132 



CRUSTACEA PERACARIDA 



large cells at the interior borders of the testes begin to feed 

 upon the remains of these organs and to grow enormously in 



size and to multiply by 

 amitosis. These phago- 

 cytes, as they really are, 

 attain an enormous size, 

 but they are doomed to 

 degeneration, the chrom- 

 atin becoming dispersed 

 through the cytoplasm, 

 and the nuclei dividing 

 first by amitosis and then 

 breaking up and dis- 

 appearing. As the para- 



FiG. 88. -Side view of Dcmalia curvata, x 15, . 



shortly after fixation and loss of larval appen- Site grOWS, the heart at 



dages ^, Alimentary canal; ^, eye ; 77, heart ; the posterior en( l O f the 



j\, phagocytic cells ; 0, ovary ; P, proboscis. * 



body ceases to beat ; the 



ovaries increase enormously at the expense of the alimentary 

 canal, and on the ventral 

 surface two pairs of sper- 

 mathecae are invaginated 

 ready to receive the sper- 

 matozoa of a larval male. 

 In the adult condition, after 

 fertilisation has taken place 

 and the ovaries occupy N " 

 almost the whole of the A 

 body, the remains of the 

 phagocytic cells can be 

 seen on the dorsal surface 

 in a degenerate state. They 

 evidently are not used as 

 food, and their sole function 

 is to make away with the 

 male organisation when it , cn 



Fia. 89. Optical section (dorsal view) of Danaha 



V.QC. >> Q a nc-aloco i curvata, in the same stage as Fig. 88. A, Ali- 



mentary canal ; EC, ectoderm ; H, heart ; iV, 

 phagocytic cells ; 0, ovaries ; P, proboscis. 



has become useless. 



In the series Bopyrina, 

 after the free -living Epi- 



1 M. Caullery (loc. cit. p. 130) questions the truth of this observation, but I am 

 convinced of its accuracy. 



