— 322 — 



sam obtusam praebentes, epidermicle tenui, griseo-fiavescente, 

 fibrosa, arenulis incrustata. — Long. 11 Mm. Sars. 



Pandorina arenosa MoDer Index p. 20, — (Lyonsia) Morcli Gronl. 

 p. 90. Gould et Binney p. 65 F. 381. — Sars Norv p. 81. 342. 

 Lyonsia gibbosa Hancock Anu. Mag. XVIII T. 5, F. 11, 12. 

 Hab. Mare arcticum. 



5. Lyonsia corruscans Scacchi. T. transversim ob- 

 longa, crassa, inaequilatera, leviter inaequivalvis ; latere antico 

 rotundata, postico duplo productiore truncata; striis radiantibus 

 tenuissimis, sub lente spinulosis aspera; margo dorsalis fere 

 rectilineus, ventralis aequaliter arcuatus; valv. sinistra magis 

 convexa, major; lunula anguste linearis, distincta; cardo eden- 

 tulus, fovea ligamenti perobliqua lineari; ossiculo irregulari. — 

 Long. 25, alt. 11, crass. 7 Mm. 



Tellina corruscans Scacchi Osserv. zool. p. 14. — (Osteodesma) 

 Philippi Enum II p. 15 T. 14, F. 1. — Desh. Exp. sc. Algerie 

 T. 25 f. A. — Locard Cat. p. 393. — Weinkautf Mittelm. p. 35. 

 Anatina truncata Lamarck (ed I) V p. 465. 

 Lyonsia striata Forbes Rep. p. 143. 



Hab. Mare mediterraneum. 



3. Genus Pecchiolia Meneghini 185L 



(Verticordia S. Wood 1834, nec Decandolle, Hippagus Phil. 1844, 

 nec Lea). 



C. aequivalvis, inaequilatera, cordiformis, costis radiantibus 

 sculpta, umbonibus antrorsum incurvatis, margine denticulato; 

 valv. dextra dente obhquo, prominulo et sulco ligamentali, sinistra 

 edentula, sulco elongato, hra elevata diviso ; hnea palleahs sim- 

 plex; impressiones musculares 2—3. 



1. Pecchiolia abyssicola M. Sars. C. abbreviata 

 ovato-trapezoidea, intiata, postice leviter hians, distincte inaequi- 

 valvis, valv. dextra majore, valde inaequilatera, antice brevissima, 

 anguste rotundata, jiostice expansa, fere ad lineam rectam trun- 

 cata, margine ventrah parum arcuato, dorsah antico vakle dechvi, 

 subconcavo, postico horizontah, margini ventrali subparallelo, 

 umbonibus permagnis, prominuhs, incurvatis, antrorsum sub- 

 spiraliter invohitis. Tenuis, semipelhicida, vix nitida, albida, 

 arenulis incrustata ; valvulae radiatim striatae, striis tenuissimis 

 et distantibus, intus laeves margaritaceae, cardine edentulo, 

 ossiculo hbero oblongo instructo. — Long. 5 Mm. Sars. 



Pecchiola abyssicoia (Lyonsiella) M. Sars Vid. Selsk. Forh. 1866 

 p. 257. - G. 0. Sars Moll. Norv. p. 82 T. 20, F. 6. - Jeffreys 

 Pr. Z. S 1881 p. 931. 

 Hab. mare arcticum et boreale. 



2. Pecchiolia acuticostata Philippi. C. suborbi- 

 culata, sat tumida, costis radiantibus lamelhformibus 13—15 

 tenuissime granulosis, margine serrato, denticuhs triangularibus 

 acutis, ad costas responc^entibus ; impressio muscularis antica 



