118 BULIMULUS-NAESIOTUS. 



lected by Wolf were more or less immature, the original diagnosis 

 needs some additional data. 



" I have figured several specimens to show the variations of form 

 and sculpture. When mature the shell always has a pretty solidly 

 thickened peristome. The young are more translucent and show 

 projecting points of epidermis along the minute granular spiral lines, 

 as in B. unifasciatus, and like that species show a distinct peripheral 

 paler band " (Dall). 



B. BAURI Ball. PI. 23, fig. 31. 



Shell small, short, stout, with a dark, rapidly attenuated spire, 

 distinct suture, and opaque yellow-brown last whorl ; whorls about 

 seven, the earlier ones dark livid purple with straw colored streaks, 

 paler at the suture, rude, wrinkled and malleated ; last whorl in- 

 flated, more or less wrinkled transversely, somewhat shining; um- 

 bilicus closed or a mere chink. 



Aperture subquadrate, angulated behind and at the base of the 

 pillar; pillar short, oblique ; lips simple, thick, especially across the 

 body where the callus has a raised edge ; throat white. Length of 

 shell 10, of aperture 4'5 ; diam. of shell 6'5 mill. 



Hibernating on the under side of leaves of plants at the southwest 

 end of Chatham Island, 1,600 feet above the sea (Dr. Baur). 



Bulimulus (Ncesiotus) Bauri DALL, Nautilus, VII, p. 54, Septem- 

 ber, 1893; Proc. A. N. S. P., 1896, p. 441, pi. 15, f. 12; pi. 17, f. 7, 

 15 (jaw and teeth). 



"This is a very distinct little species, with a pale yellow-brown 

 body whorl darkening toward the tip of the spire, with conspicuous, 

 lighter transverse wrinkles on the upper whorls, and fine ribbing on 

 the nepionic shell which is of a livid purple, almost black. In speci- 

 mens which have survived hibernation, the aperture is usually pro- 

 duced, contracted and conspicuously thickened. Many specimens 

 have a narrow, pale line in front of the suture. There is no spiral 

 sculpture" (Dalfy. 



The columella suddenly widens as it enters the throat, with a 

 suggestion of the sort of fold seen in B. canaliferus. 



B. AMASTROIDES Ancey. PL 23, fig. 32. 



Shell small, oblong, subperforate, rather thin ; light olive colored, 

 with a paler peripheral girdle bordered above and below by rather 

 wide but very ill-defined brown bands. Surface glossy with growth 



