BIVALVIA. 41 
are the following: Z. Hlea, D’Orb., from the Supraliasic Sands; Z. Hectra, D’Orb., 
from the Supraliasic Sands and the Inferior Oolite; Z. Wector, D’Orb., Inferior Oolite ; 
L. Luciensis, D’Orb., Great Oolite; Z. rudis, Sow., Coralline Oolite; Z. rotundata, 
Buv., Coralline Oolite; Z. augusta, Buy., Coralline Oolite. 
Lima Punctatitia, Zyc. Tab. XL, fig. 32. 
Lima PUNCTATILLA, Zyc. Ann. and Mag. Nat. Hist., 1853, p. 420. 
Testa parva, inflata, ovato-oblonga, auriculis parvis subaequalibis, lateribus leviter 
eacavatis ; costis radiantibus (circa 24) elevatis, granulatis, interstiis angustis, striis con- 
centricis crebris decussatis. 
Shell small, inflated, ovately oblong; auricles small and nearly equal, the sides of the 
valves steep and slightly excavated ; radiating (costa about 24), elevated, granulated ; large 
upon the centre of the valves, and degenerating upon the sides into lines, decussated by 
closely arranged concentric striations. 
The general figure resembles Zima gibbosa, but more convex, and with radiating lines 
or delicate costee upon the sides, which increase in size symmetrically towards the middle 
of the valve, each rib being ornamented with a minute line of granules. The specimen 
figured is of less dimensions than others, but it has only occurred very rarely. 
Geological Position and Locality. The Great Oolite of Minchinhampton ; the Inferior 
Oolite of Leckhampton Hill, in the shelly freestone. 
Lima Hetverica, Oppel. Tab. XXXIII, figs. 8, 8 a. 
- Lima erpposa, Goldfuss. Pet., t. 102, fig. 10, p. 86, non Sow. 
— Hetverica, Oppel. Juraformation, p. 489. 
Lima testa fornicata ovata subobliqua antice declivi, costis (25—27) subacutis adpressis 
et linea laterali notatis, sulcis conformibus, lunala levi conveva. (Goldfuss.) 
Shell ovately ob¥ng, convex, slightly oblique; anterior slope lengthened, steep; pos- 
terior slope more gradual and flattened; umbones acute, straight; anterior and posterior 
auricles equal and but little produced, forming a short horizontal hinge-line ; radiating 
costee upon the middle portion of the valves narrow, sub-acute, 25—27 in number at the 
lower border, 14—15 near to the umbo, the additional costz near to the lower border 
consisting of smaller intervening coste or lines, unequal in size, and rather irregularly 
arranged; the larger costa towards the sides of the valves appear as if compressed upon 
the shell. The anterior sides of the valves are nearly smooth, but each side has a few 
very delicate radiating lines; the entire surface of the valves has very delicate, closely 
arranged, concentric, irregular striations, which impress the coste, and are very con- 
spicuous upon the wide, flattened intercostal spaces; the valves are close fitting and thin. 
6 
