62 STREPTAXIS. 



S. REGIUS, Lobbecke. PL 16, figs. 10, 11. 



Shell subglobosely, conoidal, widely and perspectively umbili- 

 cated ; whorls 7j, regularly increasing, very finely filiformly 



costulate ; lip not reflected ; white. Diam., 31 mill. 



Brazil? 



Found in an old collection, of which it formed a part for 

 about a century at least. 



S. WAGNERI, Pfeiffer. PI. 12, figs. 9-11. 



Widely umbilicated, depressed ; whorls 6, closely costulate 

 above, smooth beneath, subangulate at the periphery ; yellowish 

 white or waxy white, shining ; lip white, shortly reflected. 



Diam., 20 mill. 



Brazil. 



It is S. Coffreanus, Moricand, and perhaps Artemon planu- 

 latus, Beck. 



S. ROLLANDI, Bernardi. PI. 12, figs. 12, 13. 



Shell profoundly umbilicated, rather flattened and rugosely, 

 malleately plicate above, convexly inflated and regularly plicate 

 below ; whorls 7, the last obsoletely tricarinate, the first near the 

 suture, the second on the upper part of the whorl, the third 

 around the wide, perspective umbilicus ; peristome not reflected ; 



whitish. Diam., 20 mill. 



Brazil ? 

 S. PATVANUS, Pfeiffer. PL 12, figs. 7, 8. 



Convexly conical, rather thin, shining, pellucid ; whorls 7J, 

 slowly increasing, suture thread-margined, lightly striulate 

 above, smooth below, marked by several variciform striae; 

 hyaline white ; umbilicus narrow ; margin of aperture shortly 



reflected. Diam., 6*5 mill. 



Brazil. 

 S. CONOTDEUS, Pfeiffer. PL 12, figs. 19, 20. 



Somewhat regularly conoidal, moderately solid ; whorls 7, 

 here and there varicose, ribbed striate above, smooth below, the 

 periphery angulated ; narrowly umbilicated ; peristome narrowly 

 reflected ; greenish white. Diam., 18 mill. 



Venezuela (Ernst). 



