SCIENCE-GOSSIP. 



45 



land of the north-east Kent coast is steadily 

 sinking, as well as disappearing, through the en- 

 croachments of the sea. In years to come. Heme 

 Bay and Reculvers, if left to themselves, would be 

 destroyed, and to compensate for this, the untiring 

 sea would give us dry land between Sheppey 



and the " Marshes," that is, unless the land 

 sunk more quickly than was compensated for 

 by the ballast removed from the first-mentioned 

 places. 



iS, Chihl'dl Street, Nottingham ; 

 June, 1897. 



FOREIGN VARIETIES OF BRITISH LAND AND 



FRESHWATER MOLLUSCA. 



By T. D. A. Cockerell. 



(Continued from Vol. iii„ page 262.) 



'THE parts of this list will not be given in 

 systematic order, but in such order as con- 

 venience dictates It is to be hoped that some of 

 the readers will be able to offer criticisms and 

 additions to the several parts, which no doubt the 

 Editor will be glad to publish. 

 Slxcinea. 

 There is much useful work to be done among 

 the British members of the genus Succinea, 

 especially in observing the variations in the soft 

 parts and the anatomical differences. 

 Scccinea putris, L. Westerlund, in 1S85, thus 

 classified the forms we commonly refer to putris. 

 (1) S. putris, L. Form, minuscula, Baud. Scarcely 

 8 mm. long. France. 

 a. Longish forms with normal, or drawn-out 

 spire. 

 Uvula, Baud. France, England, Germany, 

 etc. 

 v. bavarica, CI. Bavaria. 



v. limnoidia. Pic. France. Russia, England, 

 etc. S. acuta. Pfr.. is probably a synonym. 

 v. chssiniana, Haz. Red-brown or reddish- 

 yellow. Whorls, 4. Hungary. 

 f. gotlandica, West. 27 mm. long. Gotland I. 

 v. grandis, Haz. 25-27 by 13 mm. ; whorls, 4. 



Hungary, France, Germany. 

 v. angusta, Haz. Hungary, Italy. 



f. scquanica, Bgt. 14 by 7 mm. France. It 

 be remarked here that sequanica dates 

 from 1877, and so should properly stand 

 for the variety (to include angusta), since 

 Hazay's variety was published in 1880. 

 v.ftzgeraldiana, Haz. Reddish-yellow. 16 by 

 8 mm. Whorls, 4. England, Switzerland. 

 c '.erlundiana, Haz. 21 by 10 mm. Hun- 

 gary. 



.rma. West, Above, whitish ; beneath, 

 amber colour. iO-i7by9-io mm. ; whorls, 

 4. Briakowskij Island, Siberia, in 70'-' 39' 

 N lat. 

 v. hazayana, '.'. Idish-yellow 19^-22 



. 10 mm. ; whorls, 4-4$. Tunguska, 

 Siberia, in 61 N lat. 

 f. angutta, Hand. France, 

 f. txttn-.a. f'.aud. I ranee 



led spire. 

 v. charpentUri, D. add M Thin-shelled ; spire 

 very short; 15 by 10 mm. England, 



v tuhgUibota, Pascal. Thin-shelled . mouth 

 large: 17-18 by 9 mm. England, I- 

 Sweden 



f. drouetia, Moq. Clear yellow. France, 

 Sweden. 



v. globidoidea, CI. Small ; broad-oval. Ger- 

 many, England. 



v. fontanel, Haz. 20 by 10 mm. Hungary. 



v. ferrusina, Moq. Clear yellow. France, 

 England, etc. 

 f. vitracea, Paul. 12 by 7 mm. Sardinia, etc. 



v. milneedwardsi, Bgt. Yellowish-olive; 15 by 

 11 mm ; mouth 11 by 6 mm. France, 

 f. xanthelcea, Bgt. Small ; whorls, 2 or 3. 

 Probably a juvenile. 



v. trianfvacta, DaC. (177S). Broad-oval, greyish- 

 yellow ; 15-16 by 9-10 mm ; mouth 11 by 

 6 mm. ; mouth broad-oval ; whorls, 3J-4, 

 rounded. England, Denmark, Sweden, 

 Hungary. 



v. temporalis, West. Long-oval ; thin-shelled ; 

 16-17 by 8-9 mm. ; mouth 11-12 mm. long. 

 Ronneby, Sweden. 



v. charpyi, Baud. Spire short, conic ; whorls 

 convex ; mouth long-oval. France, Eng- 

 land, etc. 



v. Mans, Baud. Mouth very large, 1 1 by 5J-6 

 mm. France. 



v. parva, Haz. 18 mm. long. Hungary. 

 Rem.-Kob. Icon., f. 2051. 



(2) S. parvula, Pascal. 8-11 by 6-7 mm.; mouth 



6&-7J mm. long. France, Italy, Sweden, 

 Engfand, Germany. S. succica, Cless., is a 

 synonym. 

 v. aberrata, Paul. MS., West. Mouth long- 

 oval ; length of shell, 7-7J mm. ; of 

 mouth, 5-5J. Italy. 



(3) S. stagnalis, Gass. France. 



i.jejfreysi, Baud. Mouth large, 8-10 by 4-5 



mm. Cumberland, England. Westerlund 



considers S. putris v. vitrea, Jeff., to be the 



same. 



In the above list I include the British as well as 



foreign varieties ; the additional foreign varieties 



of S. putris, not given in Westerlund's revision are 



v. perfect* (Haz.), Cless., Hungary (this and the 



next are in Westerlund's supplement, 1890); 



v. radiata, C. G. West., Sweden ; v.camca, Moq. ; 



v. brariia, Moq.; v. webbia, Moq.; v. studcria, 



Moq. ; v. pulchella, Moq. ; v. opaca, Moq. ; V. curia, 



• olb . v. nigrolimbata, Colb. ; v. rubens, Baud. ; v. 



alba, Baud. ; v. scalaroidcs, Baud. ; also typus, 



Bandon 



Uuilla, ;■" Mexico, ' I 

 April nth, 1^7. 



