284 



PROCEEDINGS OF THE ACADEMY OF 



[1898. 



Megaspira was placed in the vicinity of Clausilia by Deshayes, 

 who thought the internal structure indicated the presence of a clausi- 

 lium. This inference does not seem justified by the facts of the case, 

 though we are far from denying its possibility ; our specimen with 

 the soft parts dried in shows no trace of a clausilium. Upon the 

 whole, it would appear that Megaspira is an aberrant member of the 

 Urocoptidai, nearest perhaps to Eucalodium among existing genera. 



The South African genus Coelaxis and the Papuan and Australian 

 Perrieria are somewhat similar to the foregoing American genera, 

 but are doubtless correctly referred to Pupidce, near Clausilia. Per- 

 rieria has a complicated internal armature, only partially worked 

 out by Fischer. 



The Colombian Rhodect is probably referable to the Achatinidce, 

 grouping near Subulina Beck (type S. octona). 



TABLE SHOWING GEOSRAPHIC DISTRIBUTION OF THE UROCOPTID.E. 



Genus Urocoptis 



Section Urocoptis (restricted). 



Section Cochlodinella, 



Section Spirostemma 



Subgenus Arangia 



Subgenus Idiostemma. 



Section Maceo 



Subgenus Gongyiostoma 



Section Pycnoptychia. 



Section Callonia 



Section Sectilumen 



Section Esochara 



Section Gongyiostoma (s.s.).... 



Section Amphicosmia 



Section Tomelasmus 



Genus Brachypodella 



Section Brachypodella (s.s.)... 



Section Strophina 



Section Geoscala 



Section Mychostoma 



Section Apoma 



Genus Epirobia ■ 



Genus Holospira 



Genus Macroceramus 



Genus Anoma (Lia) 



Genus Eucalodium 



Genus Coelocentrum 



Genus Berendtia 



Genus Cerion 



03 

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