CUBAN ANNULARiroAE TORRE AND BART5CH 317 



ANNULARIA (DIPLOPOMA) ARCHITECTONICA ([Gundlach] Pfeiffer) 



Shell very elongate-conic, flesh colored, straw colored, or slightly 

 pinkish. Nuclear whorls almost 2, well rounded, microscopically 

 granulose, the last portion of the last turn showing the beginning of 

 the postnuclear sculpture. Postnuclear whorls well rounded, marked 

 by retractively slanting, rather closely spaced, somewhat wavy axial 

 riblets, of which 4 to 10 are gathered into broad hollow cusps at the 

 summit ; these cusps are separated by narrow intervals of shorter ribs ; 

 the spiral sculpture consists of low rounded tlireads. Suture strongly 

 constricted. Periphery well rounded. Base short, openly umbili- 

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

 threads. Last whorl solute for almost half a turn. The umbilical 

 wall is marked by the continuation of the axial riblets and by spiral 

 thi-eads, the junctions of which here and on the anterior portion of the 

 base form feeble scallops. Aperture broadly oval ; peristome double, 

 the inner moderately exserted and moderately reflected; the outer 

 moderately expanded, forming a conspicuous auricle at the posterior 

 angle. Operculum typically diplopomid. 



This species occupies parts of Oriente Province, where it breaks up 

 into the subspecies noted below. 



KEY TO THE SUBSPECIES OF ANNULARIA (DIPLOPOMA) ARCHITECTONICA 



Sculpture strongly developed. 



Axial ribs fine and closely spaced libanoensis 



Axial ribs not fine and more distantly spaced architectonica 



Sculpture feebly developed tanamensis 



ANNULARIA (DIPLOPOMA) ARCHITECTONICA LIBANOENSIS, new subspecies 



Plate 35, Figure 8 



This subspecies appears to range from Monte Toro through Monte 

 Libano to Monte Verde, north of Guantanamo, Oriente Province. 



The smaller size and greater number of axial ribs will readfly dis- 

 tinguish tliis from A. (D.) architectonica architectonica. 



The type, U.S.N.M. No. 356449, was coflected by Henderson and 

 Bartsch on Guaso River, Monte Libano, Guantdnamo, Oriente Prov- 

 ince. It has a little over 4 whorls and measures: Length, 14.0 mm.; 

 greater diameter, 7.6 mm. ; lesser diameter, 5.7 mm. 



ANNULARIA (DIPLOPOMA) ARCHITECTONICA ARCHITECTONICA ([Gundlach 



Pfeiffer) 



Plate 35, Figure 3 



1859. Cyclostoma (Diplopoma) architectomcum (Gundlach) Pfeiffer, Malakozool. 



Blatter, vol. 7, p. 73. 

 1861. Diplopoma architedonicum Bland, Ann. Lyceum Nat. Hist. New York, vol. 



7, p. 27. 



