STREPTAXIS, 61 



Genus STREPTOSTELE, 1866. 



Animal brightly red or yellow-colored, as in Streptaxis ; 

 central tooth of the radula narrow and very long. 



Shell achatinoid, Ir^aline, subvaricose ; pillar lip twisted and 

 thickened, outer lip expanded, reflected. S. lotophaga, Mor. 



Prince's IsL, Seychelles, Formosa. 



Section ELMA, H. Adams, 1866. Outer lip more or less 

 sinuous above, aperture without teeth, surface smoothish, 

 shining. S. Swinhoei, H. Adams. 



Section PTYCHOTREMA, Morch, 1852. Surface obliquely closely 

 ribbed-striate, aperture lamellarly toothed within, with corre- 

 sponding exterior constrictions or troughs. S. cyathostoma, Pfr. 



Genus STREPTAXIS, Gray. 

 Section ARTEMON, Pfeiffer. 

 S. CANDIDUS, Spix. PI. 12, figs. 1-3. 



Whorls 6-7, slowly increasing, the last not descending at the 

 aperture, ribbed striate above, smooth beneath ; margin of 

 aperture shortly reflected; yellowish white to light-yellowish 

 brown. Diam., 34 mill. 



Brazil. 



There is a variety faintly or obsoletely sculptured. The 

 synonyms are H. Spixiana, Pfr., and H. perspectiva, Wagner. 



S. INTERMEDIUS, Albers. PL 12, figs. 4-6. 



More depressed, with much wider umbilicus than the prece- 

 ding species, whorls 7|, subangulate at the periphery; margin 

 of the aperture not thickened, reflected only at the base ; 

 whitish, waxy, shining. Diam., 34 mill. 



Brazil. 

 S. GIGAS, E. A. Smith. PL 16, figs. 8, 9. 



Depressed globose, with elevated spire, and moderate 

 umbilicus; whorls 6, arcuately striate above, with traces of 

 revolving lines, smooth beneath ; lip simple. Diam., 33 mill. 



Between Lake Nyassa and the East Coast of Africa. 



The two specimens obtained were not adult. 



