THE NAUTILUS. 



55 



way a number of other papers upon the same group published by 

 Dr. Dall and myself, as well as some of her own and of Prof. Ver- 

 rill's works upon the family. 



In this contribution quite a number of facts are presented, which 

 are at variance with the data at my disposal. I am forced to pub- 

 lish the following notes in order that there may be no misunderstand- 



ins. 



It is a great pity that Dr. Bush did not publish the manuscript 

 she prepared in 1896. As it is, the MS. names have no standing 

 and cannot enter into the discussion of the present work. 



I was not aware that Dr. Bush was working upon this group at 

 the time 1 prepared my manuscript, her last publication upon it hav- 

 ing appeared nine years ago, nor was I aware that Dr. Bush had seen 

 Mr. Winkley's material, which was incorporated in my report, as 

 was implied in her review. I wish likewise to disclaim any intended 

 discourtesy in not acknowledging Dr. Bush's work in my intro- 

 duction, for I considered both of her papers as extralimital. The 

 one dealt with Carolinian, Floridian, West Indian and South Amer- 

 ican species (with a reference to Turhonilla interrupta Totten); the 

 other with Bermudan forms. 



The matter of classification is so fully discussed in the monograph 

 on the West American Pyramidellidae by Dr. Dall and myself now 

 going through the press, that I shall not refer to any of the state- 

 ments concerning it here, but will refer any one interested in the 

 subject to the forthcoming volume. I will say, however, that 

 Pyrgostelis (which has no standing) was never used by us, Dr. Bush 

 notwithstanding, and that Triptychus and Peristichia are Pyramidel- 

 lid ; they have a sinistral nucleus and columellar folds, the family 

 characters of the group. Here also I may say that Dr. Bush is in 

 error when she states that Dr. Dall and myself furnished the text on 

 the mollusks in Dr. Arnold's paper on the Paleontology and Strati- 

 graphy of the marine Pliocene alid Pleistocene of California : Mem. 

 Cala. Acad., Ill, 1903. We contributed only that part which deals 

 with the Pyramidellidge. 



I believe that all of the present differences of opinion could have 

 been avoided if Dr. Verrill had yielded to my request and had sent 

 me specimens of what he considered typical representatives of 

 some of the older species as well as some of those described by him- 

 self. All of the early collections of northeastern American marine 



