69 



— Solen Ensis, L., caribaeus, Lam., fragilis, Pulteney 

 (= centralis, Say). — Machaera (Gould ; Solen auct.) 

 nitida, GoukI, costata, Say. — Solenotnya velum, Say, 

 borealis, Totten. — Panopaea arctica, Lam. — Glycy- 

 : meris siliqua, Cheinn. — IMya arenaria, L., ti-uncata, L. 

 ' (M. mercenaria, Say u. M. acuta, Say erklärt Gould 

 j für Varietäten der arenaria). — Corbula contractu, 

 j Say (= C. aequivalvis, Ph. in Wiegmann's Archiv), 

 i — Pandora trilineata, Say. — Osteodesma hyalina, 

 Conrad. — Anatina papyracea, Say. — Cochlodesma 

 Leana, Conrad. — Thracia Conradi, Couth. — Mactra 

 solidissima, Chemn., ovalis, Gould {= ponderosa, Vh.] der 

 Name ovalis ist an eine fossile Art vergeben), lateralis, 

 Say. — Cumingia tellinoides, Conrad. — Mesodesma ar- 

 ctata, Conrad, Jauresii, de Joannis. — Montacuta bidentata, 

 Montag. — Kellia rubra, Mont. — Saxicava distorta, Say 

 [ist wohl S. rugosa (Mytilus), L.]. — Petricola pholadi- 

 formis, Lam. (fornicata, Say), dactylus, Sow. — Psammo- 

 bia fusca, Say (hält Gould für Tellina baltica, L. Siehe 

 die Bemerkung unten). — Sanguinolaria sordida, Couth. — 

 Tellina lenta, Say, tenera, Say. — Lucina radula, Mont., 

 divaricata, L., flexuosa, Mont. (Letztere halte ich für ver- 

 schieden). — Cyclas similis, Say, partumeia, Say, elegans, 

 Gould, dubia, Say. — Astarte castanea, Say, sulcata, Mont. 

 [S. die Bemerkung unten], lactea, Brod. et Sow., quadrans, 

 Gould. — Cyprina islandica, L. — Cytherea convexa, Say. 

 — Venus mercenaria, L., notata, Say, fluctuosa, Gould, 

 gemma, Totten. — Cardium islandicum, L., pinnulatum, 

 Conr., Mortoni, Conr., groenlandicum, Chemn. (= Aphrodite 

 columba, Lea). — Cardita borealis, Conr. — Area pexata, 

 Say, transversa, Say. — Nucula thraciaeformis, Storer, 

 limatula, Say, myalis, Couth., sapotilla, Gould, minuta, Gm. 

 (= tenuisulcata, Couth. S. unten), proxima, Say, tenuis, 

 Mont. — Unio complanatus, Sol., nasutus, Say, radiatus. 

 Gm., cariosus, Say, orchraceus, Say. — Alasmodon arcuata, 

 Barnes (kann ich nicht von margaritifera, L. unterscheiden. 

 S. unten), undidata, Say, marginata, Say. — Anodon fiu- 

 viaiilis, Dillw., implicatus, Say, undulaius, Say. — Mytilus 



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