LIST OF ILLUSTKATIONS XV 



PLATE XVII. 



To face p. 397. 



Page 



a. Microniscus calani, Sars. Bars . . . 397 



b. Cyproniscus cypridinae (Sars). A female (with a male 



in the normal position) affixed to the body of a Cypri- 

 dina norvegica. The right valve of the host has been 

 removed. Sars . 397 



c. Adult ovigerous female of the Cyproniscus, detached, and 



viewed from above 



d. Younger female, not yet ovigerous, in lateral view 



e. Male, probably adult, with the anterior extremity carrying 



two root-like processes, and embedded in the skin of the 

 Cypridina 

 /. Larva in the last stage of development, seen from above 



PLATE XVIII. 



To face p. 414. 

 Portunion rnsenadis, Giard, on Carcinus msenas (Pennant). 



Giard and Bonnier . . 407 



Portunion Kossmanni, Giard and Bonnier, Giard and 



Bonnier ..... 408 



Cancricepon elegans, Giard and Bonnier. Lateral view of 



female ; dorsal view of male and female. Giard and 



Bonnier . . . .413 



Gigantione Moebii, Kossinann. Dorsal iand ventral view of 



female. Kossmann .... 



PLATE XIX. 

 To face p. 425. 



Helleria brevicornis, von Ebner 



The head from above, the head and pleon from below ; 

 the antenna ; mandible, lower lip ; first maxilla, second 

 maxilla, maxilliped ; first leg ; rudimentary first pleopod 

 with opercular plate of the second, stilet of the second 

 pleopod, fourth pleopod showing the opercular plate 

 broadside and edgeways, and the peduncle with the bran- 

 chial plate ; uropod. Von Ebner 



a 



