VERTIGO, 



25J 



Pupa ovuhun, Pfeiffee, dim, Symbolse, I, 46. 



Tsikmia ovata, Mokse, Jouru. Portl. Sou. I, 38, f. 93 ; pi. x, f. 94 (18(J4). 



From Maine to Texas. Also quoted from Mexico and Cuba. 

 , Jaw arcuate, of uniform breadth, ends square 

 and horizontal ; anterior surface with longi- 

 tudinal wrinkles ; concave margin simple, with 

 a median projection. 



Lingual membrane with 90 rows of twenty- 

 nine teeth (14 — 1 — 14); centrals tricuspid, 

 laterals and uncini serrated. 



Fig. 445. 



Jaw of Vertigo 

 ovata. [Mokse.] 



Lingual dentition of Vertigo ovata. [Mokse ] 



ture semicircular, with five teeth, one 

 prominent on the parietal margin, two 

 smaller on the columellar margin, and two 

 prominent within, contracting the aperture 

 at the base ; peristome widely reflected, 

 the right margin flexuose, within thick- 

 ened and colored. Length .07, breadth 

 .045 inch. (Moise.) 



Isthmia ventricosa, Mokse, Ann. N. Y. Lye. 



VIII, 1, f. 1-3 (Nov. 1865). 

 Vertigo ventricosa, Mokse, Amer. Nat. I, 



669, f. 61, 62 (1868). 



Fi-r. 446. 



Vertigo ventricosa. 



Maine, Xew Hampshire, and New York. 

 I have not seen this species. Mr. Morse says it has been 

 confounded with V. ovata, but is one-fourth smaller, has one 



