134 THE NAUTILUS. 



at the external border. A smooth, wedge-shaped area radiates 

 towards the columellar margin, and the areas above and below this 

 are lamellose, the lamellae at right angles to the sides of the median 

 wedge. This is quite unlike all known genera of the region. 



CERATODISCUS RAMSDENI n. sp. 



The shell is minute, planorboid, the spire slightly sunken, um- 

 bilicus open, conic, showing all the whorls. Whorls 2, tubular, 

 the last whorl descending slightly and becoming free from the pre- 

 ceding a short distance behind the aperture. Initial half whorl 

 smooth ; following whorl having several raised spiral threads ; sub- 

 sequent whorls with sculpture of fine, somewhat irregular growth- 

 lines only. The aperture is slightly oblique, not quite circular, the 

 inner border being a little straightened. The peristome expands 

 just perceptibly, and is not or scarcely thickened. 



Alt. 1.3, diam. 3 mm. 



Guant&namo, Cuba, on the San Carlos Estate, numerous speci 

 mens. 



This species is far smaller than C. minimus, and differs by the re- 

 striction of spiral sculpture to the first neanic whorl, and by the free 

 end of the last whorl. In C. minimus the spiral sculpture continues 

 upon the last whorl. Although the specimens of C. ramsdeni were 

 dirty when collected, I doubt whether they are so in life. (?. mini- 

 mus carries a peculiar, bicarinate coat of dirt, firmly cemented on 

 with mucus, and which almost or quite conceals the shell. 



C. solutus H. &. S., of Haiti, is a larger shell, more depressed, 

 with the last whorl free for a greater distance. 



The new species will be illustrated next month, together with 

 various other new Cuban shells. 



NOTES. 



BY JAS. H. FERRISS. 



A set of Oreohelix iowensis Pils. from Prof. B. Shimek of Iowa 

 City, with gentle washing and a slight touch of oil exhibited their 

 pink bands, though resurrected from their tombs in the Loess where 

 they slept some thousands of years. The syringing also brought 

 out five juveniles from one specimen, and some of those were also 

 banded. 



