246 THE CHICAGO ACADEMY OF SCIENCES. 



the genital bladder is large, ovate, on a long, narrow duct." 

 (W. G. Binney.)* 



Distribution: North America, Europe, Madeira, Australia. 



98. Cochlicopa lubrica Miiller, pi. xxx, fig. 17. 



Helix lubrica MULLER, Verm. Hist., Vol. I, p. 104, 1774. 



Bulimus lubricoides STIMPSON, Shells of N. E., p. 54. 



Cionella (Zua) morseana DOHERTY, Quart. Journ. Conch., Vol. I, p. 342, 



pi. iv, fig. 2, 1878. (Variety.) 



Helix (Ferussacia} subcylindrica Aucx., non LINNE. 

 Ferussacia lubrica of various authors. 



Shell: Small, elongate oval, pellucid, smooth, shining, 

 transparent; surface covered with very fine growth lines, apex 

 smooth; color smoky-horn; whorls six, convex, gradually and 

 somewhat regularly increasing in size, each whorl being about 

 twice the size of the one preceding, and the last being almost 

 one-third the length of the entire shell; sutures impressed; 



Fig. 74. 

 Animal of COCHLICOPA LUBRICA Muller. (Binney, Fig. 199.) 



spire conical, apex obtuse; aperture long-oval, the plane of 

 the aperture parallel, or nearly so, with the axis of the shell; 

 peristome simple, thickened, tinged with reddish; its termina- 

 tions separated and connected by a thin callus; columella trun- 

 cated at base, and somewhat sinuous at its junction with the 

 peristome; umbilicus-closed; base of shell rounded. 



Length, 5.75; diam., 2.00; aperture length, 2.00; diam., 1.00 mill. (10232.) 

 6.25; " 2.25; " " 2.25; " 1.25 " (10131.) 



6.00; " 2.00; " " 2.25; " 1.25 " (10233.) 



Animal: With a short, wide foot, truncate before and 

 pointed behind; color bluish-black above, lighter below, espe- 

 cially on the foot; eye-peduncles long, thick, cylindrical, the 

 eyes placed on prominences at their tips; tentacles very short, 

 blunt; other characters as in the genus. Length of foot 6.00, 

 width 2.00 mill. (Fig. 74). 



Jaw: As described in the genus (Fig. 75, J). 



Radula formula: T e T _|_.| + |_|_.j . + 1 + 9 +v e_ ( 23 _ I _ 23 ) : 

 central tooth with a base of attachment much longer than wide, 



*Man. Amer. Land Shells, p. 195. 



