Plate XII. 



Waltcria leuckartî Ij. 

 Ail figures in 74 ûat. size. 



Fig. 1. A well-preserved specimen which was in possession of Mr. Alan 



Owston. Upper end of the stem broken off. 

 Fig. 2. A 8i)ecimen in the Sei. Coll. Mus. With all the tissues fallen off. 



Upper eud broken. 

 Fig. 3. A well-preserved si)ecimen with the apical end intact. Lower part 



wanting. 



