 | John Stark - 1828 - 542 Seiten
...inequivalve. Gen. 22. MELEAGRINA, Lam. — Mytilus, Lin. Shell subequivalve, rounded, scaly without ; a sinus at the posterior base of the valves for the passage of the byssus, the left valve being notched and narrow at this place ; hinge linear, without teeth ; ligament marginal, elongated, almost... | |
 | John Warren - 1834 - 262 Seiten
...' hcteroptera, ' Atlantica, ' semisagitta, ' Tarentina, ' costellata, 2 fossil species. MELEAGRINA. Shell subequivalve, rotundate, nearly square, externally...narrow and channelled; hinge linear, without teeth. Facet of the ligament marginal, elongated, nearly external, dilated in the middle. M. margaritifera,... | |
 | 1823 - 450 Seiten
...equivalve, quadraio-rotundate, externally squamose ; lower cardinal margin straight, anteriorly not caudate. A sinus at the posterior base of the valves, for the passage of the byssus ; margin of the left valve at that part narrow, emarginate. Hinge linear, without teeth. Facet of the... | |
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Shell subequivalve, rotundate, nearly square, externally squamose; the inferior cardinal margin straight, not caudate anteriorly; a sinus at the posterior base of the valves, for the passage of the byssus; the left valve being at this place narrow and... 