FLABELLIGERIDAE. 397 



ee. Notopodial setae in part capillary and finely biserrate, or plumose, and in part bidentate 



crochets Pantoithrix, gen. nov.' 



dd. Papillae not filamentous and dense, mostly shorter, coarser, and fe%^er, and sometimes 

 sparse and inconspicuous. 

 e. Setae all capillary in both neuropodia and notopodia, or rarely a few small crochets in a 

 few of most caudal somites only. 

 Branchiae few, definite, typically eight in number, with four long and four short, elevated 



above the tentacles Saphohranchia, gen. nov.^ 



ee. Crochets present in the neuropodia, or in all excepting the most anterior. 

 /. Crochets on certain somites (in the genotype V-VIII) composite. 



Conspicuously constricted between the second and third setigerous somites. 



TherocJiaeta, gen. nov.' 

 //. Crochets all simple. 



g. Crochets with a distinct subapical spur or spine. 



Branchiae numerous, in a U-shaped group Balanochaeta, gen. nov.* 



gg. Crochets all with tips entire, no spur or subapical process. 



h. Branchiae eight or ten arranged in two equal and parallel rows, one behind the other 



and caudad of tentacles Flemingia Johnston.^ 



hh. Brancliiae numerous, short and equal. 



i. Borne upon the anterior surface of a membranous lobe vertically elevated caudad 



of the tentacles Semiodera, gen. nov." 



ii. Borne upon the edge of a membranous rim in a U-shaped group. 



Stylariodes DeUe Chiaji.' 



Synonymy of Genera. 



In tliis tabulation of genera it has been impossible to make sure that all 

 species that have been described are included, because of the meagreness of many 

 accounts. However, it has seemed best so far as possible to break up the mani- 

 festly heterogeneous assemblage of species that have been accumulated under 

 Stylarioides along Unes suggested by Marenzeller and St. Joseph, since accumu- 

 lating evidence shows that these groups are natural as well as convenient. 



Reexamination is necessary to remove all doubt as to the status of Zorus 

 Webster and BenecUct. 



The name Trophonia is still often used either in the same sense as Stylari- 

 oides, or to designate a different but closely related group of species. The name, 

 however, cannot be used since T. barbata Audouin and Milne Edwards (Cuvier) , 

 its type-species, is a synonym of S. moniliferus Delle Chiaji, the type of Stylari- 

 oides. Pherusa Oken, from which the family has sometimes been called the 

 Pherusidae, cannot be used for this genus because the name is preoccupied in 

 the Crustacea. 



' Genotype, Pherusa chilensis Schmarda. Trac/oios, of all sorts, and 9pi|, hair. 



- Genotype, Stylarioides longisetosa Marenzeller. aa<t>ii%, distinct, definite, and ppdyxi-a, gill. 



'Genoty'pe, Stylarioides collarifer Ehlers. daipos hinge, articulation, and x"''"'!, seta. 



■•Genotype, Trophonia eruca Claparede. paXavos, a clasp or snap, and xairi?, seta. 



^ Genotype, F. muricata Johnston (F. plumofia Miiller). 



'Genotype, Siphonostoma cariboum Grube. a-qfiaia, a standard, and &ipri, neck. 



' Genotype, S. monilijerus Delle Chiaji. 



