ABIDA. 323 



recognizable, and somewhat widely spread. I have seen it 

 from Lausanne (fig. 15), Lyons and elsewhere, variabilis 

 occurring in the same districts, though not, probably, in the 

 same colonies. 



Minor variations, doubtless partly local or racial forms, 

 have been named; part were ranked by their describers as 

 "varieties," part as species, as follows: 



Var. major Moquin-Tandon, 1855. Shell a fourth larger 

 (than the normal size of 8-10 mm.). Grasse. 



Var. minor Moq. Shell a fourth smaller. Ries, Montpellier. 



Var. labiosa Moq. Shell of the same size (8-10 mm.), the 

 peristome much reflected and very thick. Cette, Grasse. 



Var. pachygaster Moq. Shell 8-10 mm., very ventricose, 

 peristome quite thin. Montpellier, Avignon. 



Var. ovularis Moq. Shell a third smaller, very ventricose, 

 ovoid, peristome quite thick. Basses-Alpes. 



Var. incertus Hartm. PI. 46, fig. 9. Shell pale horn-color, 

 3 lines long, 1 wide ; 8 apertural folds, 2 on the colurnellar, 4 

 in the outer margin, 2 on the parietal wall, of which one ap- 

 pears as a tubercle at the lip-insertion. Under stones and on 

 rocks at Zurich, Switzerland (Chondrus variabilis var. Ch. 

 incertus Hartmann, System der Erd- und Suesswasser Gas- 

 teropoden Europa's, 1821, p. 50, no. 20, no description; Neue 

 Alpina, i, 1821, p. 218; and in Sturm's Deutschlands Fauna, 

 vi Abth., 6 Heft, 1823, unnumbered page and plate, f. a, B. 



Hartmann 's figure, copied in fig. 9, shows three short folds 

 above the long lower palatal, but the shape is that of variabilis. 



Pupa ovulina Loc. Small, ovoid-swollen, tapering above 

 and below; 8 rather close whorls, slightly convex, the suture 

 marked ; aperture small, straight, rather rounded ; 2 superior 

 folds, the largest at the suture, very flexuous, a little calloused ; 



2 rather strong columellars, far immersed, quite contiguous; 



3 palatals, the upper two rudimentary and deeply immersed, 

 only the third attaining the peristome ; peristome a little re- 

 flected, quite thin. Shell thick, red, ornamented with nearly 

 effaced strife. Height 61/2-8, diam. 3 mm. Not common. 

 Gard, Vaucluse, Bouches-du-Rhone, etc. (Pupa ovulina Lo- 

 card, Ann. Soc. d'Agricult. Lyon (7), iii, 1896, p. 189). 



Pupa ischurostoma Bgt., Loc. Subconic, quite wide at base, 



