantem mediis; fasciculis brevi- 

 bus uti in aliis speciebus dispositis et uno ad terraini postrerai raediura; zona 

 coriacea, setulis perbrevibus sparsis obtecta, raargine crinito. — Long. ad 25 rara, 

 lat. 13 rara. 



D i s t r i b. : Atlanticura. 



H a b i t. : Ins. balear. (Hidalgo, teste Monteeosato) ; Nizza (Risso) ; Ge- 

 nova (Issel); Gorgona (Caifassi); Napoli, Sicilia: prora. S. Vito, Palerrao (Mon- 



TEROSATO). 



