198 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
LINGULELLA COLUMBA (Raymond) 
Lingula columba RAymMonp, Amer. Journ. Sci., ser. 4, vol. 20, p. 368, 1905; Ann. Carnegie 
Mus., vol. 7, No. 2, p. 218, pl. 33, figs. 3, 4, IQTI. 
Horizon and locality.—Chazyan limestone, Valcour Island and Chazy, Platts- 
burg (15’) Quadrangle, N. Y.; and Isle La Motte, Rouses Point (15’) Quad- 
rangle, Vt. 
LINGULELLA DECORTICATA Cooper, new species 
Plate 9, E, figures 14, 15 
Shell thin, small for the genus; length about 14 times the width; sides gently 
convex, subparallel; anterior margin broadly rounded; anterolateral extremities 
narrowly rounded ; apical angle about 85° ; posterolateral margins nearly straight 
and forming indistinct shoulders at about one-fifth the length from the beak. 
Greatest width at about the middle. Surface marked by fine, crowded concentric 
lines. 
Pedicle valve with fairly evenly but gently convex lateral profile; unbonal re- 
gion slightly the more convex part of the valve; anterior slope long and gentle; 
anterior profile moderately convex. 
Brachial valve slightly more convex than the pedicle valve and with broadly 
rounded posterior margin. Beak small, protruding slightly posterior to the mar- 
gin; lateral profile most convex at about the middle; anterior profile more con- 
vex than that of the pedicle valve; somewhat swollen in the medial region with 
moderately long and steep lateral slopes. 
Measurements in mm.—Length 11.2, width 7.3. 
Type.—Holotype: 116757. 
Horizon and locality—Elway formation in Virginia: 4 mile east of Belfast 
Mill, Saltville (T.V.A. 212-NE) Quadrangle. 
Discussion.—This species differs from L. lirata in having a less attenuated 
posterior. 
LINGULELLA ENDOPUNCTATA Cooper, new species 
Plate 8, G, figures 15, 16 
Shell small for the genus, lustrous dark brown to black in color ; longitudinally 
elliptical in outline with rounded lateral margins, narrowly rounded anterior and 
bluntly pointed posterior extremities. Brachial valve deepest slightly posterior 
to the middle, with a moderately steep and short posterior slope but with a longer, 
convex but gentle anterior slope. Moderately strongly convex in anterior profile ; 
umbonal region swollen; median region full; lateral slopes moderately steep. 
Median elevation indistinct but present. Pedicle valves too poorly preserved for 
description. Surface poorly preserved but the ornamentation consisting of more 
or less distant concentric undulations. 
Measurements in mm.—Holotype, length 7.3, width 4.5. 
Types.—Holotype : 109320b; figured paratype: 109320a; unfigured paratypes: 
109320c-e. 
