SUMATOGYRUS. 



•79 



I obtained this shell when traversing the northwestern part of the Union. 

 It is much larger than the poTutu, nob., which it resembles considerably, 

 but its whirls are much mora rapidly enlarged, and the uml^ilicus is much 

 narrower. (Sdj/.) 



Fig. 152 is from Haldeman's Monograph. 



fat. No. 



9216 

 9223 

 fi224 



No. of Sp. 



Locality. 



Ohio, 

 biiio. 



From whom received. 



W. G. Binney. 

 Geu. Totten. 



Remarks. 



[Ward. 



Pol. subfflobosa, teste 



Fig. 156. 



Leptnxis Inte- 

 gra, enlarged. 



Soniatogyrus integer, Say.— Subglobose, horn-color; volutions 

 rather more than three, rounded, obsoletely wrinkled ; spire very short, 

 less than half the length of the aperture ; suture rather 

 deeply impressed ; body whirl large, aperture dilated 

 ovate, acute above ; columella flattened, polished ; labrum 

 regularly rounded ; base regularly rounded, without any 

 undulations or sinus ; umbilicus none ; operculum obvi- 

 ously spiral. Length nearly one-fifth of an inch. Animal, 

 foot longer than wide, rounded behind, with the anterior 

 angles a little excurved ; eyes black, conspicuous ; ten- 

 tacula rather long and slender. 



Inhabits the Ohio River and many of its tributaries. 



This is a very common little shell, abounding more in 

 many situations than any other species, particularly in the vicinity of the 

 Falls of the Ohio. It may readily be taken for a young shell. (^Say.) 



Mehnua Integra, Say, New Harm. Diss. II, 276 (1840) ; Descr. 19 ; Bin 

 ney's ed. p. 144.— DeKay, N. Y. Moll. 96 (1843). 



Anculotus pumilus, Conrad, teste Haldeman and Reeve. 



Anculotus integer, Rekve, Con. Icon. 35 (1861). 



Leptoxis Integra, Haldeman, Mon. Lept. 6, pi. v, f. 154 (1847?). 



Amnicola Integra, Haldeman, Jour. Phila. A. N. S. VIII, 200 (1842). 



Paludina fontinalis, Philippi ? see last species. 



Fig. 156 is copied from Haldeman's Monograph. 

 Fig. 157 is a fac-simile of the drawing of its lingual dentition, 

 given by Troschel (Gebiss der Schneeken). 



Fig. 157. 



Lintjual deutition of Somatogyrus integer. 



