THE CYCLOPHOEID LAJSID M0LLUSK9 OF AMEiRIClA 41 



shaped, which shows all the whorls within. The inside of the oper- 

 culum is convex, slightly calcified, showing all the turns, and the 

 outside shows 10 turns of an oblique, outward-turned, calcified 

 lamella, which is marked by slender striations, the turns of the 

 lamella overlapping each other somewhat like shingles on a roof, 

 leaving, however, a narrow space between them. 



The specimen described and figured, U.S.N.M. No. 535776, was col- 

 lected at San Andres, near Keuter, Oriente Province by Dr. Ramsden, 

 who has furnished information showing that this falls well within 

 Gundlach's concept of Jurisdiccion, Cuba, his type locality. It has 4.1 

 turns and measures: Height, 4.4 uim; greater diameter, 11.0 mm; 

 lesser diameter, 7.6 mm. 



A translation of Gundlach's statement relative to the animal of this 

 species follows : I am using here the generic name Gyclotus because I 

 consider the species more nearly related to Megalomastoma than Cyclo- 

 stoma. The animal is very similar to that of Megalomastoma^ as well 

 as its mode of life under decaying leaves in the dark forest at the 

 sugar plantation Felicitas in the region of Enramada. The animal is 

 bright rose-red, with the head a little darker within, the antennae are 

 cinnabar red and the forehead crossed by wrinkles. In crawling the 

 always very dirty shell is carried almost perpendicular. 



CROCIDOPOMA (CYCLOCUBANA) GUNDLACHI, new species 



Shell depressed-helicoid, horn colored. Nuclear whorls about 1.5, 

 Vv-ell rounded, smooth ; postnuclear whorls strongly rounded, circular 

 in cross section, with strongly channeled suture. The postnuclear 

 whorls are marked by narrow, strongly elevated spiral cords, which 

 vary in number in the different subspecies and which increase in num- 

 ber by intercalation as the shell increases in size. The spaces between 

 the spiral cords are wider than the spiral cords and they, as well as the 

 cords, are crossed by incremental lines. Periphery well rounded ; base 

 broadly, openly umbilicated, and marked like the spire; the same 

 sculpture extends into the umbilical wall. The last portion of the 

 last whorl may be adnate to the preceding turn or slightly solute. 

 The operculum is typically that of the subgenus. 



The species occupies the mountain area of Oriente Province. We 

 are recognizing tliree subspecies : 



KEY TO THE SUBSPECIES OF CROCIDOPOMA (CYCLOCUBANA) GUNDLACHI 



Spiral cords less than 25 ignotum 



Spiral cords more than 30. 



Greater diameter more than 10 mm gundlachi 



Greater diameter less than 9 mm wrighti 



