92 ZOOPHYTES. 



pendent life. — Fig. 14. A young hydra, only a prominence on Septem- 

 ber 1, had withdrawn on the 21st. — Fig. 14, a. It had eight irregular 

 tentacula in an earlier stage, and was connected by a ligament to the 

 parent. 



It Avill be preserved in recollection that the subject just described was 

 the upper portion sundered from fig. 4, or what is originally named as 

 fig. 3, a. 



Pursuing the history of its companion, originally fig. 3, b, or fig. 15, 

 \vhich is the same as represented singly, an intimate correspondence will 

 be found with that of the preceding subject as to the leading featui-es. 



The stump, fig. 16, remaining after bisection, had regenerated about 

 12 tentacula in a fortnight. — Fig. 17. The number of these, together with 

 the dimensions of the stump, gradually augmented, and the whole of this 

 mutilated portion became subsequently a fine and perfect specimen, giv- 

 ing birth to progeny. 



It is therefore unnecessary to say more of the stump, fig. 16, the 

 lower half of fig. 15. 



But in regard to the upper half of fig. 15, or fig. 3, b, severed on 

 March 12, it appeared with its original tentacula on March 29, as repre- 

 sented fig. 18 ; enlarged, fig. 19. Their irregularity was then conspicuous. 

 Only their tips were visible on April 25 ; and soon after, these were 

 totally obliterated. 



This subject remained a shapeless mass on June 21, as represented 

 fig. 20, at which time it had not affixed itself to the watch-glass wherein 

 it lay ; neither had it done so a fortnight later. The change was great, 

 nor could I then account for it more than for the numerous prominences 

 distinguishing the former subject, fig. 9, originally the upper half of fig. 4, 

 or fig. 3, a 



But on July 23, there was an obvious alteration of fig. 20 advancing, 

 for it now exhibited several irregular tentacular organs spreading from 

 the surface. — Fig. 21. The whole shape improved progressively ; and on 

 August 9, it had grown quite symmetrical, with a due proportion of silky 

 tentacula. — Fig. 22. It was a perfect animal, in as far as regarded the 

 birth of progeny, for within twelve days a young hydra, first budding from 



