189 



trails parum arcuatus; fossa ligament! minuta, lata , demissa; 

 umboncs paullum ante medium siti, parvi, parum prominuli; 

 denies antici 11, postici 12, validi, curvi; ?,;.| mm. N. navi- 

 cularis GOULD diversa margine ventral! magis arcuato, umboni- 

 bus prominulis, fossa ligament! GOchfeariformi. Boh. Finm. 



263. Y. pygmaca MUENST. , WOOD, PHIL. = "N. peclunculoides SMITH" 

 sec. WOOD = N. lenlicula MOLL. Boh. Finrn. 



Curdium L. 



264. G. norvegicum SPENGL. = G. Ia3vigatum PENN., MONT., TURT., 

 MACG. , BROWN, (non L., nee GHEMN. , nee LAMK.) = G. serralum 

 LAMK., DESH. , THORPE (won L., CHEMN. , nee ,BKUG.) = "G. Pen- 

 nant! BECK," REEVE. T. ovato-trigona, umbonibus parvis, co- 

 stis radiata circ. 30 obsoletis, utrinque laevigata, raargine in- 

 tus crenulalo. a) Aeque alta ac longa, obliqua, subtrigona, 

 postice subrecta, margine antico medio et ventral! parurn arcu- 

 atis, epidermide saepius violacea, pictura obsoleta, postice rufa, 

 maculosa; \ 4 j 5 , crass. 31; Yi% crass. 26; \ R ^ crass. 16 ram. 

 = "G. Pennant i BECK", REEVE; annon jun. = C. serratum 

 TURT. = G. laevigatum THORPE? /?) Longior quam alta, sub- 

 ovata, parum obliqua, sub epidermide flava rufo nubilosa 1. macu- 

 lata, |f, crass. 27; -|, crass. 15; {?;, crass. 5,8 mm. = G. 

 norvegicum SPGLR. = G. loevigatum jun. MONT. y) Altior 

 quam longa, subovata, parum obliqua, ventricosa, costis admo- 

 dum obsoletis, epidermide olivaceofusca, pellucentibus flarnmulis 

 rufis; fg-, crass. 40 mm. Boh. Norv. 



265. C. echinatum L. Kullen Norv. 



266. G. edule L. Kullen Finm. 



267. G. fasciatum "MONT.," REEVE 118, (non MONT.) = C. exi- 

 guum "GM.", MACG. (non G.M., non MONT., non PHIL.); annon 

 = G. elongatum "Mom/' TURT., (vix MONT.) T. subcordata, 

 obliqua, ventricosa, costis 25 parum convexis, anticis plicatis, 

 posticis muricatis, mediis laevigatis planiusculis; T V!;r? TI'J mm. 

 T. alba, dorso rosea, fasciis rufis concentricis, postice loeti- 

 oribus, antice rotundata, postice obtuse angulata et inferne 

 producta; inflala, postice impresso-planulata; costae parum con- 

 vexx; anticie 110 plicis prseditae semilunatis, appressis, an- 

 gustis, inferius imbricatis, angulatis, costarum latitudinem fere 

 totam occupantibus, in costis 8 10 sensim rarioribus; mediae 

 11 16 planiusculae , suepius Iaevissima3, raro inferne tuberculis 

 nonnullis minutis prasdita?; posteriores 17 25 convexae, fero 

 carinatae, muricatae squamis compressis minutis obliquis, lineam 

 mediarn modo occupantibus, primum minutis, raris, dein majo- 

 ribus, confertis, erectis, acuminatis; interstitia angustissima. an- 

 tice et postice impresso-punctata , medio capillacea, saepius lise- 

 via. Var. costis fere laevigatis. Cardia europaea misere con- 

 fusa. G. fasciatum MONT. (= C. edule jun. sec. Sow.) "si.ibor- 



