174 



PROBOSCIDACTYLA FLAVICIRRATA. 



fig. 282. 



chymiferous tube dividing into two main branches, and each branch 



subdividing again into eight, making in all sixty^ 

 four branching tubes, and as many tentacles and 

 eye-specks. Between each of the ocelli there ex- 

 tends from the circular tube a small tube pene- 

 tratino; into the thickness of the edo;e of the 

 spherosome, which projects a considerable distance 

 beyond the circular tube. The color of the di- 

 gestive cavity is dirty yellow, the tentacles are 

 of a brilliant straw color, and the ocelli dark blue. 

 The whole exterior of the spherosome is densely 

 granulated, the projections being probably some- 

 thing similar to what we find on the disk of Au- 

 relia flavidula, made up of large lasso-cells, only 

 much more densely crowded together. The shape 

 of the bell is almost perfectly thimble-shaped, 



there being neither bulging nor striking indentations of the periphery. 



The motions of this Medusa are very rapid ; the tentacles are capable 



of but little contraction. 



Petropolawsky (Mertens) ; Gulf of Georgia, W. T. (A. Agassiz). 



Cat. No. 62, Gulf of Georgia, W. T., June, 1859, A. Agassiz. Medusa. 



Fig. 282. Portion of disk, to show the mode of bi-anching. b, fu-st fork ; /, tubes containing 

 lasso-cells, as in WiUia. 



