312 



CWLIIELMINTIIKS. 



bristles of each side are sui^ported b)' a fleshy outgrowth of the 

 somite, the parai^odinm, in which two portions corresponding to the 

 bunches of bristles — dorsal, notopodiutn; ventral, neurop}odium 



-may be recognized (fig. 

 A 



281). This is the first appearance of 



B 





.^ 



Fig. 981. — -4, head with protruded phaiTnx; B, parapodium of A>?-e/-5 ver.^ipedaia. 

 (After E)ilers } t, tiiii /., laws; K head with eyes; p, palpi; t, tentacles. 



true appendages, but they differ from those of Arthropoda in 

 that they are not jointed to the body nor jointed in themselves. 

 On the dorsal surface may occur diverse outgrowths, known, accord- 



-Aiiipltilrite ornaia* (From Verrill.) 



iug to position or function, as (urri, elytra, gills, etc. ; on the head, 

 l)ali)i and tentacles. The cirri arc long i)rocesses on the parapodia, 

 -ind like palpi are tactile (lig. -,'81). Elytra are tliin lamellae 

 whi(;h cover the back like shingles and thus protect the body. 



