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, h} T aline, subvaricose ; pillar lip twisted and 

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



Prince's 7s/., 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, Albcrs. PL 12, figs. 4-6. 



More depressed, with much wirier umbilicus than the prece- 

 ding species, whorls 7 J, 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. PI. 16, figs. 8, 9. 



Depressed globose, with elevated spire, and moderate 

 umbilicus; -whorls 6, arcuatel} r 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. 



