16 



OLIGOCH.ETA are rare on the shore, hut a few forms 

 have been found among seaweed ahove high-water mark, 

 and some small species are partly marine. 



For Leeches, cf. ii (a), p. 14. 



For Phoeonidea, see p. 8. 



Enteropneusta (see Fig. 17) may l^e looked for 

 on sandy shores at extreme low-tide mark. They 



Figure W. 

 Hennioae hystrlx, one of the spiny 

 Polyehffites. related to tlie "sea- 

 mouse"; slightly enlarjred. [CH.E- 



TOPODA.] 



form large sand-casts, resembling those of Polychietes, 

 and they may be found by digging in the neighbourhood 

 of these casts. They must be handled with great care 

 (see p. 9). 



