154 
Case and 
Column of 
Drawers. 

Fl ¢2 
Qo 
Gdé6é 
Gdé 
Gd? 
Gd6é 
Gdé 
FC 
FC 
FC 
FC 
FC 
Synopsis: and Figures of Genera. 
SILURIAN. 


Reference to McCoy’s 
Names and References; Observations, &c. 
Numbers and Localities. 




Capulus, p. 290. 
SN 

Capulus? p. 290. 



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| 
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Acroculia, Phillips. More spiral than Capulus, 
and often spinose or tubercular. 
Acroculia haliotis, Sow. (Siluria, 2nd ed. pl. 24, 
fig. 9). A most characteristic Wenlock shell 
—the food of Crinoids, especially of Marsu- 
piocrinus. 
Acroculia, sp. 2. 
Acroculia, sp. 3. Very much angulated whorls, 
a small species. 
Acroculia, sp. 4. 
Acroculia prototypa, Phil. (Siluria, 2nd ed. pl. 
24, fig. 8). Very much like a Nerita in 
look. 
Pleurotomaria, Sow. A genus allied to Scissu- 
rella, and has the mouth deeply notched. 
It is chiefly paleozoic, i.e. the species with 
a convex base. 
Pleurotomaria undata? Sow. (Siluria, 2nd ed. 
pl. 24, fig. 6). 
Pleurotomaria, minute sp. 
Pleurotomaria Fletcheri, Salter, n. sp. 
Pleurotomaria undata, Sow.? (Pl. undata, Sow. 
Siluria, 2nd ed. pl. 24, fig. 6.) 
Pleurotomaria balteata, Phill. (Mem. Geol. 
Surv. Vol i1. pt. 1, p. 358, pl. 15, figs. 1, 2). 
The spire of this large shell is much de- 
pressed: the band rough and prominent. 

b. 804, Ledbury; a. 854, 
regular natica-like growth, 
a. 851, a. 855, mouth, a. 
852, narrow var., i.e. slow- 
growing spire, a. 853, quick- 
er growth, a. 856, Dudley, 
F.C. 
b. 803, Dudley, F.C. 
a.625, Tortworth (Earl Du- 
cie); a. 626, Dudley, F.C. 
b. 801, Dudley, F.C. 
b. 802, Dudley, F. C. 
a. 846, Dudley, F.C. 
a. 847, Dudley, F.C. 
a. 851, Dudley, F.C. 
a.856, Dudley, F.C. (?? Lower 
Ludlow) ; 
there. 
it is common 
a. 857, good figured speci- 
men, Dudley, F. C. 
