WEISMANN'S THEORY OF THE GERMPLASM 53 



The third animal in which heteromorphosis was 

 produced artificially was Clone intestinalis, a 

 solitary ascidian, an animal more highly organized. 

 In done (Fig. 2) the edges of the month-opening 

 and of the cloaca are provided with numerous, 

 simple eye-spots. Loeb, in a series of experiments, 

 made incisions either into the inhalent or the ex- 

 halent tube ; after a time eye-spots appeared round 

 the edges of the cut ; then the margin of the arti- 

 ficial oral opening grew out into a tube, even longer 

 than the normal oral tube. 'If several incisions 

 be made simultaneously at different places on the 

 same animal, then several new tubes arise simul- 

 taneously.' 



In the three cases, the cut surfaces, from which 

 in Tubularia, a head, in Cerianthus, tentacles, and 

 in done, eyespots, took their origin, were made in 

 different parts of the bodies and in different direc- 

 tions. Thus, again, we have an indication that 

 there are present in most regions of the body cell- 

 groups, which may give rise to complex organs 

 in unnatural positions, and yet bearing the specific 

 stamp. 



These examples might easily be multiplied, and 

 they serve to show that heteromorphosis in plants 

 and animals implies the presence of numerous 

 latent characters in cells and tissues, in addition to 

 the characters proper to their normal position in 

 the organism. These latent characters, under the 

 impulse of stimulation from without, manifest 

 themselves in abnormal formation of organs in 

 abnormal situations. Save that they are in ab- 



