150 



ZOOLOGY 



or orange in color, and has long cirri, which, arising from 

 nearly every segment, reach out in all directions. These 

 function as gills, and when broken off may remain alive 

 for days. 



Clymenella, 1 which looks like a reddish, jointed straw, 

 builds tubes of agglutinated sand, and has a serrated, funnel- 

 shaped tail end. Its parapodia are very small (Fig. 139). 



FIG. 138. Tube of Cistenides. Nat. size. 

 Photo, by W. H. C. P. 



Fid. 139. Clymenella, straw- 

 worm. The anterior seg- 

 ments only are shown. 

 After M. Lewis. 



Amphitrite 2 (Fig. 136) builds firm tubes of sand. From 

 the head spring numerous tentacles and three pairs of blood- 

 red gill-tufts. The body is large anteriorly but becomes 

 slender behind, where there are no bristles. Allied to 

 Amphitrite are a large number of common worms found 

 on our coast. Polycirrus, or the blood-spot (Fig. 137), is 

 somewhat smaller than Amphitrite and characterized by a 



1 Diminutive of K\vfj.evr}, daughter of Oceanus. 



2 ' A.fjuj>tTplTij, wife of Neptune, goddess of the sea. 



