MELATOMA. 



Plate II. 



Species 8. (Mus. Anthony.) 



Melatoma sph.ericum. Mel. testa subglolosd, fiaves- 

 cente-olivaced, villis virescente-nigris interruptis ein- 

 gulatd, spird pared, subimmersd, anfractibus convexis, 

 hrrihiis, subinflatis, fissura suturali stibcanaliculatd ; 

 columella callosd. 



The spheroid Melatoma. Shell subglobose, yellow- 

 ish-olive, encircled with interrupted fillets of greenish- 

 black, spire small, somewhat immersed, whorls con- 

 vex, smooth, rather inflated, sutural fissure slightly 

 channelled ; columella callous. 



Gyrotoma sphserica, Anthony, MS. 



Hub. Coosa River, Alabama, United States. 



A small globose shell, with its little spire distinctly im- 

 mersed, characterized by a copious banding throughout of 

 interrupted fillets of greenish-black, fuscous in the in- 

 terior. 



Species 9. (Mus. Anthony.) 



Melatoma demissum. Mel. testa cylindraceo-ovatd, obesd, 

 abrupte truncatd, fusco-olivaced, anfractibus puiicis, 

 concavo-planis, Itsvibus, ultimo versus aperturam de- 

 misso ; apertura parviusculd, fissura lata, profunda. 



The falling Melatoma. Shell cylindrically ovate, 

 stout, abruptly truncated, fuscous-olive, whorls few, 

 coneavely flattened, smooth, the last falling towards 

 the aperture ; aperture rather small, fissure broad, 

 deep. 



Gyrotoma demissa, Anthony, Pro. Acad. Nat. Sci. Phila- 

 delphia, I860, p. 65. 



Hab. Southern United States. 



The upper part of this specimen is truncated, but only 

 by erosion. 



Species 10. (Mus. Anthony.) 



Melatoma rectum. Mel. testa oblongo-cylindraced, fulvo- 

 olioaced, fasciis nigris angustis distantibus eingulatd, 

 anfractibus planiusculis, lavibusj apertura parviusculd, 

 ad basin paululum effusd,fissurd subprofundd, columella 

 contorto-incurvd. 



The straight Melatoma. Shell oblong-cylindrical, ful- 

 vous-olive, encircled with three distant narrow black 

 bands, whorls rather flat, smooth ; aperture rather 



small, a little effused at the base, fissure rather deep, 

 columella twistedly incurved. 



Gyrotoma recta, Anthony, Pro. Acad. Nat. Sci. Philadel- 

 phia, 1SG0, p. 64. 



Hah. Alabama, United States. 



Of a straight cylindrically oblong form, rather attenu- 

 ately effused at the base, with the columella more than 

 usually arcuately twisted. Before receiving the type of 

 this species, I had quoted it as a variety of M. incisum. 



Species 11. (Mus. Anthony.) 



Melatoma ornatum. Mel. testa ovatd, subpyramidali- 

 turritd,Jlavescente-oliraced, nigrescente-viridi concinne 

 spiraliter funiculatd, anfractibus quingue ad sex, su- 

 perni concavo-declivibus, ad suttiras carinatis ; aper- 

 tura pand, fissura lata, modice profunda, columella 

 ten ue reflexd, subrosaceo-albd. 



The ornate Melatoma. Shell ovate, somewhat pyra- 

 midally turreted, yellowish-olive, neatly spirally corded 

 with dark green, whorls five to six, coneavely sloping 

 round the upper part, keeled at the sutures ; aper- 

 ture small, fissure broad, moderately deep, columella 

 thinly reflected, pinkish-white. 



Anculosa ornala, Anthony, Pro. Acad. Nat. Sci. Philadel- 

 phia, 1S60, p. 67. 

 Gyrotoma ortiata, Anthony. 



Hab. North Carolina, United States. 



A charming little species, banded in a most character- 

 istic manner, with raised dark green cord-like ridges upon 

 a clear yellowish-olive ground. 



Species 12. (Mus. Anthony.) 



Melatoma Anthonyi. Mel. testa conico-ovatd, solidius- 

 culd, fulvo-fuscd, spird productd, anfractibus superne 

 declivibus, medio concavo-impressis, ultimo lira unicd 

 tenebrosd eingulatd; apertura subangustd, ad basin 

 attenuato-effusd, columella arcuato-contortd. 



Anthony's Melatoma. Shell conically ovate, rather 

 solid, fulvous-brown, spire produced, whoris sloping 

 round the upper part, coneavely impressed round the 

 middle, last whorl encircled by a single dark ridge ; 

 aperture rather narrow, attenuately effused at the 

 base, columella arcuately twisted. 



April, 1861. 



