242 
NAUTILOIDEA. 
BemarTcs. This species is easily distinguished from all others of 
the genus by the peculiar character of the aperture. 
Horizon. Etage E (= Salopian). 
Locality. Hinter Kopanina, Bohemia. 
Bepresented in the Collection by two examples. 
Outline of the aperture of rather a young individual of Hcxameroceras, showhig 
the three pairs of lobes in the larger orifice : m, median saddle ; d, dorsal 
margin ; v, ventral. (After Barrande, loc. cit. pi. 1. f. 13.) 
Gen. Char. In this genus there are three pairs of lobes in the 
larger orifice of the aperture. Its stratigraphical range is confined 
to the epoch of the Silurian. Type, Hexameroceras (Phragm.) 
Panderi^ Barr. 
Hexameroceras Panderi, Barrande, sp. 
1847. Phragmoceras Panderi, Barrande, Haidinger, Berichte fiber die 
Mittheih von Freund, der Naturwiss. in Wien, Band iii. p. 269. 
1867. Phragmoceras PandeVi, Barrande, Syst Sil. de la Boheme, vol. ii. 
pt. i. p. 232, pi. xlviii. ff. 12-15, pi. 1. fi*. 7-15. 
1877. Phragmoceras Panderi, Barrande, ibid. Suppl. et Serie tardive, 
pp. 80 & 236, pi. ccccxxix. fip. 14-20. 
Pt'p. Char. Shell very slightly curved. The dorsal side is strongly 
^ Proc. Boston Soc. Nat. Hist. vol. xxii. 1883, p. 278. 
^ Syst. Sil. de la Boheme, vol ii. pt. i. pp. 203 & 265. 
Genus HEXAMEROCERAS, Hyatt h 
{Hexameres, Hexamorion, Barrande, 1867 “). 
Fig. 38. 
d 
