60 THE NAUTILUS. 



Total 8") species. The Pi'sidia will be published by Dr. Sterki, and 

 the results will thus be made known to those interested in these little 

 animals. OLOF O. NYLANDER. 



GENERAL NOTES. 



We regret to record the deatli on August Kith of Dr. W. D. Hart- 

 man, of West Chester, Pa. Further notice will appear next month. 



I'OMATIA ASPERSA IN CALIFORNIA. I louiul a fine living speci- 

 men of Ponialia aspersa, Miill., this summer at Pacific Grove, Cali- 

 fornia. A small colony of I his European snail was established many 

 years ago at, San Jose, more than fifty miles from the spot where this 

 specimen was lound. The species is apparently becoming naturalized. 

 Josiah Keep. 



POLYGYHA BIXNEYANA. Owing to hasty proof reading, several 

 errors appear in the article on " New Southwestern Forms of Poly- 

 gyra " in the July issue. On page 38, sixth line from top, the word 

 umbilicus should be inserted between dtvcstu and narrow. On p. 39 V 

 second line, for " county " read " country." H. A. P. 



THE BRITISH PLIOCENE NON-MARINE MOLLUSCA are revised 

 by Messrs. A. S. Kcnnard and B. B. Woodward, in Proc. Malac. 

 Soc., Lond. JII., pt. 4, March, 1899. "It is in the Red and Nor- 

 wich Crags that the genesis of our present mollusean fauna is to be 

 sought. It is a noteworthy fact that many of our existing species 

 are met with for the first time in these beds, and are not known to 

 have existed on the continent until a much later date. This may 

 result from the imperfection of the geological record, or it may indi- 

 cate that these forms have been derived from a region to the north- 

 ward." Of 38 species discussed, G are extinct. G species, Corbicitla 

 ftumincdis, Helix ladea, Hygromia rubiginosa, H. incarnata, Heli- 

 codonta Jens, and Eufota frutiontn are now extinct in England, though 

 living on the continent; C. fluminalis and Eulota fiuticum having 

 existed to the Post-Pliocene. It is interesting to find that Kulot.a 

 extended in the Pliocene so far f o the westward. Helix Incteu and 

 ffeli.ffodonta /e/?, each represented by very scanty but apparently 

 authentic material, are now restricted to the cireum- Mediterranean 

 fauna. One new species, P<i/udcstrina Rcevet\ is deseribed from the 

 Norwich Crag. It is allied to the Upper Oligocene and Lower Mio- 

 cene P. obtusa (Sandb.) of Germany. 



