354 



GENERAL SUMMARY TO 



Sub-Families and Genera. 



Palaeozoic. 



I. Family TeeEBBATULACEA {continued) 



7. Sub-Family STBINGO- 



cephalice. 

 Loop circular, not reflexed 



1 Stri 

 f 182' 



ngocepbalus, Defrance, 

 1827 



The sub-fatuily to which these 

 genera should be referred not 

 yet satisfactorily determined. 



8. Sub-Family Abgiopids:. 



? Hinniporia, Suess, 18(52 



? Platidia, Costa, 1852... 

 ? Gwyuea, King, 1859 .... 



Deslongchamps, 1842 



Gray, 1853 



ania, Moore, 1854. . . . 



f Argiope, 

 \ Cistella, 

 [ ? Zellani 



II. Family Thecideid^:, Gray, 1840, 

 1. Sub-Family THEOINID^ 



2. Sub-Family Lyttoniinji. 



1 Thecidium, Defrance, 1828 

 J Pterophloios, Gumbel, 1861 



"1 Lyttonia, Waagen, 1883 ... 

 J Oldhainimi, Waagen, 1883 



III. Family Spieifeeacea. 



C A. Shell-structure fibrous. 



Spirifera, Sow., 1815 



Cyrtia, Dalman, 1828 



B. Shell-structure perforated. 

 Syringothyris, Winchell, 1863 



Cyrtina, Davidson, 1858 



Reticularis M'Coy, 1844 



Martinia, M'Coy, 1844 



Martiniopsis, Waagen, 1883... 



Spirifcrina, d'Orb., 1847 



Mentzelea, Quenstedt, 1871 ... 



Ainboccelia, Hall, 1860 



_ Suessia, Deslongchamps, 1854 



Sub-family not yet quite certain — ? Uncites, Defrance, 1825. 



f Nucleospira, Hall, 1859 . 



| Retzia, King, 1850 



2.£«J--Fam?7i/Ni7CLEOSPiBiD.E. «{ Meristina, -ff«Z/, 1867 .... 



| ?Eumetria,ira//,jraa^e»,1864 

 L ? Trematospira, Hall, 1857 



L. Sub-Family Spieieeeinid*. 



The basis of spirals facing the 

 centre, with their apices 

 having a more or less upward 

 direction towards the poste- 

 rior angle of the lateral mar- 

 gins of the shell. 



3. Sub-Family Athteid*:. 



4. Sub-Family ATRYPina;. 



r Athyris, M' Coy, 1844 



Spirigerella, Waagen, 1883 . 

 | Kayseria, Davidson, 1882.... 

 <i Merista, Suets, 1851 



Meristella, Hall, 1859 



Whitfieldia, Dav., 1882 



Bifida, Dot., 1882 



f Atrypa, Da/man, 1828 .... 



| Ccelospira, Hall, 1863 



<{ ? Thecospira, Zugmayer, 1 - 1880 



| Zigospira, Hall, 1862 



L Glassia, Dav., 1882 



The Sub-Family in which Thecospira and Davidsonia should be placed is not quite certain. 



