110 



BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



the outer expanded all around, forming a conspicuous auricle at the 

 posterior angle; the inner decidedly exserted, particularly so on the 

 outer lip. Operculum typically haitipomid. 



The specimen described and figured (U.S.N.M. No. 355340) is one 

 of four collected by Parker in Rio Amino, Dominican Republic. It has 

 a little over 4 whorls and measures : Height, 10.5 mm. ; greater diameter, 

 5.9 mm,; lesser diameter, 4.9 mm. The type came from Rio Amino. 



U.S.N.M. No. 355341 contains 3 additional specimens received from 

 C. W. Johnson labeled "Santo Domingo." 



Five of these specimens yield the following measurements: 



In its moderately distantly spaced axial ribs, this species resembles 

 H. poolei, from which its more slender form easily distinguishes it. 



HAITIPOMA CINCLIDODES (Pfeiflfer) 



Plate 16, Figure 6 



1852. Cistula cinclidodes Pfeiffer, Monographia pneumonopomorum viventium, 



vol. 1, pp. 277-278. 

 1854. Cyclostoma cinclidodes (Cistula) Pfeiffer, Proc. Zool. Soc. London, 1852, 



p. 142. 

 1854. Cyclostoma cinclidodes Pfeiffer, Martini-Chemnitz Conchylien Cabinet, 



vol. 1, sect. 19, p. 369, pi. 47, figs. 25-26. 

 1858. Cistula cinclidodes Pfeiffer, Monographia pneumonopomorum viventium, 



suppl. 1, p. 135. 

 1863. Chondropoma cinclidodes Reeve, Conchologia iconica. No. 81. 

 1920. Parachondria (Parachondria) cinclidodes Henderson and Bartsch, Proc. 



U. S. Nat. Mas., vol. 58, p. 66. 



Shell cylindroconic, yellowish white, with narrow, interrupted spiral 

 bands of pale brown. Of these bands, five occur between the summit 

 and suture, while a much broader one is present on the base a little an- 

 terior to the periphery. Interior of the aperture yellowish white; peri- 

 stome white. Nuclear whorls decollated in our specimens. Postnuclear 

 whorls well rounded, narrowly shouldered at the summit, and marked by 

 slender, retractively slanting axial riblets, of which 58 occur on the first 

 of the remaining turns, 78 on the second, and 90 on the last. The axial 

 riblets are not all of the same strength and spacing. A few heavier, more 

 distantly spaced elements are usually followed by slender, more closely 

 approximated lamellae. These riblets become slightly expanded at the 

 summit, and at irregular intervals two or sometimes three are gathered 



