CAMPANELLA PACHYDEEMA. 



53 



can readily be seen through its thickness. The bell itself is of a dirty 

 yellowish color, with dark sorrel-colored spots scattered thickly over its 



surface ; these pigment spots are similar to the little bunches of lasso 

 cells found on the surface of Aurelia. The j)ouches are capable of 



expansion and contraction, as it wUl often be seen that the proboscis 

 has considerable play when the pouches are thrown out beyond the 



Fig. 70. Profile view of Campanella. 



Fig. 71. Aetinal view of Fig. 70 ; the tentacles are cut off". 



Fig. 72 is a somewhat more magnified view of Fig. 71, in which the pouches are thrown out 

 beyond the circular tube, ^j is the outer wall of the proboscis ; g, the genital pouches ; f, the place 

 of attachment of the veil, as seen from the aetinal side ; f, one of the pouches formed by the veil ; 

 /", the part of the veil intermediate between two pouches ; t, the base of a tentacle. 



Fig. 73 is a view of a part of the aetinal surface in the condition of Fig. 71, when the pouches 

 are drawn closely round the proboscis ; lettering as in Fig. 72. p', interior of proboscis. 



Fig. 74 is a magnified profile view of a portion of the base of a tentacle, c, the circular tube ; 

 t', the chymiferous tube ; p", the pigment spot on lower surface of bulb ; ?n, the upper pai't of sen- 

 sitive bulb, in which pigment cells are loosely scattered. 



Fig. 75. View of basal portion of tentacle, seen from above ; lettering as in Fig. 74. I, clus- 

 ters of lasso cells ; o, outer wall of bulb. 



