128 CAUBONIFEROUS CORALS AND BRACHIOPODS 
Spirifer bisulcatus, Sow. 
A single specimen illustrates the normal tjrpe with coarse 
ribbing (cf. PL 6, Fig. 15, Dav.). It is labelled ‘‘ Lower 
Limestone.” 
Spirifer crassus (?), de Kon. 
A large specimen, with a short hinge line, and* ribbing 
somewhat of the type of Fig. 20,P1. 6, Dav., but with a more 
produced fold, may perhaps belong here, though it differs 
very considerably from the figure and description given by 
De Koninck (PL 15 bis. Fig. 5, Garb. Foss, of Belgium). 
Spirifer pinguis. Sow., is represented by a single small 
specimen from Clifton. 
Spirifer ovalis (?), PhilL, is doubtfully represented by a 
partially exposed ventral valve which shows broad, indis- 
tinct, rounded ribs. The only interest of this specimen is 
that it is derived from the uppermost beds (“ N. end of 
Colonnade, Hotv/ells ”). 
Syringothyris : 
Syringothyris cuspidata, Martin. 
Large typical specimens from the Black Bock Quarry^ 
cf. PL 8, figs. 21 and 24, Dav., are represented in the collec- 
tion. One specimen, in which the shell is partially removed 
from the mesial fold, exhibits characteristic deep grooves, 
corresponding to internal septa. 
Martinia : 
Martinia glabra, Martin. 
A specimen from the “ Lower Carboniferous, Clifton,” 
agrees with PL 11, fig. 3 Dav., whilst suggesting the type 
of ribbing shown in PL 12, fig. 3, Dav. 
Reticularia : 
Reticularia lineata, Martin. 
A broad, flattened, reticulated specimen, labelled Aihyris 
