32 THE NAUTILUS. 



VARIATIONS OF HELIX H3RTEKSIS AT ROCKPORT, MASS. 



BY T. D. A. COCKEIiEI.U. 



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

 kortensis collected ;it Rockport, Mass. The specimens (40) include 

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

 collected. Mi - . Clapp says : " The handless or very faintly banded 

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

 even less plenty than the transparent banded variety. On rainy 

 davs the shells were out by the hundreds." 



The variations in the series are as follows: 



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



(2.) v. arem'cola, MacGillivray ; bands colorless, translucent. 

 1234f,. 



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

 00000 and 003 45 . 



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

 123(45), (123)(45), 1 2 345, 10345. 00334, (two), 00/tO, 003,0, 12045. 

 Some are unusually thin ; most of die 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. hortensis is varying in the same direction as the Lexington, 

 Va.. H. nemoralis. The two split-band formula' are new, to the best 

 of my knowledge. 



DR. BABOR'S REDISCOVERY OF ASPIDOPORUS. 



In 1833. Fitzinger described as Afj»'doporns 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 Urocychts. It remained for a good many years unnoticed; 

 but in 1<S<S4, Heynemann saw the original example, and declared it 



1 Ueber Aspidoporus Umax Fit/., in Annalen des K. K. Natuihistorischen 

 Hofmuseums, xiii. Heft 1. 



