PLATE LXXIII. 
Goniatites Oweni, var. parallela. 
Page 473. 
See Plate 74. 
Fig’. 1. Lateral view of a specimen, showing the directions of the sutures and the size of the umbilicus. 
Fig. 2. Ventral view of the same individual, showing the approximation of the septal lines on each side of 
the ventrum, forming two parallel grooves in the cast. Goniatite limestone. Rockford, Ind. 
Goniatites Oweni. 
Page 470. 
See Plate 74. 
Fig. 3. Lateral view of a specimen of medium size, showing the directions of the sutures and the wide 
umbilicus. 
Fig. 4. Ventral view of the same, showing features contrasting with those of fig. 2. 
Figs. 5, 6. Lateral views of two young individuals. It is possible that fig. 5 may be the young of the 
variety, but it is difficult to determine from such immature examples. 
Figs. 7, 8. Two larger individuals preserving no traces of septa, and showing the constriction of the tube at 
irregular intervals. Goniatite limestone. Rockford, Indiana. 
Goniatites Lyoni. 
Page 476. 
See Plates 72, 74. 
Fig. 9. Lateral view of an imperfect specimen restored in part, and showing the gradually enlarging volu¬ 
tions and the sinuosities of the septal margins. 
Fig. 10. A portion of a larger individual preserving the base of the outer chamber. The lobes and saddles 
of the septa are very imperfectly represented in the two preceding figures. The specimens 
show the apex of each lobe to be tipped with a small mucronate extension. 
Fig. 11. Ventral view of a fragment, showing the deep acute lobe of the septa on the ventrum. Goniatite 
limestone. Rockford, Indiana. 
Goniatites Ixion. 
Page 474. 
See Plate 74. 
Lateral view of a young individual, showing a more rotund form than in the larger specimens. 
Lateral view of a large individual, showing septal lines throughout, and the very small umbilical 
depression. 
Front profile view of the same individual, showing the form of the transverse section, the size of 
the siph uncle, and the mucronate extension of the ventral lobe. Goniatite limestone. Rock¬ 
ford, Indiana. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
