l88 BUSH 



ANALYTICAL TABLE FOR SABELLA AND RELATED GENERA. 



i. Collar absent 2. 



i'. Collar present 3. 



a. Anterior edge of first segment produced in front, forming a small angular ven- 

 tral lobe. 

 Uncini in tori on abdomen ; beaked setae in tori on thorax. 



(1) MYXICOLA (Koch 1846) Grube 1855 + Malmgren 1865, including Lepto- 



chone Claparede 1870, teste Marenzeller 1893. 



Type, M. infundibulum (Montagu 1808, figures) Koch 1846 -(- Saint- 

 Joseph 1898, figures. Greenland. 



Branchiae joined by membranous web. Inferior setae on thorax, below 

 collar fascicle, lanceolate in form, /. e., tapered, more or less elongated, 

 widest near lower end of blade. Uncini similar in form to those of Lcu- 

 cariste Malmgren 1865 (Terebellacea). Ventral setae on thorax with 

 broadened curved (beaked) end, more or less serrate on top, on a long, 

 nearly straight shaft or manubrium, similar to those of Tercbellides. 

 2'. Anterior edge of first segment produced in front, forming two long, pointed, 



ventral lobes. 

 Uncini in tori on abdomen ; uncini and pennoned setae in tori on thorax. 



(2) AMPHIGLENA Claparede 1864. 



Type, A. armandi Claparede 1864, figures, = A. medtterranea (Ley- 

 dig 1851) Claparede 1864+ Langerhans 1880, figures, -f Bourne 1883, 

 figures, + Saint-Joseph 1894, figures. Gulf of Naples. 



Branchiae free. Inferior setae on thorax, below collar fascicle, lance- 

 olate in form. Uncini avicular in form, those on the thorax the larger. 



3. Collar entire, without incisions or clefts. 



Pectinate setae in tori on abdomen ; beaked setae in tori on thorax. 



(3) HAPLOBRANCHUS Bourne 1883. 



Type, H. aestuarius Bourne 1883, figures. Coast of Isle of Sheppey, 

 England, and mouth of Liffey, Ireland. 



Branchial lobes small, bearing few ciliated (without pinnae) branchiae; 

 one eye on ventral surface of each lobe, beneath collar. Inferior setae on 

 thorax, below collar fascicle, lanceolate in form. Setae in thoracic tori 

 approaching the form found in TrichobrancJuis Malmgren 1865 (Tere- 

 bellacea); setae in abdominal tori with laterally serrate broadened end, 

 on long shaft or manubrium, approaching that in Lagis Malmgren 1867 

 (Amphictenea) with the elongated base of that form turned downward 

 as a shaft or manubrium. 



(4) MANAYUNKIA Leidy 1858 and 1884. 



Type, M. speciosa Leidy 1858 and 1884, figures. Schuylkill River at 

 Philadelphia, Pennsylvania, and Egg Harbor River, New Jersey. 



Branchial lobes laterally elongated, bearing numerous ciliated (without 

 pinnae) branchiae ; 7 eye-spots on each lobe. Young resembling Hap- 

 lobranchtis. Setae somewhat resembling those of Haplobranchus. 

 3'. Collar open on back, either with or without incisions or clefts 4. 



4. Collar open on back, without incisions or clefts (one-lobed) 5. 



