308 BULLETIN OF THE 



EXPLANATION OF THE PLATE. 



LETTERS. 



a. Auricles, 



a t. Auricular vessels. 



b 0. Bell opening. 



b w. Central part of the nectocalyx. 



c. Bifurcation of tubes from the funnel. 



ca. Cavity. 



Primary divisions of c. 



Connection between the otocyst and the rows of combs. 

 Wings of bell. 



Termination of the chymiferous tubes in marginal lappets. 

 Tentacular cavity (basal). 

 Clusters of lasso-cells. 

 Funnel. 



Remnant of former tubular connection with hydroid or medusa. 

 g m. Lasso-cells. 

 H. h. Lasso-cells. 



h d. Hood. 

 I. i. Chymiferous tubes. 



i r. Inner recesses (Riechgriibschen). 

 J. y. Peduncle. 

 K. ^•. Budding stolon. 

 L. I. Lateral tubes. 



Im. Muscular layer on under floor (color white). 

 Id. Gelatinous tissue. 

 1 1. Bifurcation of lateral tubes. 

 1 1. Lobular vessels. 

 M, m. Mouth. 



wi/. Muscular fibres. 

 m I. Marginal lappets. 

 vip. Pigment. 

 0. oc. Ocellus. 



I. Oral lappets. 

 (m. Ovaries. 



i. Enlargement of a chjTniferous tube. 

 ot. Otocyst. 



otc. Cavity between the marginal lobes into which the marginal sense body 

 projects. 



