Plate VII. 



Pourtalesia carinata Al. Ag. P. ceratopyga Al. Ag. P. laguncula Al. Ag. Echinocrepis cuneata Al. Ag. 



Fig. 47. Peripodia and spliperidia of the arabulacrals V a 1 and V h 1 in P. carinata. 



Fig. 48. The sub-oral region of P. ceratopyga; ambulacrals coloured. 



Fig. 49. A part of the same, in a different position. 



Fig. 50. A part of tlie same with pedicels, spines, and spherids. 



Fig. 51. The calycinal system of the same, with the surrounding region, p. 80. 



Fig. 52. The same parts in P. laguncula. 



Fig. 5.3. The sub-oral region of Echinocrepis cuneata; ambulacrals coloured. 



Fig. 54. The calycinal system and surrounding area in the same. 



