THE NAUTILUS. 



The answer to that is that Bourguignat twice explicitly 

 stated that cumingianus was the type of Ancylastrum, I can- 

 not see how we can go behind his positive statement and argue 

 that he meant something else. The fact that in 1864 he men- 

 tions cumingianus and fluviatilis as "examples" of Ancylas- 

 trum has no bearing on the validity or intention of his orig- 

 inal designation. If this can be done, all of the older desig- 

 nations of typical species can be overthrown. 



III. That when cumingianus was designated as the type in 

 1853 it had not been described and therefore could not be so 

 used. 



This has been answered by my paragraph II. 



CONCLUSION. 



Ancylus cumingianus Bgt. is the type of Ancylastrum by 

 designation and consequently that name cannot be used for 

 the European group typified by A. fluviatilis Mull. 



ANCTJLOSAE NORTH OF THE ALABAMA DRAINAGE. 



BY CALVIN GOODRICH. 



Work upon the Alabama drainage Anculosse collected by 

 Herbert H. Smith, compelled a more or less thorough stu<fcr 

 of the species and forms which occur in other parts of the 

 country. I submit the impressions and conclusions for what 

 they are worth, realizing that a painstaking examination 

 might greatly modify my present views. 



Group of Anculosa carinata (Brug.). 



1 A. CARINATA (Brug.), 1792. 



Synonyms: Paludina dissimilis Say, 1819; Anculotus ni- 

 grescens Conrad, 1834; Anculotus monodontoides Conrad, 

 1834; Anculotus dentatus Couthouy, 1839; Anculosa carinata 

 Lea, 1841; Anculosa dentata Lea, 1841; Anculosa variabttis 

 Lea, 1841; Anculotus carinatus DeKay, 1843; Anculotus tri- 

 vittata DeKay, 1843. 



Some of these may deserve recognition as local races. 



