THE NAUTILUS. 107 
S. lineata Gould in Invert. of Mass., Binney’s edit., fig. 580, but 
not description. 
S. sayana Dall, Report on Blake Gasteropoda, p. 309; and Bull. 
U.S. Nat. Mus. No. 37, p. 123, pl. 50, fig. 10. 
The mistake of considering S. humphreysti a synonym originated 
with Sowerby. By blunder it is quoted “ hwmphreysiana” in the 
Conchologia Iconica, and Tryon evidently followed 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. S. humphreysti is more plentiful than 
the real S. angulata on the Southern New Jersey Coast.—H. A. P. 
TreeTuH oF Snaits. The Editor has recently received from Miss 
Anna Goodsell, Poughkeepsie, N. Y., a number of beautifully 
mounted radulee of Western Mollusks. 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, Micromelania 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 Hydrobiide as a sub- 
family, Baicaliine. I would enlarge his subfamily to include not only 
Baicalia and its sections, but also Pyrgula and Micromelania. The 
