Report of the State Geologist, 



165 



the Genera of the Palaeozoic Brachiopoda," a work not conceived 

 upon the plan of any of its predecessors, but designed to set 

 before the student the present condition of our knowledge of 

 these genera, with such discussions and illustration as will serve 

 most to clearly indicate what progress has been made in our 

 knowledge of these organisms and in what directions much still 

 remains to be done. 



In the preparation of this work every effort has been made to 

 bring under close and careful scrutiny all obtainable material 

 representing the Brachiopoda. The collections of no single insti- 

 tution or individual could furnish the specimens requisite for this 

 undertaking, and recourse has been had to all sources of material 

 within reach. The collections of private individuals as well as of 

 public institutions have been placed at the disposal of the work, 

 and but for such aid it could not have been presented in a creditable 

 form. 



In the body of the work all the palaeozoic genera of the 

 Inarticulate Brachipoda are discussed, and of the Articulate 

 genera, the Orthoids, Strophomenoids, Leptaenoids and Produc- 

 toids. The remaining Articulate genera will be considered in 

 the second part of this work. The following list of titles, with 

 reference to the pages of the volume, will indicate the subject- 

 matter. In this list, names of subgeneric value are inset under 

 their proper capital, and undoubted s^Tionyms are in italics. 



PAGE. 



I. Brachiopoda Inarticulata. 



1-184 



1. Lingula Bruguiere, 1789 2-18 



Pharetra, Bolten, 1798. 

 Lingularius, Dumeril, 1806. 



2. Glottidia, DaU, 1870.... 14 



3. Dignomia, HaU, 1871..14, 15 



4. Glossina, Phillips, 1838. . 15 



5. Lingulops, HaU, 1871 18-24 



6. Lingulasma, Uhich, 1889 . . . 24-28 



7. Lakhinma, (Ehlert, 1887 .... 28-30 

 Davidsonella, Waagen, 1885. 



8. TrimereUa, Billmgs, 1862 . . . 33-36 

 Qotlandia, DaU, 1870. 



9. Dmobolus, HaU, 1871 36-40 



Conradia, vKaXl, 1872. ? 



10rMon6merella,;Bilhngsri871. . 40^ 



11. Ehinobolus, HaU, 1871 44-46 



Obolellina, BiUings, 1871. 



12. Lingulella, Salter, 1866 55-59 



13. Lingulepis, HaU, 1863 59-62 



14. Barroisella, nov 62-64 



15. Tomasina, nov 65 



16. Obolella, BUlings, 1861 66-73 



Dicellomus, HaU, 1871. 



17. Leptobolus, Hall, 1871 73-75 



18. Elkania, Ford, 1886 75-78 



Billingsia, Ford, 1886. 



19. Patemla, Barrande, 1879. . . . 78-79 



20. Oboliis Eichwald, 1829 80, 81 



Ungula, Pander, 1830. 

 Ungidites, Bronn, 1848. 



21. Aulonotreta, Kutorga, 1848... 82 

 Acritis, Volborth, 1869. 



