254 
NAUTILOIDEA. 
Fig. 44. 
Glossoceras c/racile, var. cnrta. — a, lateral view of cast of a specimen, sho^ving 
the lobed aperture ajy ; h, convex side of the same ; c, concave side of the 
same, showing the septal sutures and the outline of the aperture ; d, lateral 
view of the same individual, the opposite side to a ; c, transverse section 
of another specimen, taken at about middength, the shaded part represents 
the body-chamber ; f, aperture of the same specimen, showing tlie tongue- 
like lobe ,* g, view of the posterior extremity, showing the siphuncle. 
Glossoceras gracile^ Barrande. 
1867. Glossoceras graciJe, Barrande, Syst. Sil. de la Boheme, vol. ii. pt. i. 
p. 373, pi. xciy. ff. 1-19. 
1877. Glossoceras gracile, Barrande, ibid. vol. ii. Suppl. et Serie tardive, 
p. 241, pi. cccclxxvii. Case iii., pi. dxiii. £E. 10-13. 
Char. The general form of the shell is slender, the transverse 
section is oval ; the body-chamber more or less strongly convex, 
while the septate border is nearly straight or but slightly concave. 
The anterior portion of the shell is prolonged into a short, cylindrical 
neck which bends a little towards the convex border. The dorsal 
side of the aperture (hg. 44, a) is produced into a tongue-shaped 
lobe, while the ventral side forms a shallow sinus (fig. 44, h ) ; 
between these there are two smaller lobes (fig. 44, a, d). The 
whole of the visceral cavity is greatly contracted, and generally 
occupies less than half the width of the shell. The number of 
