PLATE X. 
Fig- 
1-4. 
Page 
Hi/bodies clelabechei, Charles worth ; four associated teeth, 
outer aspect.—L. Lias ; Lyme liegis. [20570.] 
5. 
Ditto ; four hinder series of teeth, coronal aspect: one of 
each of three series also shown in side view («, b, c).— 
Ibid. [F- 2791.] 
261 
6, 7. Hybodus (?) raricostatus , Agassiz ; two associated teeth, 
outer and inner aspects.—Ibid. [P. 2797.] 25S 
8, 9. Hyhodustf) docicinus, Quenstedt; two associated anterior 
teeth, inner and outer aspects.—Ibid. [39785.] 257 
10-14. Ditto; five associated teeth, inner and outer aspects. 
—Ibid. [2196.] 257 
15. Hybodus raricostatus, Agassiz ; two hinder series of teeth 
and portions of a third, coronal aspect; two teeth also 
shown in side view (b, c). —Ibid. [P. 2796.] 258 
16-18. Hybodus reticulatus , Agassiz ; three associated anterior 
teeth, outer aspect.—Ibid. [40335.] 266 
