ANIMALS. 17 
Order SticHostEeta, D’Orbigny. 
Genus Dentalina, D’Orb. 
Generic characters.—Shell elongate, conical, equilateral, slightly curved; formed of 
a series of chambers, more or less globose, arranged end to end, on a single axis. 
Aperture small, round, on apex of the last chamber. 
No. ]. DENTALINA PERMIANA, 706. ‘Tab. VI, fig. 1. 
Length, an 
Thickness, =45 
Shell formed of about nine smooth, oval cells. The early cells subglobose, the 
later cells longer than broad. Last cell somewhat beaked. Sutures shallow. 
Not rare, both in the young and adult state, at Byers’ Quarry. 
Several species of Dentalina approach this form, especially D. elegans, D’Orb. 
(tertiary), Foram. foss. Vienne, p. 45, n. 21, tab. i, figs. 52-6, and D. gracilis, D’Orb. 
(cretaceous), Mém. Soc. Géol. France, tom. iv, 1" partie, p. 14, n. 4, tab. i, fig. 5. 
No. 2. DENTALINA Kine@I1, 206. Tab. VI, figs. 2, 3. 
INCH. 
Length, 35 
Thickness, =35 
Shell formed of about eight globose cells, each bearmg ten to twelve ribs. Sutures 
excavated. 
Of frequent occurrence, at Byers’ Quarry. 
D. Kingit is very similar to D. multicostata, D’Orb. (cretaceous), Mém. Soc. Géol. 
France, tom. iv, 1 partie, p. 15, n. 8, tab. i, figs. 14, 15; which latter, however, has 
more than double the number of ribs. This form is closely allied to that of 
Nodosaria sulcata, Nilss. (cretaceous), WVod. elegans, Miinst. (tertiary), Nautilus obliquus, 
Gualt. (recent), JV. jugosus, Montag. (recent), and od. Rapa, D’Orb. (recent). 
No. 3. DENTALINA (?) Tab. VI, fig. 4. 
Length, a0 
Thickness, 45 
Crystalline and transparent cast of shell formed of two oval, oblique cells ; last 
cell beaked; each cell marked with a diagonal fold, as if it were a tube bent on 
itself. 
We have met with three instances of this anomalous fossil, in the same locality as 
the last. 
