HISPANIOLAN AND BAHAMAN ANNULARIIDAE 



117 



border falls about one-fourth of the width of the whorl short of reach- 

 ing the outer margin of the chondroid plate; the spaces between the 

 lamellae in the lamellar region are also covered partly by a pseudo- 

 lamella. 



U.S.N.M. No. 162935 contains 55 specimens collected by Henderson 

 and Simpson at Cap-Haitien, one of which I have figured. It has a 

 little over 4 whorls and measures: Height, 11.2 mm.; greater diameter, 

 5.2 mm. ; lesser diameter, 4.7 mm. This is the type locality. 



U.S.N.M. No. 379910 contains 119 specimens collected by Eyerdam 

 under leaves at the mouth of a tunnel at Cap-Haitien. 



One hundred of these specimens yield the following average measure- 

 ments : 



Shell elongate-conic, pale brown. Nuclear whorls decollated in all our 

 specimens. Postnuclear whorls well rounded and marked by retractively 

 slanting axial riblets, of which 153 are present on the last whorl in the 

 type. These riblets are very closely approximated and are separated on 

 the last whorl by mere impressed lines. The spiral sculpture consists of 

 obsolete elements that merely render the axial ribs feebly thickened in 

 regular spiral series. Suture very strongly constricted, very narrowly 

 channeled, rendered denticulated by the axial riblets. Periphery inflated, 

 strongly rounded, and marked by the continuation of the axial ribs, 

 which cross the short openly umbilicated base and pass on to the um- 

 bilical wall. No marked spiral threads are present on the base. The um- 

 bilical wall, on the other hand, bears eight spiral threads. Last whorl 

 solute for about one-fifth of a turn, oval, with a slight angulation at the 

 posterior angle which extends over the solute portion of the last turn 

 as a carina. Peristome simple, slightly expanded and slightly reflected. 

 Operculum typically klatteid. 



The type (U.S.N.M. No. 504042) was collected by Henderson and 

 Bartsch at Port-au-Prince. It has 4.4 whorls remaining and measures: 

 Height, 12.9 mm. ; greater diameter, 6.4 mm. ; lesser diameter, 5.0 mm. 



U.S.N.M. No. 355358 contains 16 topotypes. 



U.S.N.M. No. 134924 contains 8 additional specimens without specific 

 locality. 



