112 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



tween them are shallow, impressed, narrow pits with their long axis 

 parallel with the axial sculpture. Periphery well rounded. Base moder- 

 ately long, narrowly, openly umbilicated, well rounded, and marked by 

 the continuation of the axial riblets and five spiral threads, which are a 

 little more distantly spaced and a trifle stronger than those on the spire. 

 Within the umbilicus 12 very slender additional spiral threads are pres- 

 ent. Last whorl slightly solute. Aperture broadly oval ; peristome double, 

 the outer expanded, slightly reflected, and extending a little beyond the 

 inner all around, forming a moderately large auricle at the posterior 

 angle; the inner peristome is slightly exserted and slightly reflected. 

 Operculum unknown. 



The type (U.S.N. M. No. 355346) was collected by Dr. W. L. Abbott 

 on Catalinita Island, Dominican Republic. It has a little over 4 whorls 

 and measures: Height, 7.3 mm.; greater diameter, 3.9 mm.; lesser di- 

 ameter, 3.5 mm. 



This is the smallest of all the Hispaniolan species. 



KISSLINGIA, new genus 



Shell of ovoid or turbinid outline, marked by axial ribs, which ex- 

 tend into the umbilicus. The spiral sculpture may consist of strong 

 threads rendering their junction with the axial ribs nodulose, or it may 

 be absent or merely indicated by a few faint nodules on the ribs near 

 the summit. The spiral sculpture, however, is always present on the 

 umbilical wall. Aperture ovoid; peristome simple, broadly reflected. 

 Operculum with a pseudolamella, that is, the retractively curved axial 

 riblets are fused at their outer edge to form a thin lamella, which ex- 

 tends part way across the turns, showing a part of the basal chondroid 

 plate at the outer edge. The lamella is thin and easily broken away; 

 when this is the case the retractively curved riblets between the pseudo- 

 lamella and the basal chondroid plate come in evidence. 



Type species: Kisslingla hinchensis, new species. 



KEY TO THE SPECIES OP THE GENUS KISSLINGIA 



Spire conspicuously nodulose. 



Shell of turbinid outline hinchensis 



Shell of ovate outline bahorucensis 



Spire not nodulose. 



Shell large, height more than 20 mm poloensis 



Shell smaller, height less than 16 mm clenchi 



KISSLINGIA HINCHENSIS, new species 



Plate 17, Figure 3 



Shell of turbinid outline, thin, semitranslucent, yellowish white, with 

 squarish brown spots, which are rather distantly spaced and arranged in 

 both spiral and axial series. Of these dots, three are present between the 



