THE XAUTILU.S. 107 



S. lineata Gould in Invert, of Mass., Binney'.s edit., fig. 580, but 

 not description. 



S. aayana Dall, Report on Blake Gasteropoda, p. 309 ; and Bull. 

 U. S. Nat. Mus. No. 37, p. 123, pi. 50, fig. 10. 



The mistake of considering S. humphreysii a synonym originated 

 with Sowerby. By blunder it is quoted " humphreysiana " in the 

 Conchologia Iconica, and Tryon evidently folloAved that work in- 

 stead of the original in the Manual of Conchology. To Dr. Dall 

 belongs the credit of discriminating the species from S. angulata, 

 and I regret the necessity which compels me to place the name he 

 proposed in the synonymy. tS. humphreysii is more plentiful than 

 the real S. angulata on the Southern New Jersey Coast. — H. A. P. 



Teeth of Snails. The Editor has recently received from Miss 

 Anna Goodsell, Poughkeepsie, N. Y., a number of beautifully 

 mounted radulte of AVestern ^Nlollusks. If conchologists who possess 

 microscopes of even very moderate powers will examine these 

 beautiful structures they cannot but become interested in them. 

 Odontophores of numerous Western species can be obtained of Miss 

 Goodsell.— P. 



PUBLICATIONS RECEIVED. 



On the lingual dentition and systematic of Pyrgula by 

 C. E. Beecher. (Ex. Jour. N. Y. Micros. Soc.) The dentition of 

 this interesting genus for many years a desideratum is figured and its 

 character discussed by Mr. Beecher. He concludes that Pyrgula is 

 most nearly allied to the Melanians. The true position of the genus 

 seems to us to be with Baicalia and its subgroups, Microvielania and 

 a few other small groups, which agree in having no basal denticles 

 to the central teeth. The entire anatomy, the shells, and the radula 

 (apart from this one character of lacking basal denticles) is that of 

 Amnicola and other fresh-water rissoids, not at all like Melania. Dr. 

 Fischer has already included Baicalia in the Hydrobiidte as a sub- 

 family, Baicaliince. I would enlarge his subfamily to include not only 

 Baicalia and its sections, but also Pyrgula and Mio^omelania. The 



