148 On the Genera of Steplianoceras and Allies. 



Genus Baculatoceras, Mascke. 



"Type, Am. haculatus, Qu." 

 7 species, of wliicli 4 are new. 



Genus Apsorroceras, Hyatt. 



''Type, Ham. haculatus, Qu." 

 No record. 



Family Stephanoceratidae (Zittel), era. Mascke. 

 Genus Emileia, Buckm. 



" Type, [A.] brocchu, Sow." 

 11 species, of which 7 are new. 



Genus Chondroceras, Mascke. 



" Type, Am. gervillei. Sow." 



41 species, divided into 6 groups, only 1 species yet 

 described. 



Genus Sph^roceras (Bayle), em. Mascke. 



" Type, Am. hrongniarti, Sow." 

 7 species, of which 6 are new. 



Genus Stephanoceras (Waagen), em. Mascke. 



" Type, Am. Humphr. mutabilis, Qu/' 



25 species, of which 21 are new. 



The generic name is preoccupied for Rotifers. 



Genus Stepheoceras, Buckm. 



"Type, Am. Jiumpliriesi[anus'], Sow." 

 16 species, of which 12 are new. 



Genus Garantiana, Hyatt. 



"Type, A7)i. ga}-anti[anus'], d'Orb." 



15 species, of which 13 are new. 



This genus is really new. Hyatt cited it as Siemiradzki's, 

 but that author did not name it. Mascke gives the history 

 of its origin. 



Genus Subparkinsonia, Mascke. 



"Type, Sicbp. divisa, n. f." 

 3 species, of which all are new. 



