The Classification and Distribution of Earthworms. 265 



seems to me to best express their mutual relationships in the 

 light of our present knowledge. 



I^rk^ckK—MON ILIGASTRES, 

 Branch B—L UMBRICI. 

 Group I.— EUDRILINI. 



Fam. Eudrilidse. 



Genera — Eudrilus, Teleudrilus, Nemertodrilus, 

 Polytoreutus, Stuhlmannia. 



Group II.— ACANTHODRILINI. 



Fam. 1. PerichsBtidae. 



Genera — Perichmta, Megascolex^ Iloplochcp.ta^ Aniso- 

 chmta, Aporochceta, Perionyx. 



Fam. 2. DeinodriUdae. 

 Genus — Deinodrilus, 



Fam. 3. Acanthodrilidae. 



Genera — Acanthodrilus, Trigaster, Benharaia. 



Fam. 4. Crypto drilidse. 



Genera — d'yptodrilus, Megascolides, ? Plutellus^Digas- 

 ter, Didynnogaster, Dichogaster, Perissogaster, Micro- 

 scolex, Photodrilus, Pontodrilus, Phododrilns, 

 Typhosus, Deodrilus, Eudriloides^ Callidrilus, 

 Pygmceodrilus. 



Group III.— GEOSCOLECINI. 



Fam. 1. UrochsetidsB. 



Genera — UrochcBta, Diachoita, Onychochoita, 

 Fam. 2. Geoscolecidse. 



Genera — Geoscolex, Hormogaster, ? Glyphidrilus. 

 Fam. 3. Rhinodrilidse. 



Genera — Rhinodrilus, Microchwta, Brackydrilus, 

 Urobenus, ? Anteus. 



Group IV.— LUMBRICINI. 



Fam. LumbricidSB. 



Genera — Lugubrious, AUolobophora, Allurus, Tetra- 

 gonurus. 



