1898.] 



NATURAL SCIENCES OF PHILADELPHIA. 



285 



SUGGESTED PHYLOGENY OP THE GENERA AND PRINCIPAL 

 SUBGENERA OF UROCOPTID^E. 



Apoma 



N. Mychostoma 



Ufoscala. 



Congylostomo Siroqhvnn 



\ BBACHYPODELLA 



Idiostemma-~^_-Arangia 



TOOCOPTIS 



ANOMA 



MACEOCEBAMUS 



CERION 



HOL0S„ B f^° B " 



„_,„ BERENDTIA 



ELOCENTRUM ' EUCALODIUM 



Anisospira 



MEGASPIEA 



EXPLANATION OF PLATES. 



Plate XVII. 



Megaspira elata Gld. Half of a transverse row of teeth 

 (the outermost marginals placed above, to the left). 

 Epirobia polygyra (Pfr.). The same, a few outermost 

 marginal teeth lacking. 



Anoma maugeri (Wood). Group of teeth from the median 

 part of the radula. 



Brackypodella (Apoma) elongata (Ch.). Half of a trans- 

 verse row of teeth. 



Urocoptis cylindrus (Ch.), very small variety from Port- 

 land, Jamaica. Half of a transverse row of teeth. 

 Anoma maugeri (Wood). A lateral tooth seen in profile. 

 Urocoptis (Maceo) interrupta (Gundl.). Section of shell. 

 Urocoptis (Tomelasmus) torquata (Morel.). Section of 

 shell. 



Urocoptis (Sectilumen) ornata (Gundl.). 

 Urocoptis (idiostemma) uncata (Gundl.). 



