SELF-FERTILIZATION IN CIONA. 3 I 



- 



results with the F-eggs. There is nothing calling for comment 

 in the behavior of the d-sperm ; while the e-sperm was surpris- 

 ingly deficient with the B and the D-eggs, although excellent 

 with C. The f-sperm gave excellent results with the C and the 

 D-eggs, but was less good with B. The later development of 

 the eggs in this series was not observed. 



TABLE III. 



The A, B, C, D-eggs appear to have been excellent ; the E- 

 eggs poor, and the F-eggs probably good. The a and the b- 

 sperm appear to have been good, and the latter, in the case of 

 F, gave unexpectedly good results. The c-sperm was also good, 

 but gave with D only 50 per cent, of segmenting eggs. The d, 

 e, f- sperm was poor. 



The embryos (tadpoles) were examined after 24 hours with 

 the results recorded in the following table : 



TABLE III. Continued. 



A a A" Abn. A c Abn. A d Abn. A e One A f o 



abn. 

 B a Abn. B" B c Nearly B d Abn. B e Abn. B f One 



norm. norm. 



C a Norm. C b Norm. C c C' 1 Most C e Most C 1 One 



abn. norm. norm. 



One norm. 

 D a Most D 1 ' Most D c Abn. D d D e Abn. D r Abn. 



abn. abn. 



E a Abn. E 1 ' Abn. E c Abn. E d E e E f Abn. 

 F a Abn. F h Abn. F c Abn. F d o F e o F f 



Although A 1 ' and A e gave 80 per cent, of cases of fertili- 

 zation they produced only abnormal tadpoles. B a gave also 

 only abnormal tadpoles, while B c gave nearly normal tadpoles. 

 Although only one egg in B f was fertilized it produced a normal 

 tadpole. The C-eggs gave even more curious results. The C a 

 and C"-eggs gave exceptionally normal and active tadpoles ; the 

 C d -eggs were abnormal (excepting for one individual) ; most of 



