96 ANNELIDES. 



ff Proboscis very large, with one or two pairs of jaws, rarely 

 wanting : branchice either obsolete or lobular, inserted gene- 

 rally on the apex of the feet : tentacular cirri and spines 

 generally distinct. 



Family IV. NEREIDS. Branchiae obsolete, combined with the 

 lobes of the feet. 



Family V. NEPHTHYACE^. Branchiae in the form of a sickle- 

 shaped process between the foliaceous lobes of the feet : yjro- 

 boscis ciliated on the transverse cleft aperture. 



Family VI. PHYLLODOCID-ffi. Branchiae a heart-shaped leaf form- 

 ing the dorsal branch of the foot : proboscis encircled with 

 papillae. 



Family VII. GLYCERACE.ff:. Branchiae, when present, in the 

 form of a cirrus, on the dorsal branch of the two separate or 

 connate branches of the feet : head with four tentacula. 



Family VIII. SYLLID-SI. Head small, lobed in front, and tentacu- 

 lated : proboscis cylindrical, without jaws : feet uuiramous, with 

 two or only one cirrus : tentacular filaments elongate. 



*** Head confluent, indistinct : antenncB none, or rudimentary : 

 proboscis very short or none, without jaws. 



Family IX. AMYTIACE^. Tentacles two or four, moderate- 

 sized : proboscis none : feet uniramous or biramous : no bran- 

 chiae. 



Family X. AHICIADJE. Tentacles two, elongate, or none : pro- 

 boscis short, or none, without jaws or tentacles : feet short, 

 biramous, with or without cirri : the branchiae attached to their 

 base, filiform and cirriform. 



