TABLE OF CLASSIFICATION. 



CLASS BRACHIOPODA. 



Pateeina,* Beecher, 1891. 



Sub-class INARTICULATA, Huxley; LYOPOMATA, Owen. 

 Order Mesocaulia, or Lingulacea, Waagen. 



Family OBOLIDJE, King. 



Obolella, Billings, 1861. 

 Discellomus, Hall, 1871. 



Obolus, von Eichwald, 1829. 



Ungy.la, Pander, 1830. 



Ungulites, Bronn, 1848. 

 Aolonotreta, Kutorga, 1848. 



Acritis, Volborth, 1869. 

 Schimidtia, Volborth, 1869. 

 MiCKWiTziA, Schmidt, 1888. 

 Spondvlobolus, McCoy, 1852. 



Elkania, Ford, 1886. 



Billingsia, Ford, 1886. 

 Botsfordia, Matthew, 1893. 

 Neobolus, Waagen, 1885. 

 Monobolina, Salter, 1865. 



Family LINaVLIDM, Gray. 



LiNGULA, Bruguiere, 1792. Leptobolus, Hall, 1871. 



Pharelra, Bolten, 1798. Glossina, Phillips, 1848. 



Lingularius, Dum6ril, 1806. Dignomia, Hall, 1871. 



* ITje genua Patkrixa, representing, according to oui- present knowletlge, the fundamental stock or 

 radicle of all the Brachiopods, might be embraced by some of the primitive familie.s, both of the Inarticu- 

 la'a and the Arliculata. By placing it in this arrangement, outside both the gi-eat sub-classes, it is the 

 purpose to express the fact that the genus belongs as much to one as to the other, and that it is actually 

 beyond the pale of both as it has not assumed the differential characters of either. 



