1 



1' 



2 



2' 



3 



3' 



FAMILY ARABELLIDAE 



Key to genera and species 



Parapodia with one or more stout projecting acicula as well 



as fine-tipjied internal ones 2 



Parapodia without a stout projecting aciculum iAnihclld) 5 



Maxilla I with first tooth greatly enlarged forming a pair of 



fangs or pincers {Driloiioris) 3 



Maxilla I with first tooth not much larger than others (Noto- 

 ch-riis). [Mandiljles present. Mx. I with 3-4 small denticles 

 at base] N. spijiifenis 



Mx. I with dentate bases 4 



Mx. I with smooth bases. [Mandibles usually absent] D.fiUim 



Parapodia inconspicuous on anterior segments but well de- 

 veloped and bilobed posteriorly. Mandibles very small, some- 

 times missing D. loiic/a 



Parapodia small on anterior segments, but larger posteriorly, 

 though always with a single (postsetal) lobe. Mandibles 

 obvious D. niag)ia 



Setae are all winged capillaries Arabella iricolor 



Setae include winged capillaries and an inferior, blunt acicu- 

 lum with a small tapered blade Arabella nut tans 



Noincirn/s .spinifenis (Moore. 1906) 



Drilonereis lonqa Webster, 1S79 



Notdcirrax spii/ifo-us. - Pettibone, 1963a: 275, 

 Fig. 73 a-i. 



Ricords. — Chesapeake Bay, intertidal and 

 Beaufort in 5 m (17, *). 



Dixtribtilidii. — Massachusetts to North Caro- 

 lina; intertidal to 16 m. 



Diilonereis hniga. - Hartman, 1944a: 178; - 1968: 

 801, Fig. 1. - Pettibone, 196.3a: 272, Fig. 

 72 a-h. 



Records. — North Carolina, intertidal (3, 5, 11, 

 17, 18). 



Distribution. — Massachusetts to Georgia and 

 the West Indies; Washington; southern Cali- 

 fornia; intertidal to 2,452 m. 



Drilonereis filum (Claparede, 1868) 



Drihinereis filnni. - Fauvel. 1923: 436, Fig. 174 

 a-h. - Hartman, 1944a: 180; 1968: 799. Fig. 

 1,2. 



Drilonereis magna Webster and Benedict. 1887 



Dril(ine)'eis niagtia. - Pettibone, 1963a: 273, 

 Fig. 71 h. 



Records. — Cape Hatteras area, intertidal (18). 



Distributio)!. — Mediterranean; Atlantic coast 

 of France; Florida; Panama; southern Cali- 

 fornia; low tide and shallow dredgings. 



/?rrorf/.s. — North Carolina, intertidal to 200 m 

 (11, 13, 17, 18,21, *). 



Dist)ibutio)i. — Newfoundland to South Caro- 

 lina and the Gulf of Mexico; California to western 

 Mexico; low tide to 1,000 m. 



63 



