LINGULID A. 53 
Obs. One specimen in the Cambridge Museum, from the “ Calcareous [ Lower] Bala 
flags of Wellfield, Builth,”’ was described and identified by Prof. M‘Coy with the American 
ZL. curta of Conrad. I have again, thanks to Mr. H. Seeley, been able to figure the spe- 
cimen so described by Prof. M‘Coy. It certainly agrees pretty well with Prof. Hall’s 
figure and description ; but from a single specimen I would not venture to assert the 
British shell to be specifically the same as that from the Utica slate and Trenton limestone 
of Middleville and East Canada Creek, or of Carlisle (Pa.), N. America. 
The identification of this and the preceding two species is, therefore, here given solely 
on Prof. M‘Coy’s authority. Mr. Salter is of opinion that this is the young of the common 
Llandeilo-flag fossil, Z. attenuata, Sow. 
(?) Lineuna prema@a, Salter. PI. II, fig. 8. 
LInGULA pYGMMaA, Salter, Quarterly Journal Geol. Soc., vol. xxi, p. 101, 1865. 
Spec. Char. Shell minute, thin, subcylindrical, gibbous ; beak somewhat obtuse ; 
anterior margin truncate ; surface finely striated transversely. 
Length 3th, width 3th inch. (Salter.) 
Obs. Not having myself seen a specimen of this minute shell, I must be content 
with reproducing Mr. Salter’s description and figure. Dr. Hall informs me that Z. 
pygmea was obtained from the black shales, which correspond with the uppermost 
division of the Lingula-flag formation. 
Locality. Malvern Hills. 
Lineuua (?) Satrrri, Dav. PI. I, figs. 27—29. 
Spec. Char. Longitudinally oval or ovate, widest anteriorly or at about the middle, 
the sides and front forming a regular curve or half circle, which continues, but with less 
convexity, to the extremity of the beaks, the junctions of the slopes at the beaks forming 
an obtuse angle ; valves moderately convex, most so at a little distance from the extremity 
of the beaks ; surface marked with concentric lines of growth, more deeply indented at 
intervals. Two specimeus measured— 
Length 24, width 22 lines. 
One a LS: |, 
Obs. Whether this shell be a Lingala or an Obolus is a question which the material 
at my command will not enable me correctly to determine, for none of the specimens 
showed any portions of their interior. It much resembles Lingua exilis, Hall (‘ Thirteenth 
Annual Report of the Regents on the State Cabinet, p. 76, New York, 1860), a shell 
occurring in the Hamilton group and Marcellus shale of Bridgewater, New York. 
