KEY TO UROCOPTID^E. 



xxxi 



Genus Holospira (continued) 

 Subg. Haplocion Pils. 



Subg. Metastoma Streb. 

 Subg. Ccclostcmma Ball. 

 Genus Epirobia Strebel. 



Subfamily MICROCERAMIN.E Pils. 



Genus Microceramus Pils & Van. 

 Submenus 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. 

 Subg. Urocoptis. 



Sect. Bactrocoptis Pils. 



Sect. Spirocoptis Pils. 

 Subg. Arangia P. & V. 

 Subg. Idiostemma P. & V. 



Sect. Maceo P. & V. 

 Subg. Autocoptis Pils. 

 Subg. Cochlodinella P. & V. 

 Subg. Gongylostoma Alb. 



Sect. Fibricutis Pils. 



Sect. Sectilumen P. & V. 



Sect. EsocJiara P. & V. 



Sect. Pycnoptychia P. & 



[V. 



Sect. Paracallonia Pils. 



Sect. Callonia C. & F. 



Sect. Liocallonia Pils. 



Sect. Gongylostoma s. str. 



Sect. Tomelasmus P. & V. 



Sect. Tetrentodon Pils. 

 Genus Pineria Poey. 

 Genus Brachypodella Bk. 

 Subg. Brevipedella Pils. 

 Subg. Amphicosmia P. & V. 

 Subg. Strophina Morch. 

 Subg. Liparotes Pils. 

 Subg. Siphonoltzmus Pils. 

 Subg. Gyraxis Pils. 

 Subg. Brachypodella s. str. 



Sect. Brachypodella. 



Sect. Geoscala P. & V. 



Sect. Simplicervix Pils. 

 Subg. Mychostoma Alb. 

 Subg. Apoma Beck. 



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 



