176 SATJKOPTERYGIA. 



Tlie following specimens are from the Lower Chalk. 



47259. The imperfect crown of a large tooth in matrix ; from 

 Dover. Gardner Collection. Purchased, 1876. 



47259 a. The crown of a smaller tooth in matrix; from Dover. 



Gardner Collection. 



46959. The crown of a comparatively small tooth in matrix ; from 

 Burham. Purchased, 1876. 



R. 1271. Two associated small teeth in matrix ; from Folkestone, 

 Kent. These are typical examples. Harford Collection. 



The following specimens are from the Cambridge Greensand, and 

 may be regarded as typical examples. 



R. 482. The imperfect crown of a very large tooth. The ridges 

 are comparatively closely approximated. 



Presented by Sir E. Owen, K.C.B., 1884. 



E. 393. The imperfect crown of an equally large tooth. Many of 

 the ridges show the pustules on the summit. 



Presented by A. Nesbitt, Esq., 1883. 



35380. The crown and part of the root of a large tooth. A 

 considerable portion of the enamel has been chipped off. 



Purchased, 1860. 



39104. The imperfect crown and part of the root of a very similar 

 tooth. Bowerbank Collection. Purchased, 1865. 



35257. The imperfect crown of a large tooth wanting much of the 

 enamel. Purchased, 1859. 



35256. The crown of a rather smaller tooth. Purchased, 1859. 



35379. A nearly entire tooth of smaller size. Figured in woodcut, 

 {Fig.) fig. 58 (p. 173). Purchased, 1860. 



30253. The imperfect crown of a tooth. Purchased, 1855. 



35269. Part of the crown of a tooth. Purchased, 1859. 



35270. The crown of a tooth remarkable for its shortness, and 



probably belonging to the posterior extremity of the jaw. 

 The summit is wanting. Purchased, 1859. 



35271. The crown of a very similar tooth. The summit of the crown 



seems to have been abraded by wear. Purchased, 1859. 



