34 
Class — PTEROPODA. 
Section — THECOSOMATA. 
CONULARIA, 3Iiller. 
CoNULARiA SowERBYi {?), Defrancc. 
Cunularia Sowerhyi^ Defrance, 1828, De Blainville, Man. Make., p. 377, pi. 14, fig. 2. 
,, quadrisulcafa, J. de C. Sowerbv, 1839, in Murchison’s Silurian System, p. 026, 
pi. 12, fig. 12. 
,, Sowerhyi, De Verneuil, 1845, Eussia and Ural Mts., II, p. 348, pi. 24, fig. 5. 
,, Salter, 1859, in Murchison’s Siluria, p. 550, pi. 25, fig. 10. 
As I liave but a small piece of the shell now before us, it is impossible 
to say positively that it belongs to this species. I liave, however, some reason 
for believing it so from the two reasons that, on the one hand, the ornamenta- 
tion is very similar to that figured by Sowerby, and, on the other, that the 
specimen was collected from the rock that contains Encrinurns Earrandei, 
L. G. de Koninck, Airy pa hemisphcerica, Sowerby, Eetzia Salteri, Davidson, 
all species which in England are found with Comilaria Sowerhyi, which in 
its turn might very fitly be associated with the same species in Australia. 
Horizon and Localities. — As ^the result of previous observations, the 
specimen of Comilaria found at Rock Elat. Creek is found in Silurian beds of 
the same age as the Upper Llandovery ; E. de Verneuil has collected Comilaria 
Sowerhyi at Chotim, in Bessarabia, on the banks of the Dneistcr. 
CEPHALOPODA. 
Orr/cr— TETKABEAECHIATA. 
Genus — ORTHOOERAS, Breyn, 
Oethoceras ibex, J. de C. Sowerhy. 
OrlllOCeras ihex, J. de C. Sowerby, 1839, in Murcliison’s Silurian System, p. 013, pi. 5, fig. 
30 {non Phillips). 
,, articulatuni, Idem, Ibid., p. 013, pi. 5, fig. 31. 
,, ihex, Salter, 1859, in Murchison’s Siluria, p. 551, pi. 29, fig. 3-4. 
Shell very long, diameter increasing slightly during its growth ; trans- 
verse section elliptic. Septa oblique, fairly numerous ; to each septum 
