PLESIOSATJEID^. 177 



39104 a. The crown of a comparatively large tooth, remarkable 

 for its great length. Bowerbanh Collection. 



35259. The root and base of the crown of a medium-sized tooth. 



The base of the crown has been absorbed by a successional 

 tooth-germ. Purchased, 1859. 



35382. The crown of a medium-sized tooth. Purchased, 1860. 



35260. The crown of a large tooth wanting most of the enamel. 



Purchased, 1859. 



35258. The crown and part of the root of a rather smaller tooth. 

 The crown is comparatively short, and has the ridges on 

 the convex surface widely separated. Purchased, 1859. 



35262. The crown of a medium-sized tooth. Purchased, 1859. 



30253. The crown of a very similar tooth wanting portions of tho 

 enamel. Purchased, 1855. 



35261. The perfect crown of a tooth noticeable for its elongated 



shape. Purchased, 1859. 



41913. The crown of a larger tooth. Purchased, 1870. 



35263. The imperfect crown of a tooth resembling No. 35261. 



Purchased, 1859. 



35264. The imperfect crown of a small tooth. Purchased, 1859. 



35265. The crown of a rather larger tooth. Purchased, 1859. 



35266. The crown of a very similar but straighter tooth. The 



ridges near the summit are very few. Purchased, 1859. 



35267. The crown of a stouter tooth. Purchased, 1860. 



35381. The crown of a very similar tooth. Purchased, 1860. 



41913 a. The greater part of a small tooth. Purchased, 1870. 



40357. Six specimens of the crowns of medium-sized teeth, to one 

 of which a portion of the root is still attached. 



Purchased, 1867. 



R. 1268. The crown of a large tooth. Harford Collection. 



R. 1269. The imperfect crown of a very large tooth, with one 

 surface worn by the attrition of another tooth. 



Harford Collection. 



R. 1270. The crown of a smaller tooth. Harford Collection. 



PAKT II. n 



