— 40 — 



dice convexa, angulo dorsali valde obtuso, margine ventrali ar- 

 cuato, laminis parum numerosis (18 — 20) medio appressis, utrin- 

 que liberis, tenuibus, postice angulato-recurvis; T J!g> cr. 5, 

 2 mm. Kullen — Finm. 



289. V. ovata Penn., Mont., Lamk., = V. radiata Brocchi, Phil., = 

 V. pectinula Lamk. = V. spadicea "Ren.'' Nyst. Kullen — Finm. 



290. V. undata £enn. ? Mont. , Phil. , (Lucina) Lamk., Turt., Brown, 

 (Cytherea) Macg., (Artemis) Recl. Boh. — Finm. 



291. V. virago n., = Y. virginea Angl. , (non L.) ; an == V. 

 virginea var. latere antico attenuato-elongato Turt. Biv. 156?; 

 an = V. florida Lamk. ? — T. crassiuscula, modice convexa, 

 elliptica; umbones ad \ anticam siti, parvi, parum tumidi; mar- 

 go dorsaJis posticus modice arcuatus, angulum obsoletum prae- 

 bens, pone ligamentum utrinque in carinam obtusam elevatus, 

 cum margine ventrali sub anguJo subacuto rotundato confluens; 

 margo anterior subrectus; lunula cordato-Janceolata, vix impres- 

 sa; sulci concentrici Jineares, regulares, passim leviter undati, 

 postice profundius exarati, juxta marginem ventraJem crebri , 

 irregulares. Dentes divergentes, extimis angulum rectum 1. sub- 

 obtusum formantibus; in valva sin. rnedius validus, bifidus, an- 

 ticus compressus, prominuJus, posticus tenuis, cultratus; in v. 

 dextra medius et posticus bifidi, anticus compressus, cultratus. 

 Sinus paJliaris semiellipticus, Jat. ad Jong. = 1:1,8, medium 

 testce non attingens; angulus acutissimus. CoJore var. a) alba 

 lineoJis rufis fulguratis, in radios tres interruptos congestis; /?) 

 roseo-alba, rufo punctata, radiis quatuor angustis albis spadiceo 

 macuJatis. Lunula in utraque rufa, area ad medium Jigamenti 

 utrinque macula angulata spadicea, umbones unicoJores, rosei, 

 apicibus flavis; £|, cr. 28; |£, cr. 22 mm. — Forma inter V. 

 Deshaysii Hanl. 16,35 = Chemn. VII, 439 a Turt. citatam, et 

 Chemn. VII, 443 (= V. texturata Lamk. etc.) a Mont. citatam 

 fere intermedia. (Sars, Koren dd.) Norv. 



292. V. aurea Gm , Mont., Turt., Lamk., Phil. = V. literata L. F. 

 S. (non S. N.) Boh. — Norv. 



293. V. pullastra Mont. , Turt. , Lamk. (Venerupis) Flmg. 



Boh. — Finm. 



Saxicava Fl. de Bell. 



294. S. rugosa (Mytilus) L., Mont., Don., Turt. , Lamk. = Myt. 

 phoJadis L., Muell , (Saxicava) Lamk., Desh., Turt. = Mya bys- 

 sifera 0. Fabr. = S. distorta "Say," Gould. — Cardo plerum- 

 que edentulus, nymphae intus tumidae. KuJJen — ■ Finm. 



295. S. arctica (Mya) L,, Muell. , 0. Fabr., (Cardita) Brug., (Hia- 

 teJla Daud.) Lamk., (Anatina) Turt. (d. card. v. d. fracto?) = 

 Chama acuJeata Strom = "Donax rhomboides Poli" (Saxicava) 

 Desh. = S. distorta "Say" Gould. — «) Antice oblique trun- 



cata, 



