120 TIIK NAUTILUS. 



Var. fraternum, n. Less elevated ; superior and inferior margins 

 slightly curved, and the former long ; beaks not much prominent ; 

 surface with irregular, shallow striae, shining; color horn to yellowish- 

 horn, usually in irregular, alternating zones, also more or less 

 translucent. In its surface appearance it resembles the " eastern 

 form " of Pis. abditnm Hald. 



New Philadelphia, and Akron, Ohio (Sterki); similar but smaller 

 forms from Kent Co., Mich. (Dr. Kirkland). 



Var. alabamense, n. Higher; beaks quite prominent; superior 

 margin more curved and sloping down into the anterior and posterior 

 without or with slightly prominent, rounded angles ; mussel rather 

 large and well, regularly inflated ; surface with rather sharp, sub- 

 regular striae, slightly shining to dull, and microscopically rugulose ; 

 color yellowish to grayish-horn ; size, long. 6, alt. 5, diam. 4.6 mm., 

 a few even larger, but most specimens are smaller. 



Hab.: Alabama, along the Coosa river, common (H. H. Smith), 

 Tennessee river (Sargent, Hinkley), Columbus, Mississippi (Hink- 



ley). 



This Pisidium is rather variable. While most specimens are as 

 described, and appear to represent a distinct species, others approach 

 the " typical " New York and Ohio form in shape. 



NOTES AND NEWS. 



A NEW LOCALITY FOR PLANORBIS NAUTILEUS LINNE. While 

 identifying a lot of shells recently for Dr. William A. Nason of 

 Algonquin, Illinois, a single specimen of Planorbis nautileus was dis- 

 covered in a lot of other small Planorbes, parvus, albus, deflectus. 

 The single specimen is rather large, 2^ mill, in diameter, and the 

 ribs on the base of the shell, which give it its strong nautiloid ap- 

 pearance, are very large and distinct. The flat upper surface is also 

 conspicuous. This habitat, Algonquin, Illinois, adds a new southern 

 and western locality to the range of this interesting species. FRANK 

 COLLINS BAKER. 



ERRATA. NAUTILUS. Jan. 1906, p. 101, line 5, for "ones" 

 read " one;" p. 101, line 7, for " Ramalley read " Ramaley." T. D. 



A. COCKERELL. 



