FAMILY PECTINARIIDAE 

 Key to subgenera and species 



1 Cephalic veil quite free from operculum 2 



r Caphalic veil completely or partly fused to operculum. [Oper- 

 cular rim smooth. Fifteen setigers of which 12 have uncini. 



(subgenus Lagis)] No N.C. record 



2 Opercular rim dentate (subgenus Aniphictoic) No N.C. record 



2' Opercular rim smooth (subgenus Pcct'nntrid) [Twelve seg- 

 ments with uncini; uncini with about 7 majoi- teeth; about 



15 pairs of scaphal hooks] P. (Pcct'niaria) f/nnldii 



Pectinaria (Pectinaria) gouldii Rcc<})-ds. — Cape Hatteras to Beaufort, inter- 



Verrill, 1873 " tidal to 120 m (2, 3, 5. 7, 9. 11, 1?., 15, 18, *). 



Distribution. — Massachusetts to Florida and 



PfctiiKiria (Ci-'iteiiides) f/Diildii. - Hartman. the West Indies; intertidal to 120 m. 



1941b: 328, pi. 50: Fig. 11, 17, pi. 52: Fig. 20. 

 Cisti aides (/(iiildii. - Hartman, 1942a: 74, Fig. 

 130, 135, 138. 



FAMILY AMPHARETIDAE 

 Key to genera and species 



1 Small acicular neurosetae embedded laterally on segments 



3-6. Short, stout notopodial hooks sometimes present behind 



gills (M(liinii)iae) 2 



r No neurosetae laterally on segments 3-6. No hooks behind 

 gills. [Large paleae sometimes present on segment 3 {Am- 

 pliavctiiKu)] 4 



2 Postbranchial hooks present 3 



•?.' 



No postbranchial hooks. [Thirteen uncinigerous thoracic seg- 

 ments. Ridge across segment 6 dentate] M( limiopsis athmtica 



3 Fourteen uncinigerous thoracic .segments. Ridge across .seg- 



ment 6 dentate. All 4 jiairs of gills smo(jth Mdiiniu uiacnlata 



3' Thirteen uncinigerous thoracic segments. Ridge across seg- 

 ment 6 smooth-edged. Four pairs of gills; two pairs smooth 

 and two pairs pinnate Isalda piilchella 



4 Two pairs of gills; [12 uncinigerous thoracic segments. First 



two rows on uncini long and ventrally placed] Anchoiopla.r rriiiita 



4' Three pairs of gills; [12 uncinigerous thoracic segments. 



Buccal tentacles smooth. No glandular ridges on pro- 



stomium] Sumtjt Julia cliasoiii 



4" Four pairs of gills 5 



111 



