MANUAL OF NATUKAL HISTORY. 315 



6. Family. — Campontias (Campontiidae). Body 



cylindrical, of few joints ; pediform appen- 

 dages two, large, retractile, without cirrhi, 

 furnished with setae ; hook-like organs on the 

 first segment behind the head ; penultimate 

 ring with two bundles of bristles ; last seg- 

 ment with two large tubercles, each with a 

 circle of hooks. 

 As in the other families of this Order, there 

 are distinct eyes, tentacles, and horny jaws. 



7. Family. — Peripatiens (Peripatidae). Body sub- 



cylindrical, of few segments, which are again 

 annulate ; no distinct gills nor dermal appen- 

 dages ; pediform appendages numerous, with- 

 out cirrhi at their bases, but with tufts of 

 bristles at their ends. 

 Like the other members of this Order, there are dis- 

 tinct antennae, and a proboscis armed with two jaws. 



II. SUB-ORDER. — Exantenn ate- Annelids 

 (Exantennata). 



Head not very distinct, without antennae, eyes, 

 or jaws ; dermoid appendages none, or branchi- 

 form ; pediform tubercles often reduced to setae. 



8. Family. — Earth-Worms (Lumbricidae). Body 



elongate, cylindrical, without dermoid appen- 

 dages, divided by transverse furrows into a 

 great number of rings ; rudimentary eyes on 

 the head ; mouth simple. Live in perforations 

 of moist earth. 



9. Family. — Fresh-water Worms (Naidae). Body 



f2 



