7i€w Leech from Egypt. 



581) 



Crop with seven pairs of caeca. 



Anus situated between the two rings of somite xxvii. and 

 separated by one ring- from the posterior sucker. 



Size of the largest example, in a medium state of contrac- 

 tion, 14*5 mm. long and 5 mm. wide. 



riacohdclht cpf/yptiaca, sp. n. 



Diagram showing dorsal surface, part of anterior ventral surface, aunula- 

 tion, digestive tract, &c. Somites indicated in Eoman figures, rings 

 numbered in italics, vith., mouth ; i^b.s., proboscis-sheath ; cr., 

 crop ; St., stomach ; int., intestine ; an., anus. 



The nearly terminal mouth, the seven pairs of crop-ca^ca, 

 and the fact that its host is a tortoise place this leech beyond 

 doubt in the Glossosiphonid genus Placohdella (R. Blanchard, 

 1893). Another small species of Placohdella closely re- 

 sembling the one under consideration, recently sent to me 

 from India for identification and not yet described, preys 

 upon Trionyx gangeticus. 



