PLATE XXIX. 



AcANTHONAUTiLus BispiNosus, A. H. Foord,. 



Fig. 1. Lateral view of the same individual as tluit figured on PI, XXYIII, 

 showing the umbilical cavity with its thick rim and the broken stump of the 

 spine. (Page 118.) 



PhACOOKRAS ? RKCTISCTTUKALE, sp. nOV. 



Fig. 2a. Lateral view (cast) of the only individual known, showing the 



remarkably straight sutures and part of the body-chamber. 2 h. Peripheral 



view. 2 c. Front view, showing the angular border and steep walls of the 



umbilicus. County of Kildare (?). Public Museum, Belfast. (Page 111.) 



