122 

 Figure 4, 5. Cvclostoma Cumingii, ? Soweiby. 



Zool. Proceed. Ifc33. 2d Part, p. 33. 



Habitat, Island of Tumaco, South America. 



Remarks. I have two fine specimens of this large and rare Cyclostoma. The 

 apex of the spine is visible in the Umbilicus. The largest one measures 2f of 

 an inch in breadth, and 1^ inch in length. 



Figure 6. Bulimus dubiosus, Nobis. 



Habitat, Brazil. 7 



Remarks. — Shell turrited — mouth ear-shaped — columella with a white ridge, 

 caused by the reflection of the internal lip, which covers, or rather forms an um- 

 bilicus — lip acute, aperture narrow, contracted, and produced backwards at its 

 base, forming something like a canal. It has nine whorls slightly convex, and 

 compressed at the sutures. It is striped longitudinally and diagonally, with irre- 

 gular ferrugineous lines — size If inch in length, and f broad. For this curious 

 and interesting species I am indebted to G. W. Pratt, Esq. of Boston, Mass. 



Figure 7, 8. Cyclostoma multicarinata, Nobis. 



Habitat, unknown. 



Remarks. — The last whorl of this shell has ten elevated horizontal ribs, or 

 ridges, equi-distant from each other, and crossed longitudinally by numerous 

 fine strias — margin is reflected, and partly covers the umbilicus — lip white, 

 shell reddish ; with the exception of the fimbriated edge to the margin, it re- 

 sembles Cyclostoma pulchrum, Sowerby's Genera of Shells, figure 2. 



Figure 9, 10. — Cyclostoma maculosa, Nobis. 



Habitat, unknown. 



Remarks. — This Cyclostoma is remarkable for the angularity of the base of 

 the body whorl, and somewhat resembles the base of a Trochus. The umbili- 

 cus is almost closed. The shell has a polished appearance, and is beautifully 

 mottled with reddish brown blotches. 



Figure 11. Melania Iseta, Nobis. 



Habitat, Rivers in Alabama. 



