TTie originals of the following series of casts (purchased^ 1883) were 

 obtained from the Antwerp Crag^ and are preserved in the Royal 

 Museum of Natural History, Brussels ; the majority are figured 

 by Van Beneden in the ''Ann. Mus. R. Hist. Nat. Belg.' vol. iv. 

 pt, 2, pis. xxiii.-xxxix., to luhich memoir the following refer- 

 ences cipply. 



M. 1287-8. Casts of the associated right tympanic and periotic ; 

 pi. xxvi. figs. 1-6. 



M. 1286. Cast of the left tympanic ; pi. xxvi. figs. 7-11. 



M. 1285. Cast of the right tympanic ; pi. xxvi. figs. 12-15. This 

 specimen is shorter and broader anteriorly than M. 1286. 



M. 1291. Cast of the right frontal ; pi. xxvii. fig. 1. 



M. 1292. Cast of the atlas vertebra ; pi. xxix. 



M. 1311. Cast of the atlas vertebra ; pi. xxxi. fig. 1. 



M. 1322. Cast of the imperfect atlas vertebra of an older individual ; 

 pi. xxxi. fig. 2. 



M. 1297. Cast of the united second, third, fourth, fifth, and sixth 

 cervical vertebrae ; pi. xxxi. fig. 3. 



M. 1323. Cast of the axis vertebra ; pi. xxx. fig. 1. 



M. 1312. Casts of three conjoint cervical vertebra© ; pi. xxxii. 

 figs. 1, 2. 



M. 1310. Cast of one half of the united cervical vertebree ; pi. xxxii. 

 figs. 4, 5. 



M. 1298. Cast of one half of the united first six cervical vertebrae ; 

 pi. xxxii. fig. 6. 



M. 1295. Cast of one half of the united axis and four following 

 cervical vertebras ; pi. xxxiii. fig. 1. 



M. 1294. Cast of one half of the united axis and two following 

 cervical vertebrae ; pi. xx^in- fig- 3. 



M. 1313. Cast of the sixth cervical vertebra of the same individual ; 

 pi. xxxiii. figs. 4, 5. 



M. 1293. Cast of the united first six cJ^rvical vertebrae ; pi. xxxi. 

 fig. 4, pi. xxxiii. fig. 6, and pi. xxxiv. fig. ] . 



M. 1314. Cast of the centrum of the seventh cervical vertebra 

 pi. xxxiv. figs. 3, 4. 



