ENDOCERATID^. 
129 
Family ENDOCERATIDJE. 
Genus ENDOCERAS, HaH’. 
F [ Vaginati, Quenstedt, 1836 ^ ; Sannionites ?, Fisclier, 1837 emend. 
Elyatt, 1883 Cameroceras, Diplocei'as, Conrad, 1839®; Thoracoceras, 
Fisclier, 1841 ® (pars) ; Xothoceras, Eichvrald, 1860 ^ (not of Barrande) ; 
Ortlioceres Longicones — Groups 19-20, Barrande, 1874 
Fig. 10. Fig. 11. 
Fig. 10. Fragment of an Endoceras, with internal cast of siplnmcle, showing at 
I, I, tongue-like lobes formed by the inwrapping septa ; a, a, annulations ; 
s, s, septa. 
Fig. 11. A few septa taken from a polished section of Endoceras Wahlenhergi, 
to show the overlapping necks, n, n ; s, 5, septa ; sc, siphujicular cavity. 
From the Ordovician of Sweden. Drawn from specimens in the National 
Collection. Both nat. size. 
Gen. Chcifr. Shell straight, elongate-conical, circular or elliptical 
in cross-section. Septa rather approximate ; horizontal, somewhat 
’ Palaeontology of New York, vol. i. 1847, p. 58. 
^ De notis Nautilearum primariis. 
® Oryctogr. de Moscou, p. 125. 
^ Proc. Boston Soc. Nat. Hist. vol. xxii. p. 266. 
® Journ. Acad. Nat. Sci. Philadelphia, vol. viii. p. 267. 
® Bull. Soc. Imp. des Nat. de Moscou, tom. xvii. no. 3, p. 755. 
’’ Lethaea Rossica, vol. i. p. 1193. 
” Syst. Sil. de la Boheme, vol. ii. Texte iii. p. 668. 
K 
