l88 BUSH 



ANALYTICAL TABLE FOR SABELLA AND RELATED GENERA. 



1. Collar absent 2. 



\'. Collar present 3. 



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



tral lobe. 

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



(i) 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 189S, figures. Greenland. 



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

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

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

 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 TerebclUdes. 

 z\ Anterior edge of first segment produced in front, forming two long, pointed, 

 ventral lobes. 

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



(2) Amphiglexa Claparede 1864. 



Type, A. armaudt Claparede 1864, figures, = -<4. mediterranea (Ley- 

 dig 1 851) Claparede 1864 + Langerhans 1880, figures, + Bourne 1883, 

 figures, -f 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 setse in tori on abdomen ; beaked setse in tori on thorax. 



(3) Haplobranchus Bourne 1883. 



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

 England, and mouth of Liffey, Ireland. 



Branchial lobes small, bearingyew ciliated (without pinnae) branchiae; 

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

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

 approaching the form found in Trichobranchiis Malmgren 1S65 (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 18S4, figures. Schuylkill River at 

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



Branchial lobes laterally elongated, bearing vufnerous ciliated (without 

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

 lobranchus. 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. 



