32 THE NAUTILUS. 



VARIATIONS OF HELIX HORTENSIS AT ROCKPORT, MASS. 



BY T. D. A. COCKEREL!.. 



I have just received from Mr. G. H. Clapp a little series of H. 

 hortensis collected at Kockport, Mass. The specimens (40) include 

 all the variations Mr. Clapp could find in a series of about 300 shells 

 collected. Mr. Clapp says : " The bandless or very faintly banded 

 forms were by far the most common. Typical shells were scarce, 

 even less plenty than the transparent banded variety. On rainy 

 days the shells were out by the hundreds." 

 The variations in the series are as follows : 

 (1.) v. stibylobosn, Binney ; shell greenish. 00000 and 00 34 0. 

 (2.) v. arenicola, MacGillivray ; bands colorless, translucent. 

 12345. 



(3.) v. sitbalbidu, Locard ; yellowish-white or very pale yellowish. 

 00000 and 003. 



(4.) v. htten, Moq.; yellow. 00000, ,03,5, 1234 55 , 0034 5 , 12345, 

 123(45), (123)(45), 1,345, 10345,00334, (two), 00,00, 003 4 0, 12045. 

 Some are unusually thin ; most of the bandless yellow specimens are 

 very brilliantly colored ; one 12345 specimen is very small, only 16 

 millim. diam. 



The really interesting thing about the series is that no less than 

 three specimens show split bands, indicating apparently that this col- 

 ony of H. horlensis is varying in the same direction as the Lexington, 

 Va., H. nf moral! x. The two split-land formulas are new, to the best 

 of my knowledge. 



DR. BABOR'S REDISCOVERY OF ASPIDOPORUS. 1 



In 1833, Fitzinger described as Asptdoporus Umax a slug from the 

 mountains of Austria, which had the character, anomalous for a 

 European form, of an opening in the mantle, as in the tropical Afri- 

 can Urojcyclvs. It remained for a good many years unnoticed ; 

 but in 1884, Heynemann saw ihe original example, and declared it 



^eber Aspidoporus limax Fit/,., in Annalen ties K. K. Naturhistorischen 

 Hofmuseums, xiii, Heft I. 



