As part of a survey of the Mediterranean enchytraeids, large numbers o
f samples were collected from a wide range of habitats at 38 localitie
s of Tunisia and Algeria in 1989. Twenty species were identified belon
ging to six genera. Five species are new records for Tunisia and 17 ar
e new for Algeria. Most of the recorded species are widely distributed
throughout Europe, or even cosmopolitan, but some have a more restric
ted range. Fridericia caprensis has a circummediterranean distribution
, Fridericia sardorum seems to be endemic to the western Mediterranean
and Fridericia berninii is known only from the Balearic Islands and A
lgeria. Enchytraeus minutus bisetosus n. ssp. is described. A critical
revision of some species is also provided.