390 
PACIFIC SCIENCE, Vol. V, October, 1951 
150 km. from the sea and beyond tidal effects; 
it occupies sandy tubes on mollusk shells and 
in incrustations on stones. 
Genus Oridia Rioja, 1917 
This genus differs from Fabricia Blainville 
essentially in having abdominal uncini that 
lack a handle. There are 8 thoracic and 3 to 12 
abdominal setigerous segments. Tentacular 
radioles number two to five pairs and have 
filaments in pinnate arrangement. A thoracic 
collar is present or absent. Peristomial and 
pygidial eyespots are present. Thoracic un- 
cini resemble those of Fabricia. Four species 
are recorded from the Pacific (see above) . One 
is here newly referred to Oridia. 
Oridia armandi (Claparede), 1864, is the 
type species. 
Oridia minuta (Berkeley and Berkeley) 
new combination 
Fabricia minuta Berkeley and Berkeley (1932: 
315-316, figs. A-E). 
Total length is about 11 mm. and width is 
about 0.1 mm. The body consists of eight 
thoracic and three to five abdominal setiger- 
ous segments. The tentacular crown consists 
of two pairs of radioles with pinnately ar- 
ranged filaments. A thoracic collar is lacking. 
Peristomial and pygidial eyespots are present. 
Thoracic notosetae are slender and subspatu- 
late. Thoracic uncini are sharply curved; ab- 
dominal uncini lack a stem. 
This species is known only from the west 
coast of Vancouver Island, Canada, from 
among algae. 
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