PLATE XXXVII. D7 
LINGULELLA ROTUNDA (Matthew) (p. 530. 
Ficure 3h. Exterior of a small ventral valve. U.S. Nat. Mus. Cat. No. 51770a. 
3i. Cast of interior of ventral valve. U.S. Nat. Mus. Cat. No. 51770b. 
3j and 3k. Casts of interior of dorsal valves. U.S. Nat. Mus. Cat. Nos. 51770c¢ and 51770d. 
The specimens represented are all from Locality 3i, Middle Cambrian sandy shale on McLean Brook, 1.5 miles west 
of Marion Bridge, Cape Breton, Nova Scotia. 
LINGULELLA (LINGULEPIS) ROBERTI (Matthew) (p. 557). 
Ficure 4. Ventral valve preserving a portion of the outer surface. University of Toronto, Canada. 
4a. Cast of the interior of a ventral valve, the type specimen. University of Toronto, Canada. (See note 
following 4d.) 
4b. Cast of the interior of a dorsal valve, preserving outline and convexity of valve and impressions of muscle 
scars. University of Toronto, Canada. (See note following 4d.) 
4c. Enlargement of a portion of the outer surface of the anterior portion of a dorsal valve. University of 
Toronto, Canada. 
4d. Dorsal valve distorted by compression. University of Toronto, Canada. 
The figures are all drawn from specimens in Matthew’s type material. It is possible that the specimens represented 
by figures 4a and 4b are the ones figured by Matthew [1895b, PI. I, figs. 2a and 2b, respectively], but closer identification 
is impossible. The specimens represented are all from Locality 307d, Middle Cambrian sandy limestone of Division 
E2a? at Youngs Point, near George River Station, Cape Breton, Nova Scotia. 
