PLATE XXXII. 
h. Central muscle scar. j. Anterior lateral muscle scar. 
LINGULELLA DAVIDSONI (Barrande) (p. 489). 
Fiaure 1. Partly exfoliated ventral valve, the type specimen, showing lamellated shell, from Locality 303m, 
Ordovician, Etage d4, at Lieben, Bohemia. Enlarged one-third. Copied from Barrande [1879b, 
Pl. CIV, fig. vur:1A]. 
la. Side view of the specimen represented by figure 1. Copied from Barrande [1879b, Pl. CIV, fig. virr:1b]. 
lb. Less elongate ventral valve than that represented by figure 1, from Locality 303n, Ordovician, Etage 
d4, at Wraz, Bohemia. Enlarged one-third. Copied from Barrande [1879b, Pl. CIV, fig. vmr:3A]. 
lc. Side view of the specimen represented by figure 1b. Copied from Barrande [1879b, Pl. CIV, fig. vur:3b]. 
1d. Enlargement of the area and posterior portion of figure le. Copied from Barrande [1879b, Pl. CIV, fig. 
vur:4E]. 
le. Interior of a ventral valve from Locality 3030, Ordovician, Etage d4, at Lodenitz, Bohemia. Copied from 
Barrande [1879b, Pl. CIV, fig. vi1:4]. 
LINGULELLA? rnsons (Barrande) (p. 508). 
Fieure 2. Interior of ventral valve from Locality 303d, Lower Ordovician, Etage dl, at Swarow, Bohemia. Copied 
from Barrande [1879b, Pl. CV, fig. x:4A]. 
2a. Partly exfoliated dorsal valve from same bed as specimen represented by figure 2. Copied from Bar- 
rande [1879b, Pl. CV, fig. x:3A]. 
2b and 2c. Interior of ventral valves, showing area, from Locality 303e, Lower Ordovician, Etage dl, at Sta. 
Benigna, Bohemia. Copied from Barrande [1879b, Pl. CV, figs. x:5A and x:6A, respectively]. 
Figure 2c represents the type specimen. 
2d. Enlargement of the area of figure 2c. Copied from Barrande [1879b, Pl. CV, fig. x:6E]. 
2e. Enlargement of surface of shell and impression of interior surface from the anterior portion of the valve. 
Locality 303d, Lower Ordovician, Etage dl, at Swarow, Bohemia. Copied from Barrande [1879b, 
Pl. CV, fig. x:1f]: 
Lineuia? exrmra Barrande (p. 301). 
V'icureE 3. Fragment of the shell greatly enlarged to show complex character of the surface ornamentation. Inserted 
for comparison. Locality 3031, Lower Ordovician, Etage d1, at Libetschov, Bohemia. Copied from 
Barrande [1879b, Pl. CV, fig. r:f]. 
LINGULELLA? SIMPLEX (Barrande) (p. 534). 
Tiaure 4. Ventral valve showing portion of area where the thin shell has been pressed down into it. Locality 303p, 
Lower Ordovician, Etage d3, near Beraun, Bohemia. Copied from Barrande [1879b, Pl. CIV, fig. 
vi:lA]. 
4a. Dorsal valve from Locality 303a, Lower Ordovician, Etage d3, at Trubin, Bohemia. Copied from Bar- 
rande [1879b, Pl. CIV, fig. vr:4A]. ‘ 
4b. Side view of specimen represented by figure 4a. Copied from Barrande [1879b, Pl. CIV, fig. vr:4B]. 
OBoLus (PALHOBOLUS) BRETONENSIS (Matthew) (p. 426). 
Fiaure 5. Cast of the interior of a flattened ventral valve, the type specimen, slightly compressed laterally. University 
of Toronto, Canada. Reproduced froma photograph of one of Matthew’s specimens; it may be the one 
used by him in drawing figure 2b of his paper [1903, Pl. IX], but closer identification is impossible. 
5a. Cast of part of the interior of a ventral valve. University of Toronto, Canada. 
5b. Exterior ofa nearly entire dorsal valve. University of Toronto, Canada. Reproduced from a photograph 
of one of Matthew’s specimens; it may be the one used by him in drawing figure 2d of his paper 
[1903, Pl. LX]. 
5e. Exterior of a dorsal valve, showing finely preserved outer surface. University of Toronto, Canada. Repro- 
duced from a photograph of one of Matthew’s specimens; it may be the one used by him in drawing 
figure 2a of his paper [1903, Pl. IX]. 
5d. Cast of part of a broken dorsal valve in which the area is preserved. University of Toronto, Canada. 
5e. Enlargement of a cast of the interior of a dorsal valve. University of Toronto, Canada. Reproduced from 
a photograph of one of Matthew’s specimens; it may be the one used by him in drawing figure 2e of his 
paper [1903, Pl. LX]. 
The exact locality represented by the specimens figured is not known. It is probable, however, that they were 
all collected at the type locality (344b), Middle Cambrian shales of Division E3d of Matthew’s Etcheminian, Dugald 
Brook, Cape Breton, Nova Scotia. 
Fiaures 5f and 5g. Exterior of nearly perfect ventral and dorsal valves, from Locality 10p, Middle Cambrian sand- 
stones of Division E2b of Matthew on Dugald Brook, Cape Breton, Nova Scotia. U.S. Nat. Mus. 
: Cat. Nos. 51664a and 51664b, respectively. 
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