l-l HABITS OV WORMS. Cum: 1. 



earth-worm deboucli into the alimentary 

 canal in advance of the gizzard, but pos- 

 teriorly to it in Urochtsea and some other 

 genera.* The two posterior pairs are formed 

 by lamellse, which according to Claparede, 

 are diverticula from the oesophagus.f These 

 lamellae are coated with a pulpy cellular 

 layer, with the outer cells lying free in in- 

 finite numbers. If one of these glands is 

 punctured and squeezed, a quantity of white 

 pulpy matter exudes, consisting of these free 

 cells. They are minute, and vary in diameter . 

 from 2 to 6 /i. They contain in their centres a 

 little excessively fine granular matter ; but 

 they look so like oil globules that Claparede 

 and others at first treated them with ether. 

 This produces no effect ; but they are quickly 

 dissolved with effervescence in acetic acid, 

 and when oxalate of ammonia is added 

 to the solution a white precipitate is thrown 

 down. We may therefore conclude that 

 they contain carbonate of lime. If the cells 



* Perrier, ' Archives de Zoolog. expdr.' July, 1874, pp. 41P, 

 )I9. 



t ' Zeitschrift fiir wissenschaft. Zoologie,' B. xix. 1869, pp. 

 GO3-606. 



