Plate XIII. 



Tiarechinus princeps Laube. 

 P. 11, (54. 



Fig. 150. The speciinea from the "K. K. Geologische Eeichs-Aiistalt", Vienna, dorsal view: magnified ■•ihont 



nine times. 



Fig. 151. The same, ventral view. 



Fig. 152. The same, showing the plates. 



Fig. 153. The same, side view. 



Fig. 154. The same, showing the plates. 



Fig. 155. The caly.x of the same. 



Fig. 156. One of the sexual? pores. 



Fig. 157. Granulation of the interradia. 



Fig. 158. The adoral part of an aniluilaernm. 



Fig. 159. The aboral part of the same. 



Fig. 160. One of the large tubercles of the interradia. 



Fig. 161. The specimen from the "K. K. Hof-Mineralien Cabinet" Vienna, ventral view. 



Fig. 162. Another specimen, from the same collection, dorsal view. 



