308 
NAUTILOIDEA. 
Horizon. Calschiste de Tournai (Assise i. e) ; = Carboniferous 
Limestone. 
Localities. Tournai, Vise, Belgium. 
Well represented in the Collection. 
Cyrtoceras (Meloceras) Verneuilianum, de Koninck, sp. 
1843. Orthoceras Verneuilianus, de Koninck, Precis 416ment. de g^ologie 
par J. J. d’Omalius, p. 515. 
1844. Cyrtoceras Verneuilianum, de Koninck, Descrip, des Anim. 
Fossiles de la Belgique, p. 625, pi. xliv. f. 7, pi. xlviii. ff. 6 a, c 
(excl. f. 6 6). 
1849. Aploceras Verneuilianum^ d’Orbigny, Prodr. de Pal^ont. Stratigr. 
vol. i. p. 112. 
1852. Cyrtoceras Verneuilianum, Giebel, Fauna der Yorwelt, Band iii. 
Abth. i. p. 202. 
1880. Cyrtoceras Verneuilianum^ de Koninck, Faune du Calc. Car- 
bonifere de la Belgique, p. 35, pi. xxxiv. ff. 9, 9 a-c. 
8p. Char. Shell slightly and uniformly curved. Transverse 
section circular in the young shell, but becoming elliptical in the 
adult, the ratio of the two diameters being then as 13:16. The 
septa are rather deeply concave, and the later ones are distant 
from each other about 2| lines. The siphuncle is situated near the 
convex border ; its elements are nummuloidal. The surface of the 
test is ornamented with very fine, close-set, regular, longitudinal 
lines, which can only be seen with the aid of a lens, some 25 or 26 
of them being included in the space of 2^ lines. 
RemarTcs. The species nearest to this is M. Antiloj)e., de Kon., sp. 
(loe. cit. p. 36), but the latter has a smaller siphuncle, closer septa, 
and much coarser, though similar ornaments. 
Horizon. Calschiste de Tournai (Assise i. e) ; = Carboniferous 
Limestone. 
Locality. Tournai, Belgium. 
Bepresented in the Collection by a single example. 
Cyrtoceras (Meloceras) rugosum, Fleming, sp. 
1815. Orthocera rugosa, Fleming, Thomson’s Annals of Philosophy, 
vol. V. p. 203, pi. xxxi. f. 9. 
1828. Orthocera I'ugosa, Fleming, Hist, of British Anim. p. 239. 
1836. Orthoceras rugosum, Phillips, Geol. of Yorkshire, pt. ii. p. 239, 
pi. xxi. f. 16. 
1854. Orthoceras rugosum, Morris, Cat. of British Foss. p. 311. 
1855. Orthoceras {Cycloceras) rugosum^ M^Coy, British Pal. Foss, 
fasc. iii. p. 573. 
