EUPARYPIIA. 375 



its upper extremity. It is composed of several, apparently 6, separated fas- 

 oieuli of blind tubes. Tlic vas deferens enters the i)enis sac about its middle, 

 not at its end. The jKjnis sac is small, cylindrical. It terminates in a small 

 bulb. There is no trace of lobuli in the ovary, but its under, concave surface 

 is rt'ticulatvd. The genit.al bladder is oval, its duct is lonjj;, free only for a 

 short distance, tlien attached to the oviduct the whole length of the latter; at 

 its base it becomes again free, and enters the vagina below the terminus of the 

 oviduct. At about the same point, the vagina receives the mouth of a long, 

 broad, rounded orn;an. This organ is hollow. Its use is unknown to me ; it may 

 be a dart sac or a prostate gland. The vagina is very long, the penis enters 

 it at its lower extremity near the exterior opening of the genitalia. 



EUPARYPHA, Hartm. 



Animal heliciform ; mantle subcentral ; other characters as in Patula. 



Shell usually perforate, depressed-globpse, corneo-calcareous, banded ; whorls 

 5, the upper ones flattened, carinate, the last inflated ; aperture dilate-lunar, 

 often labiate within, its columellar margin reflexed. 



Inhabits the countries around the Mediterranean, Canaries, Madeira, etc. 

 In North America it is represented in Lower California, one species being 

 actually found in the California Region. 



Jaw high, arcuate, ends but little attenuated, blunt ; cutting margin without 

 median projection ; anterior surface with a few (al)out 5 in Tryoni) stout, sepa- 

 rated, unequal ribs, deeply denticulating either margin. 



As usual in most of the species of Helix^ etc., examined by me, the number, 

 size, and disposition of the ribs vary in different Individ- 

 uals of the only species of Euparypha I have examined, 

 E. Tryoni In L. and Fr.-W. Shells N. A., I. 179, six 

 jaws are figured, all differing as to the ribs. (See also 

 next page.) 



I have had no opportunity of examininji areolata, the ^ , xr ^ 



^^ / ^ » ' Jaw of H. Tryoni. 



only other species found within our limits. Among the 



species of the genus foreign to the United States, pisana, Miill., alone has 



been examined, the jaw being figured by Moquin-Tandon with 2-3 ribs only, 



and the number of the teeth being given by Thomson. 



Lingual membrane as in Arionta. 



Euparypha Tryoni, Newcomb. 



Shell imperforate, globose-conic, solid, with distant, deep, strong revolving 

 lines cutting through the striae of increase, of a bluish ash-color above, mottled 

 with irregular oblique patches of brown, and with a median revolving line of 

 dark brown, below dirty white; spire conic ; apex obtuse, smooth, shining, light 



