108 
IJUhLKriX OF THK NATUKAL llKSrui{V SOCIKTV. 
and the whole interior, especially towards the umbo, is marked with 
scattered pits. 
Sc(i/ptn7'f\- K.xternally this shell has fine concentric ridges, which 
aie crossed by very fine radiating stria'. The middle third is marked 
by numerous fine radiating vascular lines, and the lateral borders are 
flattened at the sides. 
Size . — Length 101> mm. ; width 9 mm. Infrequent. 
LlN(iULELLA cf. LEPIS. 
Another Lingulella, a smaller species, occurs with preceding. It 
has a similar but proportionately coarser concentric striation ; between 
the ridges it is marked with a fine granulation ; the outline is more 
regularly rounded than that of the preceding species. It appears to 
agree with Salter’s species as regards the form and striation, though 
it is smaller, being only half the length. The interior markings are 
not known. 
Size. — Length, G mm.; width, 5 mm. 
MoniOLOPsis (?) cf. SoLVEXSis, Hicks. 
Long-ovate, elevated tONvard the umbo and carrying its fullness 
towards the lower posterior end of the valves. 
The umbo is ^near the anterior end, and there is a small, trans- 
versely elongated scar just in front of it. 
Sculpture . — The bad condition of the surface leaves this doubtful 
for most of the surface, but there are faint concentric striations 
toward the lower margin and the posterior end. Only two examples 
known. 
Size . — Length mm. ; width ’2h mm. 
This species resembles that above cited, but lacks the strong ridge 
extending backward from the umbo. It is also only half of its length. 
Hellerophox ixsul.e, n. sp. PI. XVIII, fig. 3. 
A small thin species, having about three whorls, of which outer is 
enlarged and more than twice the height of the others ; it is emarginate 
