PLATE LXXXIV. 281 
TREMATOBOLUS INSIGNIS Matthew (p. 617). 
Fieure 5. Natural cast of the interior of a ventral valve. University of Toronto, Canada. Type specimen, figured 
by Matthew [1893a, fig. 1b, p. 276]. (See fig. 5a.) 
da. Cast taken from the natural mold of the interior of the ventral valve represented by figure 5. U.S. Nat. 
Mus. Cat. No. 52211a. 
5b. Interior of a ventral valve. University of Toronto, Canada. Specimen figured by Matthew [1893a, fig. la, 
p. 276]. (See fig. 5c.) 
5c and 5c’. Top and back views of an artificial cast of cine interior of the ventral valve represented by figure 5b. 
U.S. Nat. Mus. Cat. No. 52211b. 
The two specimens represented are both from Locality 301, Middle Cambrian sandstones of Division 1b2 of Matthew 
[1895a, p. 108], on Hanford Brook, St. John County, New Brunswick. 
TREMATOBOLUS PRISTINUS (Matthew) (p. 621). 
[Pl. LX XXIII, figs. 2, 2a-h.] 
Ficure 6. Reproduction of a small block of rock showing numerous specimens. Locality 2i, Middle Cambrian sand- 
stones of Division 1b3 of Matthew [1895a, p. 108], on Hanford Brook, St. John County, New Brunswick. 
U.S. Nat. Mus. Cat. No. 522138. 
