218 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
Lingula lyelli Billings, RaymMonp, Ann. Carnegie Mus., vol. 7, No. 2, p. 218, pl. 33, fig. 5, 
(fig. 6, doubtful), rorr. 
Lingula lyelli Billings, Stnciatr, Trans. Roy. Soc. Canada, ser. 3, vol. 39, sec. 4, p. 67, 1045. 
Types.—Lectotype (G. W. Sinclair, 1945): G.S.C. 1027C; paratype: G.S.C. 
1027, 
Horizon and locality—Aylmer formation (Rockcliffe member), Allumette 
Island, Ottawa River, Pontiac County, Ontario, Canada. 
ECTENOGLOSSA NYMPHA (Billings) 
Lingula nympha Biiirnes, Geol. Surv. Canada, Paleozoic fossils, vol. 1, p. 214, fig. 198, 
1865.—Am1, Ottawa Nat., vol. 8, p. 85, 1804. 
Ectenoglossa nympha (Billings) Srnctatr, Trans. Roy. Soc. Canada, ser. 3, vol. 39, sec. 4, 
p. 64, pl. 2, figs. 3-6, 1945. 
Types.—Lectotype (Sinclair, 1945): G.S.C. 553; paratype: G.S.C. 553. 
Horizon and locality —Table Head series, Table Head, Newfoundland. 
ECTENOGLOSSA NYMPHOIDEA Cooper, new species 
Plate 2, E, figures 12-20; plate 6, B, figure 6 
Lingula nympha Raymonp (not Billings), Bull. Mus. Comp. Zool., Harvard Coll., vol. 68, 
No. 6, p. 293, pl. 1, fig. 1, 1928. 
Shell large for the genus, length equal to about twice the width. Lateral mar- 
gins gently curved; the greatest width located at about the middle. Anterior 
margin narrowly rounded. Beak angle about 80°. Surface where preserved 
marked by concentric lines. 
Valves subequal in depth, moderately convex in profile with the greatest con- 
vexity and depth located in the posterior third. Anterior profiles moderately 
convex but with the top of the curve flattened. Anterior two-thirds flattened 
and with long gentle slopes to the front margin. Lateral slopes steep in the pos- 
terior third but becoming more gentle anteriorly. 
Interior details difficult to determine but pedicle valve thickened slightly an- 
terior to the middle and in a path extending anteriorly along the median portion 
of the valve by the growth track of the large anterior muscles. Median ridge 
present in the brachial valve. 
Measurements in mm.— 
Length Width Thickness 
Holotype (pedicle ‘valve), .'5."s 0's i. a: sus cas 51.3 26.7 3.0 
Paratype (brachial valve 71822a) .......... 52.1 25.3 4.5 
og Gig ff * UmggaBo), !2b)2,. athe 36.1 19.2 2.0? 
Types.—Holotype: 109292d; figured paratypes: 71822a, 109289, 109292e, 
109297a,b; unfigured paratypes : 71822b, 109292a-c,f ; figured specimens: 109293, 
116778a. 
Horizon and locality—Whitesburg formation in Tennessee: On Bulls Gap 
(T.V.A. 171-SE) Quadrangle, under the Southern RR. bridge about 1,000 feet 
east of the station at Bulls Gap; road cut # mile southeast of Whitehorn; rail- 
