/. CBUSTAGEA: I80P0DA. 



441 



into the skin. The Bopyridae live in the branchial chamber of shrimps. 

 Cryptonisctis is a shapeless sac which attaches itself to the stalk of Sacca- 

 lina (p. 436), and, after causing the death of this parasite, uses its network 

 of ' roots ' for its own nourishment. The Entonisoidie (fig. 458) attack 



""f-k-^ 



W 



Fig. l53.—Entonisciisporcellunce. (From Gerstiicker, after Miiller.) J, male; B, female; 

 C, heart; he, liver; la, brood lamella^; ou, ovary. 





Fig. 454.—^, Idotea irrorata *; B, Limnoria lignorum *; C, ^ga psora * (' salve bug '); 

 D, Leptochela algicola* (After Harger.) 



Decapoda and, pressing the skin before them, penetrate the interior. Their 

 strange shape is largely due to the lobe-like brood lamella. They are 



