﻿BARTSCH] NOTES ON THE GENUS SONORELLA I'll 



Epiphragmophora hachitana (in part) Pilsbry and Johnson, Nautilus, 

 vol. xi, p. 59, 1897. 

 wrella hachitana Pilsbry, Proc. Acad. Nat. Sci. Phil'a for 1900, pp. 

 556-560, 1 90 1. 



The type (No. 130,004, U. S. Nat. Museum) and many other 

 specimens were collected by Major Edgar A. Mearns, LI. S. A., in 

 the Ilachita Grande mountains, southwestern Grant county, New 

 Mexico, at an altitude <>f X,_>ji ft. The type measures: maj. lat. 

 23.7 mm., min. lat. H).^ mm., alt. 13. _i mm.: aperture: maj. lat. u.i 

 mm., alt. 10 mm.; umbilicus about 4 mm. 



Additional localities represented by specimens in the U. S. Nat. 

 Museum are: (No. 130,005) On top of two peaks near Carrizollilo 

 Springs, at the Mexican boundary, ('.rant county, New Mexico. 

 (No. 126,596) Doubtful canon, Peloncillo mountains, southwestern 

 Grant count\. New Mexico. (No. 151,445) Chiricahua mountains, 

 northwestern Cochise county, Arizona; altitude 3,500 ft. (No. 

 105,385) Santa Rita mountains. Pima county, Arizona. (No. 130,- 

 006) Black mountains, right bank of San Bernardino river, 12 miles 

 south of boundary monument ~~, northern Mexico. 



SONORELLA NELSONI new species 

 (Plate XXXI, figure 3) 



Shell similar to 5\ hachitana Dall, but larger and more depressed, 

 with the aperture larger and more circular in outline. General col- 

 oration (our specimens appear to be bleached) flesh color, with a 

 moderately broad light-chestnut band bordered by a lighter zone on 

 each side, encircling the whorls a little above the periphery, showing 

 as a narrow 7 band above the sutures. The nepionic stage consists of 

 about one-half of a turn and is rather strongly and closely trans- 

 versely wrinkled. The neanic stage embraces about one and one- 

 half volutions and is typically sculptured, the lines of growth appear- 

 ing a little stronger and more undulated than in S. hachitana. The 

 ephebic stage consists of two and one-half moderately rounded 

 whorls, the last of which is deflected somewhat below the rounded 

 periphery at the aperture. Base of the whorls more convex than 

 the portion between the sutures. The entire surface of the ephebic 

 stage is marked by many incremental lines and a few rather narrow, 

 elongate, irregularly spaced, low subobsolete papilla? which are better 

 defined on the early portion than the last where they appear to be 

 entirely absent. Aperture large, subcircular. with the lip expanded 

 but not reflected; columella moderately expanded at base and slightly 

 reflected, but not obscuring the umbilicus, which appears open to the 



