168 EUROPEAN SPECIES OF VERTIGO. 



other punctiform one), 2 columellar teeth, the lower very 

 small, often wanting; 2 short, high, equal, immersed teeth 

 in the palate, bounded by a reddish brown streak in front. 

 Peristome weak, expanded, the margins delicately united; 

 outer margin not impressed, scarce}^ produced angularly for- 

 ward. Length 2 to 21/4, diam. 1% to 1% mm. (WesterL). 



Sweden and Norway, type loc. on the southern shore of 

 Tresjon lake, near Ronneby. Western Ireland: Ballyna- 

 hinch, Co. Galway ; Connemara. 



Vertigo moidinsiana JEFFREYS, Brit. Conch, i, 1862, p. 

 255 (not of Dupuy), with var. bidentata, p. 256. Vertigo 

 modesta WESTERLUND, (Efvers af K. Vet. Akad. Forh, 1865, 

 p. 556; Malak. Bl. xiii, 1866, p. 45 (not of Say, 1824). Pupa 

 modesta A. West., PFR., Monogr. vi, 332. Vertigo lilljeborgi 

 WESTERLUND, Coll. Typ. Moll. Suecia, 1868, No. 60 ; Synopsis, 

 1897, p. 119, with var. merita, p. 119, and var. globula, p. 120. 

 R. A. PHILLIPS, The Irish Naturalist, May, xvii, 1908, p. 89, 

 pi. 3, f. 13, 14; p. 92, figs. G, H. (history of the species in 

 Ireland). Pupa Ittljeborgi WESTERLUND, Expose crit., Nova 

 Acta Eeg. Soc. Sci. Upsal. (3), viii, 1871, p. 90 (dist. in 

 Sweden) ; Fauna iii, 1887, p. 136. 



V. lilljeborgi, compared with V. moulinsiana, "is much 

 smaller, more glossy, its whorls are more tumid, and its thinner 

 lip lacks the broad, almost colorless margin of the latter. 

 The habits of the two animals also appear to be quite differ- 

 ent, for, as has been shown, V. moulinsiana, although inhabit- 

 ing marshes, avoids during both summer and winter anything 

 in the nature of damp or decaying matter ; while the favorite, 

 if not only, habitat, in this country at least, of V. lillje~borgi, 

 is among the decaying roots and stems of aquatic plants cast 

 up on lake shores' 7 (R. A. Phillips). 



Westerlund's localities in Sweden are also lake shores. 

 Among other notes he states that the present species has so 

 much resemblance to P. antivertigo Drap. in form, color, size, 

 that he at first glance took it to be the young of this species, 

 which also occurs on nearly all of our lake shores. It differs 

 from antivertigo by the yellowish, not reddish brown color, 

 the more convex whorls, brighter gloss, the shape of the neck 



