186 
Case and 
Column of 
Drawers. 

Gfé 
Gg 
Gg2 
Gf 
Gf 
Gf 
Gf? 
Gf 
Gf7 
Gf? 
Gf? 
G¢g2 
Gf10 
Gf? 
Gf 
Reference to McCoy’s 
Synopsis: and Figures of Genera. 
SILURIAN. 

Names and References; Observations, &e. 


p. 304, 
p. 309. 

Cycloceras, p. 319. 
p. 313. 


Holopella obsoleta, Sow. (Siluria, 2nd ed. pl. 
34, fig. 11). A fine shell, everywhere cha- 
racteristic of sandy Ludlow rock. 
Platyschisma helicoides, Salter. A shell very 
like the Trochus helicites of the British 
Ludlows, but flatter and having a marked 
subangular band, 
HETEROPODA (Nucleobranchiata). 
Bellerophon expansus, Sow. (Siluria, 2nd ed. 
pl. 25, fig. 8). 
Bellerophon Ruthveni, n.s. Smaller than 
B. dilatatus, and with the band angular, 
and the whorls angular where the band 
becomes so, Very common, 1} inch wide, 
CEPHALOPODA. 
Orthoceras Ibex, Sow. (Siluria, 2nd ed. pl. 29, 
fig. 3). Often shews sudden expansion, pro- 
bably breeding season. 
Orthoceras bullatum, Sow. (Siluria, 2nd ed. 
pl. 29, fig. 1). The septa shew vascular 
markings all over them. 
Orthoceras angulatum, Wahl. (Siluria, 2nd 
ed, pl. 28, fig. 4. See p. 173.) 
Orthoceras subannulatum? Not at all likely. 
Orthoceras Maclareni? Salter (Siluria, 2nd 
ed. Foss. 24, p. 126). 
Orthoceras tenuicinctum, Portl. (Geol. Rep. 
p- 371, t. 27, fig. 5. Siluria, 2nd ed. Foss. 
40, fig. 3), 
Numbers and Localities. 
c. 25, Benson Knott. 
b. 140, c. 26, Lesmahagow. 

c. 27, near Ludlow. 
b. 61, Benson Knott, 
ce. 28, Meal Bank, Kendal; 
b. 58, Benson Knott, good. 
ce. 29, Lambrigg Fell, Ken- 
dal; c. 30, Radnorshire; 
c. 31, Mortimer’s Cross ; 
ec. 32, Burton and Brockton. 
c. 33, Brigsteer, Kendal; 
c. 34, Underbarrow, 
c. 37, Brigsteer. 
b. 137, Lesmahagow, 
b. 153, Brigsteer; c¢. 35, 
Benson Knott, Kendal; c. 
36, Woolhope. 

