60 W. G. RIDEWOOD. 



the distal end of the parental stolon. In fig. 81 the large individual is a half- 

 crown bud, and the sau.sage-shaped structure is no larger than the stalk of the 

 former, and bears a small bud of exactly the same size as that borne by the 

 extremity of the stalk of the large bud. Further, there is an indication of a 

 constriction at the Ijasal end (jf the stalk of the large bud, which if completed 

 would convert the stalk into a sausage-like structure exactly similar to that shown 

 on the right side of the figure. One concludes, therefore, that the latter body is 

 the severed stalk of a half-grown bud. 



In fig. 79 there are two sausage-like bodies and three buds, two on the larger, 

 and a very small bud on the smaller. Fig. 83 shows a long curved, club-shaped 

 rod, and two buds, one with the fifth pair of plumes just appearing, the second 

 with the first plumes only, still attached to the extremity of the stolon of a normal 

 and healthy individual, not shown in the figure. The area from which the parent 

 stolon was dissected off" is marked a. In this case it is fairly evident that the club 

 is a bud-stalk. 



While groups such as are shown in figs. 78, 79, and 81 are not uncommon, the 

 o-roups which afford the evidence of the mode of origin of the sausage-like bodies are 

 scarce. In fig. 82 is shown a parent individual with a constriction of the stolon in 

 such a position that, if intensified so as to result in a division of the stolon, it will 

 leave in the bud-system a curved, sausage-like body such as that shown in figs. 78 

 and 79. The group shown in fig. 80 differs from the last in that the basal portion 

 of the parental stolon is attenuated and narrow, and is of interest as suggesting the 

 mode of origin of such a group as that shown in fig. 77, in which, while there is a 

 sausage-like body, less curved than usual, attached to the two buds, it is but the 

 terminal portion of a moniliform rod, the free end of which is pointed. 



The group shown in fig. 76 is interesting because the parent individual and its 

 stolon are still perfect, and yet there is a half-grown bud in process of severing its 

 stalk at about the middle of its length, and a curved, club-shaped body which 

 presumably represents the whole, or the distal part, of the stalk of a bud which has 

 previously cut itself off from the group. 



Only rarely is such a complex system as that shown in fig. 84 met with. In 

 this case it would appear that a is the severed stolon of the parent polypide of the 

 group; h, the largest individual present, is nearly full-grown, and has two buds of 

 its own, c and d ; the l)ud e has a bud of its own,/; but what are the relations of the 

 buds i/, h and _;' is not clear. The small size of _/' rather casts a doubt upon the 

 identification of a as the stolon of the main individual of the group, and yet a is 

 thicker than the stalk of h, and l> is not yet fully grown. 



Notwithstanding the difficulty of interpretation of the last group, one may 

 conclude that in general the parent polypide produces from the margin of the 

 flattened extremity of its stolon first one bud and then a second. The first bud 

 develops from the side of the distal extremity of its stalk a bud of its own, and then, 



