KEY TO UROCOPTID^:. 



Genus Holospira (continued) Subg. Metastoma Streb. 

 Subg. Haplocion Pils. Subg. Ccelostemma Dall. 



Genus Epirobia Strebel. 



Subfamily MICROCERAMIN^: Pils. 



Genus Microceramus Pils & Van. 

 Subgenus Spiroceramus Pils. & Van. 



Subfamily UROCOPTIN^: Pils. 

 (Serrate- or notch-toothed series.) 

 Genus Spirostemma Pils. & Genus Anoma Alb. 



[Van. Genus Macroceramus Gldg. 



(Entire-toothed series.) 



Genus Urocoptis Beck. Sect. Gongylostoma s. str. 



Subg. Urocoptis. Sect. Tomelasmus P. & V. 



Sect. Bactrocoptis Pils. Sect. Tetrentodon Pils. 



Sect. Spirocoptis Pils. Genus Pineria Poey. 



Subg. Arangia P. & V. Genus Brachypodella Bk. 



Subg. Idiostemma P. & V. Subg. Brevipedella Pils. 



Sect. Maceo P. & V. Subg. Amphicosmia P. & V. 



Subg. Autocoptis Pils. Subg. Stropkina Morch. 



Subg. Cochlodinella P. & V. Subg. Liparotes Pils. 



Subg. Gongylostoma Alb. Subg. Siphonolamus Pils. 



Sect. Fibricutis Pils. Subg. Gyraxis Pils. 



Sect. Sectilumen P. & V. Subg. Brachypodella s. str. 



Sect. Esochara P. & V. Sect. Brachypodella. 



Sect. Pycnoptychia P. & Sect. Geoscala P. & V. 



[V. Sect. Simplicervix Pils. 



Sect. Paracallonia Pils. Subg. Mychostoma Alb. 



Sect. Callonia C. & F. Subg. Apoma Beck. 



Sect. Liocallonia Pils. 



The first of the two keys following is based upon natural 

 characters; the second is partly artificial, taking shell char- 

 acters only into account. 



Analytical Key to Genera. 

 I. Radula of the ordinary shape, the teeth arranged in nearly 



