286 XJ-S. NATIONAL MUSEUM BULLETIN 2 27 



Island, Nobska; Nantucket Sound, Lagoon Pond, Martha's Vineyard), 

 Khode Island, low water to 18 fathoms; Florida (Seahorse Key). 



Distribution. — Off Massachusetts (Cape Cod) to Florida, Gulf of 

 Mexico, southern California, Lower California, Mexico. Low water 

 to 18 fathoms. 



Genus Scoloplos Blainville, 1828 



Haploscoloplos Monro, 1933a, type (original designation): Haploscoloplos cijlin- 

 drifer (Elilers, 1905). 



Type (monotypy): Scoloplos armiger (O. F. Miiller, 1776). 



Subgenus Califia Hartman, 1957 



Type (monotypy): Califia calida Hartman, 1957. 



All the species represented have the body, long, slender, divided into 

 anterior thoracic and posterior abdominal regions (fig. 76a) . Thoracic 

 region inflated, subcylindrical or more or less flattened, tapering 

 rather abruptly anteriorly, with parapodia lateral. Abdominal region 

 much longer than the thoracic region, semicircular in cross section, 

 flattened dorsally, tapered gradually posteriorly, often fragmenting, 

 with parapodia elongated, directed dorsally. Prostomium conical, 

 without appendages, usually without eyes (fig. 76c). Single achaetous 

 tentacular or buccal segment, without tentacular cirri. The buccal 

 segment and the first setigerous segment involved in the mouth. 



Thoracic setigers 12-33 (figs. 74e, 7Qe). Notopodium with a simple 

 conical postsetal lobe (may be missing or inconspicuous in more ante- 

 rior segments) , with a fan-shaped group of crenulate capillary notosetae. 

 Neuropodium with a simple conical postsetal lobe, with several 

 transverse rows of neurosctae arranged in a fan-shaped group. 

 Neurosetae may be all crenulate capillaries or some may be crotchets, 

 with blunt tips. 



Abdominal region (figs. 74/, 76,/,^) with parapodia du'ected dor- 

 sally. Notopodia with digitate or Hgulate postsetal lobes, with a 

 compact radiating tuft of crenulate capillary setae (there may be a 

 few additional forked setae; broken crenulate capillary setae?). 

 Neuropodia cylindrical with bilobed tip enclosing a small bundle of 

 crenulate capillary setae. Where observed, posterior end mth a 

 single pair of long filiform anal cirri, ventrolateral on anal ring (fig. 

 766). Branchiae begin on setigers 8-32, continuing to near end of 

 body. Branchiae paired, simple, small, triangular at first, becoming 

 long, ligulate in abdominal region, densely ciliated up to near distal tip. 



