SCHUCHEKT.J 



CLASSIFICATION OF TELOTKEMATA, 



125 



la. Subfamily Megathyein^ Dall, 1870 (emend Beecher, 1893). 



ArgiopidiK Kiug, 1850; Megathyridte OLhlert, 1887 ; ArgiopitUf Davidson, 1884; Argi- 



opinie Davidson, 1887. 



TerebratellidfE in which the "loop is composed of descending brandies 

 only, passing- in the highest genus through stages correlative with 

 Gwynia, Cistella, and Megatbyris. The lower genera do not complete 

 the series" (Beecher). The original stock for the two following sub- 

 families: 



Megathyris d'Orbigny, 1847. 



Argiope Deslougchanips, 1842 (not 

 Savigny and Audouin, 1827). 



Zellania IVIoore, 1854. 



Gwynia King, 1859. 

 Cistella Gray, 1850. 



la*. Subfamily Dallin^e Beecher, 1893.' 

 PlatidiiusB Dall, 1870. 



Terebratellidne with the " loop composed of descending and ascend- 

 ing lamellae, passing in the highest genera through metamorphoses 

 comparable to the adult structure of Platidia, Ismeuia, Miihlfeldtia, 

 Terebratalia, and Dallina. The lower genera, therefore, do not pro- 

 gress to the final stages" (Beecher). Keceut genera restricted to 

 boreal seas. 



Dallina Beecher, 1893. 

 Macandrevia King, 1859. 

 Terebratalia Beecher, 1893. 

 Lacqueus Dall, 1870. 



Frenula Dall, 1871. 

 Frenulina Dall, 1895. 

 Miihlfeldtia Bayle, 1880. 



Megerlia King, 1850 (not Robineau 

 Desvoidy, 1830). 



Platidia Costa, 1852. 



Morrlsia Davidson, 1852. 

 Ismenia King, 1850 (not Dall, 



1871). 

 Kingena Davidson, 1852. 



Kingia ScLoenbach, 1867. 



Trigonosemus Koenig, 1825. 



Fissurirostra d'Orbigny, 1847. 



Fissirostra d'Orbigny, 1847. 



Dolthyridea King, 1850. 

 Lyra Cumberland, 1816. 



Terebrirostra d'Orbigny, 1847. 



Eudesia King, 1850. 



Orthotoma Quenstedt, 1871. 

 Trigonella Quenstedt, 1871. 

 Flabellothyris Deslongchamps, 1884. 



Zeilleria Bayle, 1878. 

 Fimbriothyris Deslongchamps, 

 1884. 



Microthyris Deslongchamps, 1884. 



Oruithella Deslongchamps, 1884. 

 Aulacothyris Douvill^, 1880. 

 Camerothyris Bittner, 1890. 

 Epicyrta Deslongchamps, 1884. 

 Ciucta Quenstedt, 1871. // 

 Antiptychina Zittel, 1883. 

 Plesiothyris Douville, 1880. 

 ^Hynniphoria Suess, 1858. 

 Wruratula Bittner, 1890. 

 ?Orthoidea Friren, 1875. 



1 Since many of the fossil genera here referred to this family have not been studied in the light of 

 Beecher's and CEhlert's recent researches, it is not known that all belong to this boreal stock. 



