lO. 



Fig. 3S. 



jq recta.— ^\\c\\ somewhat eloiigately fusiform, straight, rather 

 gelid, fulvous-olive, Avhorls concavely sloping 

 around the upper part, conspicuously tubercled 

 at the angle ; tubercles rather small ; columella 

 arcuately twisted; canal broadly appressed; 

 aperture oblong; interior banded and stained 

 with reddish - purple. — 

 It e eve. 

 Habitat. — Tennessee. 

 lo rhomhica. — Shell 

 striately fusiform, ful- 

 vous-olive, encircled 

 with four bauds of pur- 

 ple-brown ; whorls con- 

 cavely sloping, conspic- 

 uously angled and tubercled in the middle; 

 columella but little twisted; canal rather 

 short, attenuately appressed. 

 Habitat. — Southern United States. 



Observations.— The specimen whicli Mr. Anthony has here named 

 I. rhombica, is of more regular growth than I. spinosa, with less twist 

 in the columella, and the whorls are more concavely sloping.— 2?eci-e. 



4. I. brevis, Anthony. 



To brevis, AKTHOvr. Proc. Acad. Nat. Sci., Feb., 1860, p. 69. Binnet, Check List, 



No. 3!)!). Reeve, Monog. lo, 1. 1, f. 4. 

 To spirostoma, AyxHONV, Proc. Acad. Nat. Sci., "" 



Feb., ISfJO, p. 70. Binxey, Check List, No. 403, 



Eeeve, Monog, lo, 1. 1, f. 1. 



Description. — Shell conic, ovate, horn- 

 colored, spinous; spines short, thick, five 

 on each whorl ; whorls about seven ; aper- 

 ture elliptical or pyriform, one-half the 

 length of the shell ; columella rounded and 

 sinuous near the base, forming with the 

 outer lip a broad, well defined canal at the 

 base. 



Length of shell, 2 in. ; breadth of shell, 

 li in. Length of aperture, 1 in.; breadth 

 of aperture, 5 inch. 



