PILATE) XX. 69 
LINGULELLA ELLSI (Walcott) (p. 495). 
Fiaure 3. Ventral valve, the type specimen, slightly distorted by compression, showing the area. U.S. Nat. Mus. Cat. 
No. 27315a. 
3a. Cast of a ventral valve, showing the area and outlines of the visceral cavity. U.S. Nat. Mus. Cat. No. 
27315b. 
3b. Dorsal valve crushed down into the ventral valve. U.S. Nat. Mus. Cat. No. 27315c. 
3c. Dorsal valve slightly distorted by compression. U.S. Nat. Mus. Cat. No. 27315d. 
The specimens represented are all from Locality 220a, Ordovician siliceous shales at the Grand Trunk railroad 
bridge over Chaudiere River, Quebec, Canada. 
LINGULELLA La&vis Matthew (p. 512). 
Figure 4. A large dorsal valve, the type specimen. University of Toronto, Canada. Specimen figured by Matthew 
(1892, Pl. XII, fig. 4b]. 
4a. Ventral valve flattened in shale. University of Toronto, Canada. Specimen figured by Matthew [1892, 
Pl. XII, fig. 4a). 
4b. Ventral valve flattened in the shale. University of Toronto, Canada. 
The specimens represented are all from Locality 301n, Upper Cambrian shales near the falls at St. John, New 
Brunswick. 
LINGULELLA LEVIS GRANDIS Matthew (p. 512). 
Figure 4c. Cast of the interior of a dorsal valve from Locality 325b, Upper Cambrian shale at Escasonie Shore, East 
Bay, Cape Breton, Nova Scotia. University of Toronto, Canada. Specimen figured by Matthew 
[1903, Pl. XV, fig. 1d]. 
LInGULELLA (LINGULEPIS) spaTULA (Walcott) (p. 558). 
Figure 5. Nearly perfect ventral valve, the type specimen, from which the outer surface has been exfoliated. U.S. 
Nat. Mus. Cat. No. 35290a. ; 
5a. Dorsal valve preserving concentric and radiating striae beneath the outer surface. U.S. Nat. Mus. Cat. No. 
35290b. 
5b. Cast of the dorsal valve, showing cast of median ridge and pits on the inner surface. U.S. Nat. Mus. Cat. 
No. 35290c. 
The specimens represented are all from Locality 74d, Middle Cambrian sandstones in Bass Canyon, Grand Canyon 
of the Colorado, Arizona. 
