78 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Dec. 8, 
specifically with any of the described species, as its external surface 
is not known. 
7. Disctna? Enertit, n.sp. Pl. IV. fig. 8. 
I am uncertain as to the genus to which this shell should be 
referred ; in external shape it looks like an Obolus, being almost cir-. 
cular, much depressed, andsmooth. Length 8, breadth 9 lines. As. 
it was found alone, it is impossible to determine to what formation 
it should be referred. ‘Two specimens were obtained by Mr. Vicary. 
8. CRANIA TRANSVERSA, n. sp. Pl. IV. figs. 9 & 10. 
Transversely oblong-oval, widest anteriorly ; upper valve mode- 
rately convex, vertex about one-third of the length of the shell from 
the posterior margin ; surface smooth or marked by concentric lines 
of growth. Length 6, width 7 lines. Of this shell Mr. Vicary has 
found two examples. Exteriorly it resembles more than one Deyo- 
nian as well as Carboniferous species. The interior not having been 
found, it cannot be critically described ; but for the sake of reference 
I have applied to it the provisional name of transversa. It is in all 
probability a Devonian shell. 
9. TrrEBRATULA ?, sp. PI. IV. fig. 11. 
Of this shell a single valve has been found by Mr. Vicary in a 
pebble containing impressions of an Orthis Vicaryi. It bears some 
resemblance to 7’. inequalis, F. A. Roemer (Beitr. zur Kenntniss des 
nordwestlichen Harzgebirge, pl. iii. fig. 3), a form belonging to the 
Silurian Spirifer-sandstone; but it would not be safe to identify 
our English valve with any of the described species of that genus, 
nor am I perfectly certain that it 1s referable to the genus Tere- 
bratula. It is longitudinally oval, broadest and rounded anteriorly, 
more converging posteriorly, convex, and smooth. Length 8, width 
4 lines. 
10. Sprrtrera Vernevitit, Murch. Pl. LY. figs. 19 & 20. 
Bull. Soc. Géol. de France, vol. xi. p. 252, pl. xi. fig. 3 (6th April, 
1840)=S8S. Archiac (Murch.); also Day. Dev. Mon. p. 23, pl. v. 
figs. 1-12, pl. vi. fig. 16 =S. disjuncta, Sow.=S. antiquissimus 
and S. Davidis, Salter, Quart. Journ. Geol. Soc. vol. xx. pp. 295, 
296, pl. xvi. figs. 10-13. 
This is one of the commonest fossils found in the Budleigh peb- 
bles, and is identical in shape with those Upper-Devonian specimens 
which occur so abundantly at Ferques, near Boulogne-sur-mer, and 
also in Devonshire, Belgium, China, &c. Itis found in company with 
S. macroptera, var. multicostata, Rhynchonella inaurita, Productus 
Vicaryi, &c. It is also the shell to which Mr. Salter applied the 
names of Spirifer antiquissimus and S. Davidis. 
In the description of this Spirifera, Mr. Salter seems very uncertain 
whether it should be considered a Silurian or a Devonian fossil; for 
he writes, ‘To all appearance this is a Spirifer, and I am compelled, 
from the structure of its teeth [dental plates, he should say] to de- 
