250 ZOOPHYTES. 



The Syrijiiv, Pan's Pipe, or Lendicjera, consists of a very slender stalk, 

 from which a meagre distribution of boughs and branches originates irregu- 

 larly. At certain intervals, also, irregular enlargements are seen on the 

 various subordinate parts, but so minute, that their general form is scarcely 

 to be recognized as definite by the eye. The whole product is about two 

 inches high, expands as much, and is of faint dingy yellow. — PI. LII. fig. 1 ; 

 fig. 2, enlarged. 



Under the microscope, the indefinite enlargements on the subordinate 

 parts, are found to consist of a double row of cylindrical cells, with an ob- 

 tuse summit. Though generally described as in a double row, their real 

 arrangement is in partial alternation, the convex side of one being applied to 

 the opposite recess formed by the union of two, somewhat like the position 

 of two rows of cells in a honeycomb. Few having attended to this, most 

 probably has given rise to the proposed genus Scrialaria. 



Fourteen or fewer cells, compose a group or alternate double series. 

 The number in the group diminishes towards the extremities of the parts. 

 But the greatest number is not limited to fourteen : some groups contain- 

 ing more. The cells of the series shorten as they ascend, because the 

 lower cells come first to maturity. The disparity, however, is less evident 

 among the older of the series, though very conspicuous among the younger 

 or higher. Their origin and increment corresponds with what is seen in 

 the cells of the hnbrlcata. Larger specimens of the zoophyte bear 50 or 

 60 groups. The sustaining stalk extends beyond the farthest group by 

 prolongation, preparatory for new accessions. From vigorous vegetation 

 the obtuse extremities sometimes adhere to whatever they reach. 



The intervals between the groups are bare and transparent. But the 

 surface of both the stalk and the cells is speckled. 



An ascidian hydra, with eight tentacula, inhabits the cell, which rises 

 in active evolution, like the others, carrying up the convex summit of the 

 cell along with it. The orifice of the cell is connected with the margin of 

 the body, so that, in the rise and fall, they are in continual depen- 

 dence. A row of specks seems to traverse the middle of the tentacula. 

 Buoyant particles are tossed about among the hydrse, and when received 

 by the mouth in the centre, their deglutition becomes sensible, from trans- 



