Donacidae. — Psamraobiidae. 135 



D. vittatus Jekkr. {Cuneus vittattis da Co.^^ta, D. anatinm F. et H, p., 

 I). venusta Wkff. p.). Testa transverse oblonga, mediocriter inaequilatera, autice 

 laevis. postice striis radiautibus concentricisque subtiliter decussata, lutescens, 

 fusca aut purpurea, saturatius anuulata, plerumque radiis tribus albidis , intus 

 alba. postice violacea, niargiue sr.btiliter crenulato ; cardo dextra dente primario 

 centrali bifido, plicistiue duabus divergentibus, lateralibus utrin<iue binis, sinistra 

 dentibus priniariis binis divergentibus, laterali singulo utrinque. — Long. 25- 30 nmi. 



D i s t r i b. : Atlanticum. — Speciem saepe aliis confusam adducimus, ut discri- 

 niinatio fieri possit. Dubreuil mentionem speciei facit ut in litora Galliae re- 

 pertae ; Jeffret.'! eam Adriaticam dicit. 



22. Fani. PSAMMOBIIDAE Fischer. Palliiim raarginibus papillosis; siphones 

 perlongi, sejuncti; pes linguiformis, acutus, non byssifer; palpi mediocres, triau- 

 gnli; brancliiae inaequales, externa appendiculata, quam interna minor; testa 

 aeqnivalvis, transversa aut ovata, subaequilatera, utrinque paullo hians; cardo 

 plerumque utrinque dentibus binis primariis, sine lateralibus, ligamento externo, 

 nymphis crassis, prominentibus; sinus pallialis profundus; margo internus valvarum 

 non crenulatus. 



Psammobia Lam. {Garl Schuji.). PalUum aperium, fimhrlatum; slplw)ics 

 pcrtonyi, (jraciles, fere aequales, orificiis papiJlosis; pes ma<jnus; palpi Jonc/i subulati; 

 tcsta transversa, subaequilatera, utroque latere paullispcr hians, epidermide cornea tecta; 

 cardo dextra dentibus 2 inaequalibus, posteriore fortiore, sinistra antcriore fortiore 

 hifido, posteriore oUiquo, ad nymphas appresso; impressio pallialis a margine remota. 



1. Ps. vespertina Lam. {Lux vespertina Chemn. , Tellina Gari Poli, 

 Ps. ftorida Desh.; juv. : Ps. fraf/ilis Payk.). Testa ovali-oblonga, latere postico 

 in adultis paullo longiore, laevissima, striis incrementi subtilissimis tautum sculpta, 

 postice vix angulata, colore pervariabili, plerumque flavescens albido radiata et 

 tessellata, umbones vlolacei, intus alba , crocea aut violacea ; cardo dextra denti- 

 bus 2, sinistra 3 medio majore bifido; sinus pallialis angustus, profundus, rotun- 

 datus, angulus fere nullus. — Long. nO, alt. 27 mm. 



Distrib. : Atlanticum usque ad Xorvegiam. — Fossilis in stratis tertiariis. 



Habit. : — 40 org. prof. ; litora Hispaniae: Algesiras (Hidalgo), Gibraltar 

 (Mc Andbew), Barcelona, Rosas (Hidalgg) ; ins. balear. : Mallorca, Menorca, Mahon 

 (HiDALGo); Alger (Weinkauff, Monterosato), Cap Lindeles, Eashgun, Cap Falcon 

 (Deshayes) ; litora Galliae (Petit, Dubbeuil), Eoussillon, la Nouvelle (Locard), 

 Palavas (Dollfus), Cette (Locard), dept. du Gard (ClSment), Marseille (Ancey), 

 fort St. Jean, la Joliette, Pharo, Eoucas-BIanc (Marion), T ulon (Gay), St, 

 Tropez (Doublier), St, Nazaire, Porquerolles (Locard); litora pedemontana (Ca- 

 pellini); Corsica: Ajaccio, Santo-Manza, rara (Payraudeau, E^quien); Sardinia 

 (v. Martens), Bonifacio (Eolle); Spezia (Tapparone-Canefri); mare Etruscuni 

 (Appelius); Napoli (Poli, Scacchi, Philippi); Sicilia: Palermo, Messina (Philippi, 

 Aradas), Catania (Aradas); Malta (Mc Andkew); Taranto (Salis); Adria: Chioggia 

 (v. Martens), Trieste, Cherso (Grube), Zara (Sandri), Lesina, Curzola (KellerI, 

 Brevilacqua, Eagusa (Stossich); mare Aegeum (Forbes); Aegyptus: Eamleh 

 (Schneidkr). 



Nom. vulg. : Mahon: Guitziis petits (Hidalgo); Lecce: Cozza de Brinuisi 

 (0. G. Costa). 



2. Ps. ferroensis Lam. (TeUina ferroemis Chemn. , T. incarnata Penn., 

 nec L., Ps. incarnata Desh,, T. muricata (Brocchi), T. radiata da Costa, T. tri- 

 fasciata Don., Gari mdgaris Schum.). Testa compressa, anguste oblongo, fere 

 jaequilatera, antice rotundata, postice paullo attenuata et oblique abrupte truncata, 

 [augulo infero magis prominente, margine ventrali fere recto, dorsali utrinque 



