TOILERS IN THE SEA. 



and his remarks are still applicable He says, " The 

 organ, in the greater number of cases, very closely 

 resembles the head of a vulture (fig. 59) ; but the 

 lower mandible can be opened 

 much wider, so as to form even 

 a straight line with the upper. 

 The head itself possesses consi- 

 derable powers of movement, by 

 means of a short neck. In one 

 zoophyte the head itself was 

 fixed, but the lower jaw free ; 

 in another it was replaced by 

 a triangular hood, with a beau- 

 tifully - fitted trap - door, which 

 evidently answered to the lower 

 mandible. A species of stony 

 Eschara had a structure some- 

 what similar. In the greater 

 number of species, each cell was 

 provided with one head, but in 

 others each had two. 



" The young cells at the end 

 of the branches necessarily con- 



^.^ ^ immature po l ype s, 



yet the vulture-heads attached to them, though small, 

 were in every respect perfect. When the polyp was 

 removed by a needle, from any of the cells, the 

 organs did not appear in the least affected. When 



FIG. 59- 

 CELLULARIA AVICULARIA. 



