332 Forty-fifth Report on the State Museum. 



PAGE. 



22. Monobolina, Salter, 1865 83, 84 



23. Neobolus, Waagen, 1885 84 



24. Spondylobolus, McCoy, 1853 85 



25. Mickwitzia, Schmidt, 1888 , 86, 87 



26. Schizobolus, Ulrich, 1886 87-90 



27. Discinolepis, Waagen, 1885 90 



28. Kutorgina, Billings, 1861 '. 90-94 



29. Schizopholis, Waagen, 1885 94, 95 



30. Volborthia, Von Moller, 1873 95, 96 



81. Iphidea, Billings, 1872 97, 98 



32. Acrothele, Linnarsson, 1876 98-101 



33. Acrotreta, Kutorga, 1848 101-104 



34. Conotreta, Walcott, 1889. 104, 105 



35. Discinopsis (Matthew) gen. nov 105, 106 



36. Linnarssonia, Walcott, 1886 107-109 



37. Mesotreta, Kutorga, 1848 109 



38. Siphonotreta, de Verneuil, 1845 110-113 



39. Schizambon, Walcott, 1884 113-117 



40. Keyserlingia, Pander, 1861 117-119 



41. Helmersenia, Pander, 1861 119 



Discina, Lamark, 1819; Orbicula, Sowerby, 1822; 42. Orbiculoidea, 



d'Orbigny, 1847; 43. Schizotreta, Kutorga, 1848; Orbiculoidea, 

 Davidson, 1856; Discinisca, Dall, 1871; 44, Lindstroemella, sub-gen. 

 nov.; 45. CEhlertella, sub-gen. nov.; 46. Roemerella, sub-gen. nov.; 

 Discina, of Authors 120-137 



47. Trematis, Sharpe, 1847 138-142 



Orbicella, d'Orbigny, 1847. 



48. Schizocrania, Hall and Whitfield, 1875 142-144 



49. Crania, Retzius, 1781 145-151 



Choniopora, Schauroth, 1854. 



Pseudocrania, McCoy, 1851 : 151 



50. Palaeocrania, Eichwald, 1860 152 



51. Craniella, CEhlert, 1888 153 



52. Cardinocrania, Waagen, 1885 154 



53. Pholidops, Hall, 1859 155-159 



Craniops, Hall, 1859. 



Note on Orbiculoidea 160 



Conclusion 161-170 



Supplement to the Brachiopoda Inarticulata : 



Descriptions of New Species referred to in the preceding pages 

 or on the accompanying plates. 



PAGE. 



(! ) Lingula compta 171 



(2) L. scutella 171, 172 



(3) L. flabellula 172 



(4) L. paracletus 172 



