224 BUSH , 



Omphalofoma sptnosa, figures, -j- Marenzeller 1S93, as Omphalopoma, 

 figures) Saint-Joseph 1894. Mediterranean Sea. 



Uncial plates rhomboidal, with appressed teeth, the lowest long and 

 blunt. Operculum with concave hornj cap. 

 10. Superior setae with posterior fin-like expansion. 

 •.(18) Omphalopoma Morch 1863.1 



Type, O. umbilicata Morch 1863. Philippine Islands, Pacific Ocean. 

 Uncini unknown. Operculum with a concave hornj cap. 

 fc (19) Hyalopomatopsis Saint-Joseph 1894. 



Type, H. marenzelleri (Langerhans 1883, figures, as Hyalopomatus\ 

 Saint-Joseph 1894. Madeira, Atlantic Ocean. 



Uncini somewhat similar to Spirorbis, the teeth longer. Operculum 

 with a chitinous or horny cap. 

 s (20) Chitinopoma Levinsen 1883.* 



Type, C. greenlandica (Malmgren 1867, as Hydroides) Levinsen 1883, 

 figures, as C. fabrtcii. Greenland, North Atlantic Ocean. 



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

 the others. Operculum with concave horny plate. 

 \(2i) Omphalopomopsis Saint-Joseph 1894. 



Type, O. langerhansi (Marenzeller 1884, as Omphalopoma, figures) 

 Saint-Joseph 1894. Japan, Pacific Ocean. 



Uncial plates trapeziform, with comparatively few pointed teeth, 

 the lowest large and blunt. Operculum with concave horny plate. 

 10''. Superior setae geniculate, with conspicuous spines at base of blade. 

 ^ (22) Serpula Linnd 1767, -|- Philippi 1844. 



Type, 5". vermicularis (Ellis 1755, figures, as Tubus) Linnd 1767,-}- 

 Saint-Joseph 1894, figures. North Atlantic Ocean. 



Uncial plates tetragonal, with few unequal coarse serrations. Primary 

 operculum funnel-shaped, with numerous radii forming serrations on 

 margin ; secondary operculum usually club-shaped, occasionally like 

 primary one. 



> (23) SCLEROSTYLA Morch 1863. 



Type, 5. ctenactis Morch 1863. St. Thomas, West Indies, Atlantic 

 Ocean. 



Uncini like Serpula. Operculum with comparatively few radii form- 

 ing a scalloped margin ; intermediate between Serpula and Cructgera, 

 It is described by Morch as calcareous. 

 ^(24) ZoPYRUS Kinberg 1866. 



Type, Z. loveni Kinberg 1866,* as first species. Straits of Magellan, 

 Island of Bucket, Pacific Ocean. 



Uncial plates unknown. Opercula funnel-shaped and club-shaped. 



^ Saint-Joseph (1894) restricted this genus to O. cristata Langerhans (1883), 

 figures, from Madeira, which has a thin concave horny plate in the operculum 

 and uncini somewhat similar to those in Spirorbis. 



^Vermilia serrula Stimpson 1853, -f- Verrill 1885, figure, from Grand Manan, 

 New Brunswick, appears to be synonymous with this species. 



'As no figures of this species seem to have been published, very little definite 

 knowledge is available by which to determine the correct position of the genus ; 

 Ehlers 1901 placed it next to Serpula, 



