THE NAUTILUS. 11 



Locality: Midway stage on McConnico plantation, Wilcox Co., 

 Alabama. 



Remarks : This specimen is quite imperfect, but the species is so 

 well marked that it deserves a name. It is probably the same form 

 mentioned by Prof. Harris in Bulletin of Am. Pal., No. 4, p. 232. 



SCALA DOLOSA n. Sp. PI. 1, fig. 13. 



Shell rather small, cancellated ; whorls eight, the first two smooth, 

 balance with spiral lines which are coarse near the middle of each 

 whorl, these lines give each whorl an angulated profile. The spirals 

 are nodular in part at the intersections with the longitudinals. The 

 figured specimen shows a varix ; aperture nearly circular, outer lip 

 expanded and rounded, interior smooth. Umbilicus open, and 

 carrying a groove. Base of shell carrying numerous spirals, but no 

 nodes, the lines of growth being very fine. Length 7 mm., breadth 

 4 mm. 



Locality : Near Grave Yard Hill, Wilcox Co., Ala. Midway Stage. 



FlSSURELLA UNILINEATUS n. Sp. PL 1, fig. 10. 



Shell small, rather thin, depressed conic, cancellated. The radial 

 lines are equal and regularly spaced, while the longitudinals are 

 bowed between the radials, giving to the surface a wavy appearance, 

 no nodules at the intersections, the lines crossing regularly. Hole 

 oval, with a complete oval callus inside. Longest diam. 13 mm., 

 breadth about 7 mm., height 3 mm. 



Locality : Wood's Bluff, Ala. 



NOTES. 



Ashmunella. On page 134 of the last number, the second line 

 from bottom should read Ashmunella rhyssa hyporhyssa Ckll., 

 in place of " Ashmunella rhyssa (Ckll.)." Owing to my absence in 

 Florida I had no opportunity to see the proofs of this article. 



H. A. P. 



THE ORIGIN OF THE LUNO IN AMPULLARIA. 



BY W. K. BROOKS. 1 



Through the courtesy of Dr. Alfred G. Mayer I was able to visit 

 and partially explore the Everglades of Florida in March, 1906. As 

 we pushed our way through the tall reeds and grasses that cover the 



1 From the Report of the Department of Marine Biology, Tortugns, Florida. 

 Extracted from the Fifth Year-Book of the Carnegie Institution of Washington, 

 p. 109, 1907, 



