WORMS. 



the neck, or anterior part of tlie body, are represented by trans- 

 verse rugae, the marginal angles of which scarcely project beyond 

 the lateral line ; the succeeding segments are subquadrate, their 



iijr. 4. 



Fia-. 3. 



length scarcely exceeding their breadth ; they then become 



sensibly longer, narrower anteriorly, thicker and broader at the 



posterior margin, which slightly overlaps the succeeding joint. 



The last series of segments are sometimes twice or three times 



FF 



