126 



STAEFISH GALLEEY. 



(224), Serpula (249); a number of forms of worm-tubes, showino; 

 their great variety and beauty (see especially the delicate Filograna) 

 (239), are to be seen in the small Table-cases placed against the north 



Fig. 19. 



Home of Panthalis oerstedi. 



wall of the Gallery. Attention should be especially directed to Mr. 

 A. T. "Watson's beautiful preparations of Terebella littoralis (226). 



Fio;. 20. 



n.c. 



Section across the body of an earth-worm to show the disposition of the more 

 important organs ; the body wall (to) consists of dermis, circular, and longitu- 

 dinal muscles ; the body cavity is divided by membranes (c) into a series of 

 chambers, in each of which opens the mouth of a coiled nephridium (?i). The 

 axis of the cavity is occupied by the intestine {i) ; above and below it is a 

 longer blood-vessel («), and below it is also the central nerve-cord (jig). 



We give a figure (Fig. 19) after a drawing by that gentleman of the 



home of Panthalis oerstedi, the tube-forming habits of which have 



been carefully observed by him. 



