100 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



south side of the bay, 5 miles west of Le Mole, Haiti. It has 4 whorls 

 remaining and measures : Height, 14.7 mm. ; greater diameter, 8.8 mm. ; 

 lesser diameter, j.j mm. 



The fusion of the axial riblets at the summit will at once distinguish 

 this from the other Haitian members of the genus. 



U.S.N.M. No. 504020 contains 79 topotypes from the same source. 



U.S.N.M. No. 504021 contains 121 specimens collected between Jean 

 Rabel and Le Mole in crevices of coral rocks between the bay and the 

 seashore. 



U.S.N.M. No. 504022 contains 2 specimens collected near Cotes de 

 Fer. 



COl^ONINA MOUSTIQUENSIS, new species 



Plate 15, Figure 5 



Shell elongate-ovate, pale orange. Nuclear whorls decollated in all our 

 specimens. Postnuclear whorls decidedly inflated, strongly rounded, and 

 marked by very fine, slightly retractively curved, closely spaced axial 

 riblets, of which 167 are present on the last turn. In addition to the axial 

 riblets, the shell is marked by heavy spiral keels, of which 8 are present 

 between the summit and the suture on the last turn and 6 on the base, and 

 14 are apparent in the outer portion of the umbilicus. The junctions of the 

 axial ribs and the spiral threads form minute rounded nodules, while 

 the spaces enclosed between them form rectangular pits with their long 

 axis parallel with the axial sculpture. Suture strongly constricted, 

 rendered slightly denticulated by the axial ribs. Periphery inflated, 

 strongly rounded. Base moderately long, strongly rounded, narrowly um- 

 bilicated, and marked by the continuation of the axial ribs and spiral 

 cords referred to above. The axial ribs also extend into the umbilicus. 

 Aperture broadly oval ; peristome double, the outer broadly expanded 

 on the inner lip and reflected over the preceding turn at the parietal wall. 

 On the basal' and outer lip the outer peristome is narrow; the outer 

 peristome is denticulated all around and forms a small auricle at the 

 posterior angle. The inner peristome is slightly exserted, reflected and 

 appressed to the outer. Operculum with a heavy calcareous deposit, 

 which consists of fused, retractively curved riblets that suggest a lamella. 

 The calcification does not extend to the outer limit of the turns of the 

 basal chondroid plate but leaves about a quarter of the distance of the 

 basal plate showing. 



The type (U.S.N.M. No. 573641) was collected by Mr. and Mrs. E. 

 C. Leonard east of Moustique Bay, Haiti. It has 4.2 whorls remaining 

 and measures: Height, 13.7 mm.; greater diameter, 7.3 mm.; lesser 

 diameter, 6.7 mm. 



This species suggests Colonina tortuensis but can readily be differenti- 

 ated from this by its much more inflated form. 



U.S.N.M. No. 504023 contains 15 topotypes from the same source. 



