Atlantidae. — Siphonariidae. 433 



4. A. fusca SouL. „Testa vitrea, discoidea, late carinata, tenuissima, 

 Iiellncida, jiallide fnlva vel rosea; spira niinima, exsertiuscula, conica; anfractibus 

 5 — 6, convexis. ultimo carinato; apertura ovato-subacuta , postice i"eflexiuscula, 

 antice leviter emarginata; peristomate tenui, acuto; operculum vitreum, subtri- 

 angulare, teuue, pellucidum, paucispiratum" (Souleyet). 



D i s t r i b. : Maria omnia. 



Habit. : Napoli, Palermo, S. Vito, 100 — liOO m (Monterosato). 



Oxygyrus Benson (Ladas Caxtk.). Animal Atlantae simile; testa lactea, 

 nantiJoidra, invohda, utrinqne anguste nmhiticata. anfractns nltimus carinatus; aper- 

 tura cordiformis, sine fssnra; opercnlnm triannulnm magnnm, ritreum, sine nucleo 

 spirali. 



1. 0. Keraudreni McAndr. (Atlanta Eeraudreni Les., Ladas Keraudreni 

 Cantb., AttantaBivonae Pirajxo, teste Tib., Atl. CostaeVm., teste Phil.; stat. juv.?: 

 Belterophina minnta Forb.). ..Testa cornea, flavescente, utrinque umbilicata, an- 

 fractibus convexis, striatis, ultimo carinato, apertura subrotunda, autice vix sinuata; 

 animal colore rosaceo" (Gegenbaur). — Magnit. (i mm. 



D i s t r i b. : Atlanticum, in salo. 



Habit.: Nizza (VfiRAXY, E. Leuckart), Genova (Verany); Sicilia: Messina 

 (Cantraine, Philippi, Gegexbaur). 



IV. Ordo. Pulmonata Cuv. 



L Subordo. Thalassophila Gray. 



l. Fam. SIPHONARIIDAE Gray. Aninial anipliibium, sacco pulmonali et 

 brancliia transversa mnnitum ; mandibula arcuata : radula seriebus transversis denti- 

 culorum forniata; testa patelliformis ; impressio muscularis sinu laterali, apertura 

 pulmonali effecto, interrupta. 



Siphonaria Sow. Caput magnum, planum, sine tentaculis, in tohos duos 

 iiapicdcs, ocidos ferentes divisnm, apertura respiratoria dextra; dens centralis radidae 

 iinicnspis, laterales hicuspides, marginales tricuspides, hreves, transversi; testa solida, 

 asi/mmetrica. intus nitens, apice centrali aut suhcentrali, paullimi sinistrorso; impressio 

 muscidaris hippocrcpia, hipartita. 



1. S. Algesirae Quoy et Gaim. [S. striato-punctcda Wkff.). Testa ovalis, 

 convexa, elevata, tenuissime striata, apice excentrico, rotundo; fusca, albido ra- 

 diata, intus fornice aurantiaco et fusco, rarius albido; margine indiviso. — Long. 

 20 mni. 



D i s t r i b. : Atlanticum lusitanicum. 



Habit.: Litora Hispaniae: Algesiras (Quoy et Gaimard), Gibraltar (Des- 

 HAYEs, McAndrew), Malaga (McAndrew, Hidalgo); Alger (Weinkauffj. 



Anisomyon Meek {Alterya Morch, Scidulum Mtrs., Wittiamsia Mtrs. 

 postea, Capulacmaca Sars). Testa ancytiformis, parva, tenuis, apicc suhcentrcdi, iti 

 juniorihus spirato. 



m 1. A. Gussonii Dall (AncijJns Gussonii Costa, Gadinia Gussotiii Jeffe., 

 Scutulum, postea }Vill iatnsia Gussonii MTRi^., Tcctnra Gussoitii Loc, Patcda peltucicla 

 Phil., Piliscus Gussonii Morch, Tectura virgittca Wkff., Acmaea virginea Petit, 

 Patelloidea vitrea Cantr., Tectura Gussonii Loc). Testa tenuissima, pellucida, 

 laevissima, obovata, gibba, rufo-fuWa, vertice acuto, versus marginem inflexo, 

 saepe ei superposito. — Long. 7, lat. G ram (Philippi). 



Carus, Faiina mediterranea. 11. 28 



