Fig. 17, 24. OKTHOCERA costata. 
OnTHOCEnA costata, Fleming in Edin, Ency. vii, p. 86. 
Nautilus costatus, Mont. Test. Brit. p. 199, pi. 14, fig. 5. 
Fig. 21, 23. ORTHOCERA legumen, 
Oktiioc-era legumen, Fleming in Edin. Enci/. vii. p. 8G. 
Nautilus legumen, Mont. Test. Brit. Sup. p. 82, pi. 19, fig. 6. 
Fig. 26. ORTHOCERA spinulosa. 
Orthoceka spinulosa, Fleming in Edin. Ency. vii p. 86. 
Nautilus spinulosus, Mont. Test. Brit. Sup. p. 06, pi. 19. fig. 5. 
Fig. 14, 15. ORTHOCERA linearis. 
Orthoceka linearis, Fleming in Edin. Ency. vii. p. 86. 
Nautilus linearis, Mont. Test. Brit. Sup. p. 87, pi. 30, fig. 9. 
Fig. 22. SPIROLINA similitua. 
Spirolina similitua, Fleming in Edin, Ency. vii. p. 86. 
Nautilus similituus, Mont. Test. Brit, p. 196, pi. 19, fig. 3. 
