1895. PROCEEDINGS OF THE NATIONAL MUSEUM. 3 



oblique and strongly reflected, united over the body by a well marked 

 callus, on which are two converging but not united lanielhe; basal part 

 of the peristome with two distinct transverse lamellte, outer lip broader, 

 receding with a single oblique tooth deeper in the aperture. Height, 

 5.5; major diameter, 13; minor diameter, 11 mm. 



Locality. — Hachita Grande and Huachuca Mountains, New Mexico. 



Distinguished from all other species by its three well-marked teeth 

 on the outer lip. 



Family PUPID.E. 

 Genus HOLOSPIRA, Martens. 

 Subgenus HOLOSPIRA ss. 



Axis with a plait in the penultimate whorl and with basal, parietal, 

 and peripheral lamelhe projecting into the lumen of that whorl. 



Type, H.pUocerei,, Pfeifter. The subgenus includes also H. goldfussii, 

 Pfeifl'er, and H. (joniostoma, Pfeiffer. 



Section BOSTRICHOCENTRUM, Strebel and Pfeffer. 



Axis moderate, with a continuous plait nearly the whole length but 

 with no lamellii?. 

 Type, H. tryoni, Pfeifl'er. H. veracruzianus also belongs here. 



Section HAPLOSTEMMA, Ball 



Axis moderate, with a short, stout, axial lamella in the penultimate 

 whorl only. 



Type, H. mearnsU, Dall. 



Section EUDISTEMMA, Dall. 



Penultimate whorl with a short axial and a parietal lamella only. 

 Axis moderate. Type, H. arizonensis, Stearns. 



Section DISTOMOSPIRA Dall 



Penultimate whorl with a short, strong, axial and a basal lamella 

 only. Axis moderate, smooth. Type, H. bilamellata, Dall. 



Subgenus METASTOMA, Strebel and Pfeffer. 



Axis smooth, without plait or sinuosity, penultimate whorl without 

 lamellne. Type, 11. loemeri, Pfeiffer. 

 This comprises most of the species usually denominated Holospira. 



Subgenus COELOSTEMMA, Dall. 



Axis vertically ribbed as in Coeloccnirum; shell otherwise as in Meta- 

 stoma. Type, H. eUsabctha', Pilsbry. 



Genus COELOCENTRUM, Crosse and Fischer. 

 Subgenus SPARTOCENTRUM, Dall. 



Axis as in BoHtricliocentrnm ; otherwise as in the type of the genus. 

 Type, G. irreyidare, Gabb. 



