APPENDIX. 



GASTROCOPTA PERVEKSA (Sterki). PL 46, fig. 13. 



Page 40. Several dextral specimens were found in the drift 

 debris of the Salt River, Tempe, Arizona, by Ferriss, Daniels 

 and Pilsbry in 1910. The normal form occurs in the same 

 deposit. We do not know whether these represent a dextral 

 colony or race, or are merely "accidental," but in consider- 

 able lots from other localities gone over, all are sinistral. 

 These dextral shells may be known as G. perversa, form sana 

 (pi. 46, fig. 13). 



GASTROCOPTA PROCERA DUPLICATA Sterlri (p. 65). 



This name being preoccupied, becomes G. p. sterkiana Pils. 



(p. 127). 



GASTROCOPTA WOLPII (Miller). Page 94. 

 GASTROCOPTA MUNITA (Reibisch). Page 96. 



In Proc. Biological Soe. Washington, vol. 30, p. 10, Jan. 22, 

 1917, Dr. Dall writes : 



"Paul Reibisch described a species of Pupilla under the 

 name of ivolfi which he supposed to be the same as the P. wolf, 

 of Miller, originally from Guayaquil on the mainland. Dr. 

 Pilsbry informs me that the Galapagos species is not the same 

 as the continental wolfi, and therefore I propose for it the 

 specific name REIBISCHI. Reibisch 's P. clausa and P. munita 

 seem sufficiently distinct." 



The facts appear to be: Herr Reibisch did not describe 

 Pupill-a wolfi, but he figured a specimen of Pupa ivolfii Miller, 

 from the Province of Guayaquil, for comparison with his new 

 Pupa munita from the Galapagos. There appears to be no 

 reason for doubting, and I have never doubted, that Pupa 

 ivolfii Miller was correctly identified by Reibisch. 



(357) 



