SABELLIDES AND SERPULIDES 223 



Uncial plates tetragonal, with somewhat irregular, pointed teeth, the 

 lowest one larger than the others, often blunt, twisted. Operculum with 

 a calcareous plate bearing a cluster of branching spines. i 



8. Collar setae present 9. 



8''. Collar setae absent. 



(11) Rhodopsis gen. nov. (see p. 179 and Addendum). 



Type, R. pusillus sp. nov. Bermuda, Atlantic Ocean. 



Uncial plates tetragonal, with appressed teeth, the lowest larger than 

 the others. Operculum with a chitinous or horny disk covered with 

 horny spines in the form of a rosette. 



9. Superior setae on collar not simple tapered blades 10. 



9''. Superior setae on collar simple tapered blades. 



' (12) Vermiliopsis Saint-Joseph 1894. * 



Type, V. 7nultivaricosa (Morch 1863, as Vermilia, + Marenzeller 1893, 

 as Vermilia, figures) Saint-Joseph 1894, restricted. Mediterranean Sea. 



Uncial plates tetragonal, with appressed rather blunt teeth, the lowest 

 larger and more conspicuous than the others. Operculum with horny 

 cap. 

 * (13) Paravermilia gen. nov. Csee p. 221). 



Type, P. bertnudensis sp. nov. Bermuda, Atlantic Ocean. 



Uncial plates somewhat rectangular, with appressed teeth, the lowest 

 large and blunt. Operculum with horny cap often resembling a little 

 spiral shell. 



* (14) Metavermilia gen. nov. (see p. 220). 



Type, M. multicristata (Philippi 1844, figure, as Vermilia, ■\- Langer- 

 hans 1883, as Vermilia multicostata and Vermilia clavigera, figures, -\- 

 Marenzeller 1893, as Vermilia, figures). Mediterranean Sea. 



Uncial plates trapeziform, with long slender teeth, the lowest longer 

 than the others. Operculum Avith a conic horny cap. 



• (15) Hyalopomatus Marenzeller 1878. 



Type, H. claparedii Marenzeller 1878, figures. Arctic Ocean, off 

 Nova Zembla, in about 125 fms. 



Uncial plates tetragonal, with numerous appressed teeth, the lowest 

 very long and fang-like. Opercula membranous.'' bulb with central air- 

 chamber. (The figure shows distinct cell structure.) 

 . (16) DiTRYPA Berkeley 1S32-4.* 



Type, D. arietina (Miiller 1776) Berkeley 1832-4, -f M. Sars 1835, 

 figures, + Saint-Joseph, 1898. Shore of Norway, Atlantic Ocean. 



Uncial plates somewhat similar to Spirobranchus. Operculum with 

 flat horny plate ornamented with striae. 

 '(17) Janita Saint-Joseph 1894. 



Ty^^e, J. Jimbriata (Delia Chiaji 1828, as Serpula, figures, -f Philippi 

 1844, as Placostegus,"^ figure, -(- Morch 1863, -j- Langerhans 1S83, as 



"^Vermilia agglutinata Marenzeller 1893, figures, is a Vermiliopsis. 



^Berkelev's- species was D. subtilata (figures) and Sars' species, D. libera. 



'Philippi described the operculum as having a calcareous plate, which is fig- 

 ured as a simple disc, not at all like Langerhans' figure. Future study may 

 prove the two forms to be distinct species. 



