LOWER LUDLOW GROUP. 

Case and 
Column of 
Drawers. 
Get 
Ge8 
Ge8 
Ge‘ 
Get 
Ges 
Reference to McCoy’s 
Synopsis: and Figures of Genera. 

p. 314, 
do. 
Cycloceras, p. 319. 
PL. 11, fig. 31, p. 320. 
Cycloceras. 
p. 313. 
p. 817. 
FHortolus Ibex, p. 324. 
Tntuites articulatus, p. 323. 
Names and References; Observations, &e. 
Numbers and Localities. 

HETEROPODA. 
Bellerophon, n. sp. More prominent 
keel than B. dilatatus. 
Cyrtolites levis, Sow. sp. (Silur. Syst. 
t. 8, fig. 21). 
CEPHALOPODA. 
Orthoceras filosum, Sow. (Siluria, 2nd 
ed. Foss. 61, pl. 27, fig.1). Large and 
small threads or thin ridges. 
Orthoceras dimidiatum, Sow., var. with 
distant ribs or plications, which 
occur only half across the shell— 
ventral or dorsal aspect, but we 
know not which. 
Orthoceras Ibex, Sow. (Siluria, 3rd ed. 
pl. 29, figs. 3, 4), 
Orthoceras tenui-annulatum, McCoy. 
Surely a variety of O. Ibex. Ithas 
only fine striz. 
Orthoceras, sp. like Ibex, but much 
larger. See Sabella in the annelid 
drawer. 
Orthoceras angulatum, Wahl. (Siluria, 
2nd ed. pl. 28, fig. 4). Has a set 
of parallel lines between the ribs. 
Orthoceras subundulatum, Portl. (Geol. 
Report, t. 28, fig. 2). 
Orthoceras subundulatum? Portl. 
Orthoceras perelegans, Salt. (Mem. 
Geol. Surv. Vol. 1m. pt. 1, pl. 13, 
figs. 2—4, p. 354). 


b. 927, Dudley, F. C. 
b. 986, Dudley, F. C. 
b. 928, Garden Quarry, Ay- 
mestry. 
a. 928, Leintwardine. 
b. 929, Dudley, F. C. 
a. 992, Green Quarry, 
Leintwardine; a. 995, near 
Aymestry. 
a. 983, Dudley, F. C. 
a. 984, Dudley (striz good), 
F.C. 
b. 930, Garden Quarry, Ay- 
mestry. 
b. 931, Clungunford. 
b. 932, Garden Quarry, 
Aymestry; b. 933, High 
Thorns, Underbarrow. 
