ODONTOSTOMUS. 73 



m3lla ; three compressed folds within the expanded outer and basal 

 margins, the upper fold smallest. Margins joined by a thin callus. 

 Length 20, diam. 10J, length of aperture 8, width 6 mill. (Kobelt}. 



Argentina : Sierra de Cordova (Doring). 



Bulimus (Odontoslomus) doeringii KOBELT, Jahrb. d. D. Malak. 

 Ges. ix, 1882, p. 5, pi. 1, f. 6, 6a. Not B. (0.) doeringii Kobelt, 

 Jahrb. v. 1878, p. 135. 



A very short, stout species, with rapidly-tapering spire, and teeth 

 arranged as in the fusiform species. 



Group of 0. charpentieri. 



Rather small, slender species, varying from finely striate to costu- 

 late or ribbed, with five (rarely six) teeth developed: parietal and 

 columellar lamellae, upper and lower palatal folds, the latter basal in 

 position, and a suprapalatal fold. The jaw has 13-15 plaits. 



All the known species are Argentine except 0. kuhnholtzianus from 

 Montevideo; and it is likely that there will be some reduction in 

 their number when the numerous described forms are more fully 

 known ; though obviously the region is prolific in species and varie- 

 ties, and doubtless many others remain to be found in the Sierras of 

 Western Argentina. 



Many of the species were described all too briefly by Doering in 

 the Boletin de la Academia de Ciencias de Cordova in 1875, the diag- 

 noses being copied by Kobelt in the NachrichtsUatt der Deutschen 

 Malakozoologischen Gesellschaft for 1876, and by Ffeiffer in the 

 Monographia Heliceorum, vol. viii (1877). Later in 1875 Doering 

 gave extended descriptions of the same species in the Periodico 

 Zoologico (Cordova) ; the latter being unquoted by the German 

 authors. I do not have the Boletin for 1875, and quote references 

 thereto from Pfeifter and Kobelt, giving descriptions from the 

 Periodico Zoologico for the same year. 



A few of the species have been figured in the Jahrbucher, 

 from specimens sent by Dr. Doering. In the Periodico Zoologico, 

 1877, additional species are defined, which are known only by the 

 diagnoses in that rare journal, herein translated. Most of them 

 remain unknown in collections outside of South America. Their 

 similarity in teeth will make the species difficult to identify, the 

 differences being chiefly those of color, sculpture, size and general 

 form. 



