﻿WORMS. 



15? 



Another species very common on the sea-shore, under 

 stones, is mnch shorter than the one just described. It has 

 two rows of oval scales along the back, and the mouth is fur- 



FiG. 144. — A Ck)MiiON Sea-Wcem. 



nished with po'>rerf ul jaws, which work up and down. Wlien 

 they are placed in alcohol these jaws generally protrude. 



143, Some species have a curious way of protruding 

 their oesophagus when they seize theu' food, at the end of 



Fig. 145. — A Sea-Worm with Scales. — The eyes may "be seen, four in number, between the 



forward scales. 



which appear the jaws, like sharp claw-shaped teeth. The 

 following figure shows the anterior end of one of these 

 worms, with the cesophagns protruded, in the act of se- 

 curing its prey. 



Certain other sea-worms build tubes of mud or sand 

 in which they live, and many of these have bunches of 



