DETERMINATION OF GENERIC TYPES, ETC. 67 



Dacnitis Dujardin, 1845; ? esuriens, by virtual 4autonymy, very common, and because 



of host; or ? sphserocephalus (Pleurorhynchus) . 

 Diaphanotrplialns Dieting, 1851; ? strongylmdes, Jby page precedence, and because of 



single type host. 



Dicheilonema Diesing, 1861; ? labiatum, see p. 100. 

 Dipetalonema Diesing, 1861 ; probably candispina, see p. 100. 



Dorylaimus Dujardin, 1845; probably stagnalis, by page precedence, both sexes given. 

 Echinorhynchus Zoega, 1776; ? gadi, by elimination and page precedence. 

 Enoplostoma Marion, 1870; probably Mrtum, by page precedence, very common, both 



sexes given. 

 Enoplus Dujardin, 1845; ? tridentatus, by page precedence, partially by elimination, 



both sexes given. 



Eubostridius Greef, 1869; 1 filiformis, by page precedence, or Iphalacrus because of male. 

 Eucoleus Dujardin, 1845; probably serophilum by page precedence, and description 



more complete; Dujardin apparently took this as his type. 

 Filar if i Mueller, 1787; martis, by elimination. 

 ILrrucula Pallas, 1760, 1768; see p. 110. 

 Helmins Schlotthauber, 1860; ? paradoxus, by page precedence, also because of dubkis 



(see p. 29); probably not a valid generic name. 

 Heterodera Schmidt, 1871; not accessible to us. 

 ffisliocephalus Diesing, 1851; ? laticaudatus, by page precedence. 

 Ichthyonema Diesing, 1861; probably globiceps, by page precedence, both sexes given. 

 R'nlli-i'phalus Molin, 1861 ; probably inerm-is, by page precedence, only species figured. 

 Lttbyrinthostoma Cobb, 1898; species apparently not named. 

 Lineola Kcelliker, 1845; probably sieboldii, by page precedence, and description 



slightly more complete. 



Linguatula Schrank, 1796; probably bilinguis, by page precedence and elimination. 

 Liorhynehus Rudolphi, 1801; ? truncata by elimination, see p. 116. 

 Mastophorus Diesing, 1853; probably echiurus, because its host is so common. 

 Monopetalonema Diesing, 1861 ; ? physalurum, by page precedence. 

 Needluttnia Carus; not accessible to us. 

 Nematodum Diesing, 1861 ; see p. 122. 

 Oncholaimus Dujardin, 1845; ? atlenualus, see p. 121. 

 Oxysoma Schneider, 1866; probably brevicaudatum, by page precedence and because 



of host. 



Phanoglene Nordmann, 1840; Imicans, by page precedence. 

 Pleurorinchus Nau, 1787; [sphserocephala], seep. 180. 

 Polygordius Schneider, 1868; apparently "P. lacteus." 

 Polyporus Gruby, 1840; not accessible to us. 



Pontonema Leidy, 1855; probably vacittatum, by page precedence, abundant. 

 Proboscidea Bruguiere, 1791; seep. 131. 

 Solenonema Diesing, 1861 ; type ?. 

 S/iirnnoura Leidy, 1856; ? gracile, by page precedence. 

 S/iirnr<i E. Blanchard, 1849; probably talpic, by page precedence and because of 



Blanchard's apparent intentions; see p. 138. 



Thoracvstoma Marion, 1870; probably echinodon, by page precedence, most common. 

 Vibrio Mueller, 1773; type species very doubtful. 



CORRELATED NOMENCLATURAL QUESTIONS. 



The discussion thus far has been based upon the subject of type 

 species. During the preparation of the list, however, certain other 

 nomenclatural questions have arisen which it may be well to mention 

 briefly. 



