THE CYCTjOPHORID LAND M0LLUSK9 OF AMjEKIOA 67 



This species was collected by Charles R. Orcutt on Gimbi Mountain 

 in the southwestern part of the southern peninsula of Haiti. 



The type, U.S.N.M. No. 535847, has 4.5 whorls and measures: 

 Height, 11 mm. ; greater diameter, 14 mm. ; lesser diameter, 10.8 mm. 



CROCIDOPOMA (CROCIDOPOMA) ABBOTTI, new species 



Plate 12, Figures 13-15 



Shell almost lenticular, white (it has lost its periostracum) . Nuclear 

 whorls? Postnuclear whorls strongly rounded, marked by slender, 

 well elevated, spiral keels, of which 6 are present between summit and 

 suture on the first, 8 on the second, and 9 on the last whorl. These 

 keels are only about one-fourth as wide as the spaces that separate 

 them. The first one near the summit is much stronger and broader 

 than the rest and is notched at the peristome to furnish a breathing 

 space. Suture narrowly and profoundly channeled. Periphery well 

 rounded. Base strongly rounded, marked by 6 slender spiral keels. 

 The umbilicus is very broad and profound. The wall on the last whorl 

 bears 5 spiral keels. The last whorl is solute for about one-thirtieth 

 of a turn. Aperture circular, very slightlyl oblique ; peristome simple, 

 except that it is rendered wavy by the spiral cords. Operculum ? 



The type, U.S.N.M. No. 356197, a broken specimen, has lost the 

 nuclear whorls and part of the last turn. The 2.3 whorls remaining 

 measure : Height, 6.3 mm. ; greater diameter, 10.5 mm. ; lesser diameter, 

 7.4 mm. This was collected by Dr. Abbott at "Cave, Savanna, 1 hour 

 west of Maniel Viejo, Bohoruco Mts.," southwest Dominican Republic ; 

 altitude, 2,510 feet. 



A young specimen, U.S.N.M. No. 389873, was collected by Gerrit S. 

 Miller at Polo, District Barahona, Bohoruco Mountains, altitude 2,000 

 feet, Dominican Republic. 



While I dislike to base a species on an imperfect specimen, for the 

 sake of completeness I am here doing so. 



CYCLOJAMAICIA, new genus 



Medium-sized aperostomids of almost lenticular form, with deeply 

 channeled suture and a decided narrow notch in the peristome at the 

 posterior angle of the aperture, which leaves on the preceding parts of 

 the whorls at this part of the shell a rough raised cord. Operculum 

 with a multispiral, strongly elevated, obliquely outward curved cal- 

 careous lamella between the turns of which project thin scalelike iSmbri- 

 ations, the outer extension of the basal chondroid elements ; on the in- 

 ner turns these are worn off to the length of the calcerous lamella, 

 while on the outer margin in perfect specimens they project to fully 

 triple the width of the calcareous lamella as partly overlapping, obli- 



