125 
SPIRIFER striatus. 
TAB. CCLXXI. 
Syn. Conch. Anomites striata, Martin Petr. Derb. 
tab. 23. Terebratula striata, Sowerby 
Linn. Trans. XII. part 2, p. 515, t. 28. 
f. V8 2. 
"Tue small numerous unequal sulci, the wide but not 
deep back and the angular sinus in the front distinguish 
this from every other Spirifer. The back extends the 
whole width of the shell and makes the sides pointed, it 
is slightly striated; the beaks are incurved but not long. 
As Mr. Martin observes, this is common in Derbyshire, 
I have received it also from near Cork, through the kind- 
nes of two or three friends. The only indication I have 
been lucky enough to meet with of the internal structure, 
has been obtained by cutting off one side as shewn in the 
figures. 
SPIRIFER pinquis. 
TAB. CCLXXI. 
Sp. Cuar. Gibbose, transversely obovate, with 
a straight back, longitudinally sulcated, ele- 
vated in the middle ; sulci eight or nine on 
each side, and one in the centre of the elevat- 
ed ridge. 
"Tur canal in the lower valve corresponding to the cen- 
tral elevation in the upper is free from sulci and near the 
