48 THE NAUTILUS. 



1, 7, and 8) A. minor is a little more elevated than the former, has 

 5 flat whorls and the space between the carinae is on the same plane 

 as the rest of the base of the shell, the revolving impressed lines are 

 more prominent than on either of the above species, the mature 

 shell has more in common with A. mefanoides, but that species is 

 more elevated with no carina or impressed lines. 



A NEW FLORIDIAN VIVIPAEUS. 



BY H. A. PILSBRT AND C. W. JOHNSON. 



VIVIPARUS WALKERI n. sp. Plate III, figs. 6, 7. 



The shell is perforate, moderately solid, globose- conic, dull yellow- 

 ish-brown, lighter beneath, with three or four very indistinct pur- 

 plish-brown bands, or dull purplish-brown without bands ; faintly 

 striated. Spire short, much eroded and whitish in adults, which 

 retain about 3 whorls. Whorls very convex, somewhat flattened 

 horizontally below the very deep suture. The aperture is large, 

 slightly oblique, ovate, livid and showing the bands within by trans- 

 mitted light, when any are present. 



Length 26, diam. 22, length of aperture 16^ mm. 



Length 26, diam. 21, length of aperture 15 mm. 



Types no. 70,053 A. N. S. P., collected by Pilsbry and John- 

 son in Juniper Creek, Lake County, Florida, 1894. 



This species differs strongly from other Viviparas of Florida by 

 its broad, short form. It was taken in considerable numbers in the 

 type locality, but was not found elsewhere. V. waltoni Tryon is the 

 prevalent form in Lake George, and V. georgianus in the St. John's 

 River. It is named in honor of Mr. Bryant Walker, whose work on 

 fresh-water shells is well-known to readers of THE NAUTILUS. 



NOTES. 



WE have to record the recent death in Honolulu of the veteran 

 Hawaiian conchologist, D. D. BALDWIN. A sketch of his life and 

 work will be given later. 



MR. CHARLES HEDLEY of the Australian Museum has been 

 studying the museums of this country during June and July. 



MESSRS. J. B. HENDERSON, JR., and GEORGE H. CLAPP have 

 returned from a cruise in the western Bahamas on the yacht Eolis. 

 DR. PAUL BARTSCH has also visited the Bahamas on the Carnegie 

 Institution yacht Anton Dohrn. 



