14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



Through necessity the circles denoting locaHties are drawn larger than 

 the actual scale size of the localities in order that they may be seen. 



All shells collected prior to 1932 were live shells. After 1932 the 

 lots contained live and dead shells. The majority of shells measured 

 were live specimens. 



In the list of localities found with each subspecies, all lots contain- 

 ing less than five adult specimens have the number of dextral and 

 sinistral specimens enumerated. If the number of adults in a lot is 

 five or more, the number of dextrals and sinistrals, the length range, 

 and the mean length of the shell are given in table 2, p. 15. All 

 locality place names in the text are put in boldface type. In the 

 Gulick lots only the type locality or localities which probably con- 

 tained the subspecies are put in boldface type. Other localities which 

 I consider doubtful are put in ordinary type. 



When material is quoted under each form, the catalog numbers of 

 the lot are quoted only when necessary. Most of the Meinecke, Russ, 

 Cooke, and Lemke material has locality numbers, and is sufficiently 

 distinct so as not to require the quotation of catalog numbers. All 

 lots labeled Cooke, stand for Dr. C. M. Cooke. All lots not having 

 locality numbers have catalog numbers given. The Gulick lots have no 

 catalog numbers given because the Gulick lots have been selected 

 from lots containing a mixture of color forms or subspecies and are 

 not yet recataloged. However, the catalog numbers of the figured 

 shells are given in the explanation of plates. 



Methods of collecting material and recording localities on map 

 tracings taken from the United States Geological Survey topographic 

 advance sheets, the manner in which the shells are graded into length 

 groups (table 2, p. 15), and the selecting of the typical or usual form 

 of the shell are the same as those already described for A. miistelina 

 (Welch, 1938). The only addition that should be made is the method 

 of counting the number of whorls, which is the same as that de- 

 scribed by Pilsbry (1939, p. xi). All holotypes of new subspecies 

 have the usual form and color pattern of the shell unless otherwise 

 stated. 



All grading of shells into length groups for table 2, page 15, was 

 done by two W. P. A. workers. Many of the lots were remeasured 

 by me and found to be correct. Since the shells are all graded by the 

 measuring rod described for A. inustelina (Welch, 1938, p. 12), I 

 think there is little chance of error as far as has been ascertained 

 from remeasuring lots here and there at random. 



