HISPANIOLAN AND BAHAMAN ANNULARIIDAE 165 



U.S.N.Al. No. 402609 contains 20 specimens collected by Orcutt near 

 Gimbi Town. 



U.S.N.M. No. 402030 contains 355 specimens collected by Orcutt on 

 the east bank of Gimbi River near Saltrou. 



U.S.N.M. No. 402585 contains 26 specimens collected by Orcutt on 

 the first hill east of Saltrou near the sea. 



U.S.N.M, No. 402674 contains 279 specimens collected by Orcutt on 

 a hill east of Morne Rouge. 



U.S.N.M. No. 403458 contains 56 specimens collected by Orcutt in 

 the mountains east of Morne Rouge, near the sea. 



This is most nearly related to W einlandipoma milleri, from which its 

 larger size and more distantly spaced and less numerous ribs will readily 

 differentiate it. 



Genus TROSCHELVINDEX H. B. Baker 



1924. Troschehindex H. B. Baker, Nautilus, vol. 37, p. 90. 



Shell elongate-conic, marked by rounded axial ribs and spiral cords, the 

 combination forming a fenestrated pattern. Some of the axial ribs are 

 gathered into conspicuous tufts at the summit. Peristome double. Oper- 

 culum with a well-elevated, obliquely outward-directed spiral lamella. 



Type species : Cyclostoina candeana Orbigny = Troschehindex cande- 

 ana (Orbigny). 



KEY TO THE HISPANIOLAN SPECIES OF TROSCHELVINDEX 



Tufting at the summit of the whorls rare. 



Shell stout tortuensis 



Shell slender miragoanensis 



Tufting at the summit of the whorls not rare. 

 Outer peristome expanded. 



Umbilical wall with 1 spiral cord laferrierensis 



Umbilical wall with 6 spiral cords abbotti 



Outer peristome not expanded gonaivensis 



TROSCHEI.VINDEX TORTUENSIS, new species 



Plate 29, Figure 3 



Shell broadly elongate-conic, flesh-colored, with irregular axial streaks 

 of rust brown. Nuclear whorls 2, inflated, strongly rounded, microscop- 

 ically granulose. Postnuclear whorls well rounded, slightly shouldered 

 at the summit, and marked by retractively slanting axial ribs, which are 

 low and rounded and become slightly expanded toward the summit, 

 which they crenulate. Of these axial ribs, 73 are present on the last 

 whorl. The spiral sculpture consists of low rounded threads equaling the 

 axial ribs in strength and rendering these feebly tuberculated at their 

 junction. Of these spiral threads, 13 are present between the summit and 

 the periphery. The combination of the axial ribs and the spiral threads 

 gives to the whorls a fenestrated pattern. Suture well constricted. Pe- 



