222 BUSH 



Uncini somewhat similar to those in Spirorbis ( ? ), " pectiniform with 

 numerous teeth." No figure. Operculum with shallow calcareous cap. 



(4) VERMILIA Lamarck 1818, + Philippi 1844, restricted. 



Type, V. triquetra Lamarck 1818 (non Serpula triquetra Linne"), -|- 

 Philippi 1844, figure, -f- Mdrch 1863, as V. dinema. Mediterranean Sea. 



Uncial plates not known. Operculum with elongated, somewhat cyl- 

 indrical calcareous cap, figured as not covering the entire end of the 

 operculum, thus giving the appearance of basal processes. 



(5) POMATOCEROS Philippi 1844. 



Type, P. triquetra (Linne* 1767, as Serpula, -f Leuckart 1849, as P. 

 tricuspis, non Philippi 1844, figure) Morch 1863, as first species, -f 

 Saint-Joseph 1894, figures. 1 North Sea, Atlantic Ocean. 



Uncial plates trapeziform, with pointed teeth, the lowest one larger 

 than the others. Operculum with calcareous plate bearing a cluster of 

 yellowish spines (usually three). See pL XLIV, fig. 3. 



(6) GALEOLARIA Lamarck 1818. 



Type, G. ccespitosa Lamarck 1818, -f M6rch 1863, as first species. 

 Australia, Pacific Ocean. 



Uncini unknown. Operculum with tessellated calcareous cup bearing 

 variable movable spines. 



6. Superior setae variable in form. 



(7) SPIRORBIS Daudin 1800 (see p. 236). 



Type, S. spirorbis (Linne* 1760, -f Daudin 1800, as 5. borealis) (see p. 

 262). North Sea on Fucus, Atlantic Ocean. 



Uncial plates somewhat rectangular, with rather numerous appressed 

 equal teeth. Operculum with the calcareous plate variable in form. 

 6'. Superior setae constant or uniform 7. 



7. Superior setae with posterior fin-like expansion. 



(8) FILOGRANULA Langerhans 1883. 



Type, F. gracilis Langerhans 1883, figures. Madeira, Atlantic Ocean. 

 Uncial plates similar to those in Spirorbis. Operculum with calcare- 

 ous concave cap. 

 7'. Superior setae geniculate, with numerous small spines at base of blade. 



(9) POMATOSTEGUS Schmarda 1861. 



Type, P. stellata (Abildgaard 1789, figures, as Terebclla} Schmarda 

 1861, as P. macrosoma, figures, -f Morch 1863, -j- Baird 1865, 4- Bene- 

 dict 1886, figures. West Indies, Atlantic Ocean. 



Uncial plates tetragonal, with numerous pointed teeth, the lowest one 

 larger, blunt and more conspicuous than the others. Operculum con- 

 sisting of a number of separate calcareo-chitinous or horny plates joined 

 by a central axis in the form of a pyramid. 



(10) SPIROBRANCHUS Blainville 1817. (Cymospira Savigny 1809, -J- Blainville 



1828.) 



Type, 5. giganteus (Pallas 1766, figures, as Serpula, -f Blainville 1828, 

 figures, as Cymospira}, Morch 1863, figures, + Ehlers 1887, figures. 

 West Indies, Atlantic Ocean. 



1 In the series of specimens from Denmark, in the Yale Museum, some of the 

 opercula have apparently lost the spines, which are replaced by a conspicuous 

 node of calcareous deposit. The collar setae are small and few in number. 



