298 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



ANNULARIA (ANNtJLAROPS) ATTENUATA MINAENSIS, new subspecies 



Plate 32, Figure 10 



This subspecies appears restricted to Mogote La Mina, sometimes 

 called Encinar Alto, northeast of Banos de San Vicente. 



It is easily distinguished from the other two subspecies by the red- 

 dish peristome and interior of aperture. 



The type, U.S.N.M. No. 356260, has 3.8 whorls remaining and 

 measures: Length, 15.8 mm.; greater diameter, 10.0 mm.; lesser 

 diameter, 8.2 mm. 



ANNULARIA (ANNULAROPS) ATTENUATA MORSEI, new subspecies 



Plate 32, Figure 6 



This subspecies was collected on Pan de Azucar during the Tomas 

 Barrera Expedition. It is named for C. K. Morse, the engineer in 

 charge of the Matahambre Mine, who was very helpful on that 

 expedition. 



In this, the westernmost known race, the axial ribs are strong and 

 more distantly spaced than in the other races. The junctions of the 

 axial ribs and spiral threads form somewhat pointed tubercles, which 

 are retractively bent so that they almost overlap like tiles. 



The type, U.S.N.M. No. 356239, has 4 whorls remaining and meas- 

 ures: Length, 13.7 mm.; greater diameter, 8.3 mm.; lesser diameter, 

 7.0 mm. 



ANNULARIA (ANNULAROPS) ATTENUATA ATTENUATA, new subspecies 



Plate 32, Figure 5 



This subspecies is known from the eastern end of the Sierra de San 

 Andres; Pico Grande, El Zumbido; Sitio de la Sierra and Mogotes de 

 Talavera and Vegas Nuevas, near La Palma. 



In coloration it resembles A. (A.) attenuata morsel, from which its 

 very fine and closely spaced axial ribs will at once distinguish it. 



The type, U.S.N.M. No. 493466, comes from Pico Grande; it is a 

 complete specimen having 6.4 whorls and measuring: Length, 14.9 

 mm.; greater diameter, 8.4 mm.; lesser diameter, 6.7 mm. 



ANNULARIA (ANNULAROPS) PLICATA, new species 



Plate 30, Figure 8 



Shell elongate-ovate, flesh colored, with a pinkish tinge on the last 

 whorl, turning consecutively deeper pink toward the first of the post- 

 nuclear whorls. Nuclear whorls flesh colored; peristome flesh colored. 

 Nuclear whorls 2, well rounded, nucroscopically granulose, forming a 

 conspicuous apex. Postnuclear whorls inflated, strongly rounded, 

 marked by almost vertical, strong, closely spaced axial riblets, of 



