ORTHOCERATID^. 
85 
of priority demands that the former name should be reinstated, at 
the expense of the latter. 
Horizon. Orthoceratiten-Schiefer ; Lower Devonian. 
Locality. 5Vissenbach, Xassau. 
One imperfect specimen represents this species in the Collection ; 
it was presented by J. E. Lee, Esq., F.S.A., E.G.S. 
Orthoceras cingulum, Hall. 
1879. Orthoceras cingulum, Hall, Pal. of New York, vol. v. pt. ii. 
p. 240, pi. Ixxvi. If. 2, 3. 
Sp. Char. Shell straight. Section apparently elliptical. Hate of 
increase 1 in 6. Body-chamber too imperfect for its proportions to 
be ascertained. Septa distant about ^ the diameter ; somewhat 
undulating. Siphuncle central, or subcentral, small. “ The ventral 
side is indicated by a longitudinal raised line or carina (normal 
line ?) on the cast of the septate portion. Test and surface markings 
unknown ” {Hall). 
HemarJcs. This species is nearly allied to 0. jiactum, HaU, but, as 
that author remarks, the septa in 0. cingulum are wider apart than 
they are in the latter species, which also wants the keel along the 
ventral side. 
Horizon. Schoharie Grit, Lower Devonian. 
Locality. Schoharie, Xew York State. 
Represented in the Collection by three imperfect specimens trans- 
ferred from the Museum of Practical Geology. 
Orthoceras Vennense Eoord. 
1840. Orthoceras cylindraceum, Sowerby, Trans. Geol. Soc. 2nd series, 
vol. V. p. 703*, and Expl. of Plates, &c. pi. lii. ff. 6, 7. {Not of 
Fleming.) 
1841. Oiihoceras cylindraceum, Phillips, Pal. Foss, of Cornwall, Devon, 
and West Somerset, p. 113, pi. xliii. f. 213, a, b, ? c. {Not of 
Fleming.) 
\_Cf. 1840. Orihoceratites regularis, Miinster, Beitr. z. Petrefactenkunde, 
Heft iii. p. 95, Taf. xvii. ft'. 3, 4.] 
Sp. Char. Shell very elongated; slowly tapering; sometimes a 
little curved. Section circular. Septa rather widely separated, 
1 The name 0. cylindraceum having been employed previously by Fleming 
(Annals of Philosophy, vol. v. 1815, p. 202), I have substituted for it that of 
0. Vennense, after the village of Venn, near Barnstaple (N. Devon), where the 
species was first collected. 
