FAMILY COLIMACBA. 119 



4. Vertigo alpestris. Alpine Vertigo.'^ 



Shell ; minute, oblong-cylindrical, narrowly umbilicated, fulvous 



olive, thin and transparent, very glossy, 



whorls four to five, increasing slowly, con- 

 vex, smooth or finely striated ; aperture 



semiovate, with four teeth, one of which is 



on the body whorl. 

 Vertigo alpestris, Alder (1830), Trans. Nat. Sist. Soc. 



Northumb. vol. ii. p. 340. 

 Vertigo (Isihmia) alpestris, Gray (1840), Turt. Man. 



p. 202. 

 Pupa Shuttleivorthiana, Cliarpentier (1847), Zeitsch. fiir Malak. p. 148. 

 Pupa pygmaa, var., Forbes and Hanley (1853), Sist. Brit. Moll. vol. iv. 



p. 106. pi. cxxx. f. 6. 

 Sab. North of England. Northern and Central Europe. (Under stones 



among dead leaves on the hills.) 



There is a difference of opinion among conchologists as to 

 whether this species is anything more than a northern and alpine 

 variety of V. pygmcea. The animal is, however, of a bight straw- 

 colour, with the tentacles and foot longer than in that species, 

 and the shell, it will be seen, on a comparison of our figures, is 

 more narrowly cylindrical and more distinctly striated ; it is more- 

 over paler in colour, and of a more glassy transparency. 



5. Vertigo striata. Striated Vertigo. 



Shell ; minute, shortly cyhndrical, compressly umbilicated, yellowish 



horny, thin, semitransparent, whorls four to 



four and a half, tumidly rounded, strongly ^ 



obbquely striated, constricted at the sutures ; 



aperture semiovate, a Httle contracted at the 



side, with four to six small teeth, lip thin, 



sHghtly reflected. 

 Alcea substriata, Jeffreys (1830), Trans. Linn. Soc. 



vol. xvi. p. 515. 

 Pupa substriata, Alder (1830), Trans. Nat. Sist. 



Soc. Northumb. vol. ii. p. 339. 

 Vertigo substriata, Alder (1837), Mag. Zool. and Bot. vol. ii. p. 112. 

 Vertigo curta, Held (1837), Isis, p. 304. 

 Vertigo (Istkmia) substriata, Gray, (1840), Turt. Man. p. 202, pi. vh. f. 84. 



