196 TRANSAC. OF THE ACAD. OF SCIENCE. 
Murcuisonia supancuLaTa (?), Verneuil, Ge. Rus, p. 
340, pl. xxm1,, fig. 6 
Our specimens are very imperfect, but they resemble this 
more than any other species. 
From the Cellular Limestone of the Upper Permian strata, 
Loxonema rasctata, King, Per. Fos., pl. xv1., fig. 30, p. 209. 
Lower Permian strata, K. T. 
Wickoonen.vs spiratus, McCoy, Brit. Pal. Fos., p. 549, 
pl. 8HL, figs. 1-2, 
Iam unable to see any specific distinctions between our 
specimens from the Lower Permian and that described and 
i by McCoy, from the Carboniferous Limestone in 
umberland. 
ss CEPHALOPODA. 
Navmvs PeRmanvs, Swallow. 
, Shell of sas _Size, discoidal; spire formed of two or 
ig sub-hexagonal volutions; dorsal mar- 
