Mr. J. Lycett on the Upper Lias of Gloucestershire. 161 
forms of the same species occur in the lower shelly zone of the 
Cynocephala-stage at Nailsworth. The largest specimen in my 
possession has a diameter of 2} inches; the height of the aper- 
ture is 6 lines, the opposite diameter 10 lines. 
A. falcifer. A few specimens. At Stroud, when the railway 
was being constructed, a thin band of pale grey limestone was 
crowded with fine specimens, to the exclusion of all other species. 
A. annulatus, Sow. Few, and ill-preserved. 
A, Lythensis, Y.& B. Smaller forms than occur at Whitby. 
It is not the A. Lythensis of Quenstedt ; the latter is a very 
different Ammonite. 
Belemnites compressus, Voltz. Large specimens in the upper 
bed, associated with B. tripartitus. 
B.tripartitus, Schl., agrees with specimens in the Cynocephala- 
stage at Nailsworth and at Frocester Hill. 
Nautilus latidorsatus, D’Orb. (N. Toarcensis, D’Orb.; N. Ju- 
rensis, Quenst.). A single fine specimen. 
N. sinuatus, Sow. Fragments only. 
Pleurotomaria. Species undetermined, with elevated spire, 
narrow convex yolutions, mesial siphonal rib, and fine, densely 
arranged, equal encircling lines. 
Turbo capitaneus, Miinst. Its aspect agrees with specimens 
from the Cynocephala-stage in the neatness of the ornamen- 
tation. 
Gresslya gregaria, Reem. A large tumid species, well sepa- 
rated from congeneric forms. A single specimen. 
Tancredia leviuscula, n. sp. 
A large elongated species, with an oblique dorsal angle and 
the posterior border nearly closed. Compared with allied forms, 
it is more lengthened and less convex than 7. donaciformis ; the 
anterior extremity is more rounded; the umbo is but little 
elevated, the posterior side being much extended and its extre- 
mity pointed ; the height being only equal to ;°ths of the length. 
It is distinguished by the same features from 7. Deshayesea and 
T. compressa. A single fine specimen. 
Lima gigantea, Sow. This well-known shell occurs both in 
the Lower and Upper Lias of Gloucestershire. D’Orbigny has 
separated the older form under the name of L. edulis. I do not 
perceive that the latter possesses any sufficient specific distinction. 
Lima bellula, Mor. & Lyc. Delicately preserved, and exhi- 
biting the finely ornamented surface, which is rarely seen in 
Inferior Oolite specimens. Some of the latter atta larger 
dimensions and have a somewhat shorter figure, but do not 
possess any other distinguishing feature. 
