NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 187 



Family Dorvilleidae Chamberlin 



The family Dorvilleidae is usually recognized through only 2 genera, 

 Dorvillea Parfitt and Ophryotrocha Claparede and Metchnikoff. Repre- 

 sentatives of this family depart widely from others of the superfamily 

 Eunicea, largely because of the great differences in their proboscidial 

 armature, their parapodial parts, and their comparatively minute size. 



These 2 genera are separable as follows. 

 1. Prostomium with conspicuous palpi and antennae, the latter 

 often distinctly moniliform, and both sometimes prolonged, ten- 

 tacular ; maxillae consist of 4 series of pieces, each with numer- 

 ous chitinous plates Dorvillea, p. 187 



1. Prostomium with greatly reduced palpi and antennae, appear- 

 ing papillar; maxillae with 2 series of pieces, each consisting of 

 less than 10 pieces; prostomium and segments with rows of cilia 

 Ophryotrocha, p. 191 



Genus DORVILLEA Parfitt 

 Type D. rubrovittata (Grube) 



Includes Anisoceras Grube (1856), Prionognathus Keferstein (1862), 

 Staurocephalus Grube ( 1855 ) , Stauroceps Verrill ( 1900) , Stauro- 

 n^rm Verrill (1900), and TelonereisYtrnW (1900). 



The rules of nomenclature dictate the use of Dorvillea Parfitt 

 (1866), since the first 3 names in the synonymy above have been shown 

 to be preoccupied and the last 3 are predated (Chamberlin, 1919, p. 339). 

 Both Staurocephalus Grube and Stauronereis Verrill have received wide 

 acceptance but should give way to Dorvillea. 



No satisfactory attempt has yet been made to divide the numerous 

 species of this genus, although Crossland (1924, p. 93) has pointed out 

 some interesting differences concerning the presence or absence of a 

 nuchal papilla and forked setae. The second appears to be of considerable 

 significance, but unfortunately this character remains unknown for some 

 species. Another significant feature concerns the presence or absence of 

 dorsal cirrophore and acicula; most species are of the first kind. 



Many species of Dorvillea have been described, or reported, from the 

 Western Hemisphere. The list below includes 20, but some are so poorly 

 known as to be unrecognizable, and some others are undoubtedly syno- 

 nyms. They are as follows : 



