Box 26, Folder 1: Paleontology Draft 7: AcePhala I

CLASS

MOLLUSCA

Animals soft with a hard covering of one or more pieces called "shells".

Aceph [?] Fan. Mactridoe [?]

Genus Aligena, [pencil notes P.3 p 500=Erycesinderm[?] H.C. Lea, Tr. Am. Phil. Soc. (New sev.) [illegible, p 238 (1846)

Shell equivalve . ? sub=equilateral, closed posteriorsly + auteriosly; hinge with one cardinal tooth, and a long shallow sulcation under the beaks.

[Pencil sketch, 2 shells]

Aligena striata

Aligena striata, H.C. Lea, Tr. Am. Ph. soc. vol 9 p 238 [vol?] 34 fig 13

Shell transverse, subelliptical, rounded auteriorly [?]+ posteriorly, inflated, thin, striate; stroe [?] concentric, very large near the basal margin; umbonial slope elevated, somewhat angulate; basal margin curved; dorsal margin angular in the middle, curved posteriorly + auteriorly; beaks prominent, incurved, nearly smooth; cardinal tooth very small; sulcation long, nearly transverse; margin entire within.

L. 0.21 H. 0.19 d. 0.10

Medial Tertiary

Aligena loevis H.C. Lea Tr Am Ph. Soc. Vol 9 p 238 [?] 34 fig 14

Shell transverse, subquadrilateral, posteriorly rounded, anteriorly sub= truncate, convex, inflated, smooth; basal margin straight, dorsal margin angular in the middle, curved anteriorly + posteriorly; beaks somewhat prominent, incurved; cardinal tooth long, sulcation wide, short, nearly transverse; margin entire within.

L. 0.22 H 0.18 D 0.14