100 
JURASSIC, OR 
on a front view, shows our shell to belong to the group of the 
T. resupinata and T. carinata, so common in the Oolites. 
But I cannot identify it certainly with any, and I should be 
as sorry to describe a new species of Terebratula , as to invent 
a new tax. I think it is nearer to T. resupinata than any 
other, or perhaps to T. Moorei, from its very convex upper 
valve. But the depressed marginal sinus is unlike either, 
and more resembles that of T. emarginata. T. carinata is 
nearest in external form to our shell, the beak of which, how¬ 
ever, is much less carinate on the sides : its upper valve con¬ 
vex and unfurrowed to the very margin, which is not quite the 
case even in T. carinata. But the shape is more rounded, and 
in this particular it comes nearer the T. Moorei , Davidson. 
TEREBRATULA GLOBATA—Sow. 
Plate 21, fig. 6. 
Mineral Conchology, 1825, pi. 436, f. 1. Terebr. Klcinii, Morris, 
Deshayes. D’Orb. Bronn, (not of Lamarck). Davidson Monogr. 
1. c. pi, 13, f. 2-7. 
Our specimens have the plait on the front, just a little more 
pronounced than in British examples, and the back a little 
more carinate. I can see no differences of importance, and 
Mr. Etheridge agrees with me. 
RHYNCHONELLA CONCINNA.-&W. 
Plate 21, fig. 8. 
Terebratula, Mineral Conch. 1812, vol. i., t. 88, f. 6. Von Buch, 
Morris, Bronn, &c. Rhynchonclla, D’Orbigny; Davidson in Monogr. 
1. c. t. 17, f. 6-12. 
This common species in the Great Oolite and Bradford 
clay varies much, but is not often quite so large as the 
Himalayan forms. The species appears, from what I saw in 
the Oxford Collection, to be equally common in the Spiti Pass, 
