200 DISCOVERY REPORTS 



Family PHYLLODOCIDAE 



Not exclusively pelagic. Body normally long and slender with numerous segments, except in the 

 pelagic genera where it is short and wide and the number of segments is small and fixed within 

 narrow limits. Prostomium normally with eyes and four or five antennae. First two or three segments 

 with tentacular cirri. Parapodia uniramous or biramous with simple and/or compound chaetae ; cirri 

 normally present. Proboscis protrusible, usually with papillae, exceptionally with chitinous jaws. 

 Anal cirri normally present. 



Subfamily Lopadorhynchinae 



Exclusively pelagic. Prostomium with four antennae. Compound chaetae always present, simple 

 chaetae may be absent. Anal cirri sometimes present. 



Genus Lopadorhynchus Grube, 1855 

 (Emended Malaquin and Dehorne, 1907 pro Lopadorrhynchns Grube, 1855) 

 Two dorsal antennae appear as extensions of the anterior lateral border of the prostomium and two 

 ventral antennae are close to the mouth. Normally three pairs of tentacular cirri, exceptionally two. 

 Parapodia uniramous and modified anteriorly so that the body is divided into two distinct regions: 

 simple and compound chaetae are present supported by a prominent pedal lobe with acicula. Dorsal 

 cirri present on all parapodia, ventral cirri may be absent on anterior feet, always present elsewhere. 

 Proboscis smooth or papillate. Anal cirri absent. 



Type species. Lopadorhynchus brevis Grube, 1855. 



Type locality. Mediterranean. 



In 1 9 14 Bergstrom founded the genus Prolopadorhynchus to include species of Lopadorhynchus 

 with ventral cirri on the first two parapodia. Most authors have adopted Prolopadorhynchus as a 

 subgenus on this basis, but I see no purpose served by this division. The genus is not large enough to 

 warrant artificial separation purely for convenience and the modifications, which have been ascribed 

 by most authorities to anterior ventral cirri, make it difficult to define their presence or absence in 

 several species, confusing rather than clarifying the situation. 



Lopadorhynchus brevis Grube, 1855 



Lopadorrhynchus brevis Grube, 1855, p. 100, pi. 3, fig. 15. 



Lopadorhynchus brevis Kleinenburg, 1886, p. 21. 



Lopadorhynchus brevis Reibisch, 1895, p. 35. 



Lopadorhynchus brevis Lo Bianco, 1904, p. 52, pi. 24, fig. 121. 



Lopadorhynchus brevis Ehlers, 19 13, p. 463. 



Lopadorhynchus brevis Bergstrom, 1914, p. 181. 



Lopadorrhynchus parvum Chamberlin, 1919, pp. 1 14-16, pi. 17, figs. 6, 7. 



Lopadorrhynchus nans Chamberlin, 1919, pp. 1 16-19, P^ *7> n 8 s - I_ 5- 



Lopadorhynchus brevis Fauvel, 1923, p. 184, fig. 69 K. 



Lopadorhynchus brevis Monro, 1930, p. 78. 



Lopadorhynchus brevis Monro, 1937, pp. 266-7. 



Lopadorhynchus brevis Monro, 1939 a, p. 347. 



Lopadorhynchus brevis Wesenburg-Lund, 1939, pp. 12-15, figs. 8-10, chart 7. 



Lopadorhynchus brevis Stop-Bowitz, 1948, p. 18. 



Description. This species may measure 20 mm. long by 7 mm. wide, across the tips of chaetae for 

 twenty-seven chaetigers, but normally specimens measure between 8-9 mm. by 4 mm. wide for 

 twenty-two to twenty-four chaetigers. The body is divided into two separate regions at the posterior 



