172 Pelecypoda. — Anatinacea. 



modice convexa, rotundato-ovata , saepe irregulariter flexuosa, extremitate antica 

 brevi, obtuse rotundata, postica plus minusve expansa, rotundato-truncata, margine 

 ventrali arcuato aut sinuato, dorsali utrinque leviter declivi; umbones sat pro- 

 minuli, antemediani; valvae albae, sublaeves. — Long. 10 mm. 



Distrib. : Atlanticum ad Norvegiam borealem. — Fossilis tertiaria. 



Habit. : Menorca (Mittke) ; Alger (Weinkauff), Oran (Deshayes); litora 

 Galliae (Dubkeuil) , Provinciae (Martin, Petit) , Martigues (Recluz) , Morgillet 

 (Makion), Toulon (Gay) ; Napoli, Pozzuoli (Philippi); Sicilia: prom. S. Yito 

 (Monterosato) ; Adria (Weinkauff) , litora Dalmatina (Beusina). — Fossilis 

 tertiaria. 



m 7. ?Thracia pholadomyoides Foeb. „Testa ventricosa, sinuosa, g-ra- 

 nulata, concentrice sulcata, sulcis longitudinalibus paucis (6) decussata ; umbonibus 

 acutis." Long. 40 mm. 



Habit. : Promontorium Artemisium (Forbes). 



m 8. ?Thr. Parlatoris Kob. {Aiiatina Parlatoris Calc, Cochleodesma Par- 

 latoris Monter.). „Testa ovato-elliptica, tenuis, inflata, postice rotundata, trans- 

 versim subtilissime striata, umbonibus tumidis, acutis, dente cardinali unico. Long. 

 max. 4 lin., lat. 6V2 lin. " (Calcara). 



Habit. : Liter Panormum et. ins. Usticam, Palermo, 210 org. prof. (Monteko- 

 SATo). — Fossilis tertiaria Ficaratiana. 



Poromya Fokb. {Eucharis EfiCL., Embla Lov.). Siphones inaequahs, hreves, 

 sejuncti, corona fimhriarum tentacnlarimn eircumdati; pes gracilis, ctilindricus, elon- 

 gattis, sidcatus; „testa transversa, suhacquivaJvis , omnino clansa, punctata sive gra- 

 uulata; cardo idrinque dente primario erecto suhspathnliformi, dentihus duohtts ohJi- 

 quis ad alterum aidicum" (Fokbes). 



Geuera Poromyae et Neaerae ex opinioue Pelseneer tribum coustituuut specialem 

 Septibranchiatorum , siue brauchiis typicis; brauchiae septuiu rausculare forniant 

 pede penetratuui, cavum palliale in cameram dorsalem et veutralem separaus, ori- 

 ficiis pertusum; in Poromya orificia utrinque in binis locis congesta, in Neaera 

 utrinque quaterna paria orificiorum adsuut. 



1. P. granulata Fokb. et Hly. {Corhnla ? granuJata Nyst, P. anatinoides Fokb., 

 Embla Korenii Lov. , Cuminghia parthenopaea Tib.). Testa modice convexa, ro- 

 tundato-ovata , subangularis, fere aequilatera, antice obtuse rotundata, postice 

 truncata; umbones prominuli, ante flexi, paullo antemediani; valvae post leviter 

 liiantes, tenues, cinereae, opacae, tuberculis microscopicis numerosis ubique ornatae. 

 — Long. 15 mm. 



Distrib. : 15 — 300 org. prof. ; Atlanticum ad Norvegiam borealem. — 

 Fossilis tertiaria. 



Habit. : 40 — 150 org. prof. ; Cartagena (Jepfreys); Alger, Bona, Oran 

 (Deshayes), Benzert (Jefpreys) ; litora Galliae : Collioure (Dubreuil), Marseille : 

 Caroubier, Riou, Cap Couronne (Marion) ; Napoli (Tibeki, Jefpreys); Sicilia 

 (Deshayes), prom. S. Vito, Palermo (Montekosato), Sciacca *(Del Prete) ; „Ad- 

 venture Bank" (Jeffreys); Adria : Isola, Grossa, rar. (Brusina) ; mare Aegeum: 

 inter Moream et Cerigo, Milo (Forbes) ; Creta (Spkatt, Jeffkeys). 



*2. P. neaeroides Seg. Differt a praecedente testa' latiore pro longi- 

 tudine, postice minus angulata et granulis acutis in series confertas longitudi- 

 nales, non irregulariter, dispositis. 



Distrib. : Atlanticum medium; sinus Mexicanus, in abyssis. 



Habit: In statu fossili tantum reperta species in stratis tertiariis Cala- 

 briae et Siciliae (SeCtUenza). 



