62 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



Genus MELAPIUM H. and A. Adams. 



MELAPIUM BULBOSUM Wood. 



Cat. No. 186743, U.S.N.M., one specimen from Port Alfred (Coll. 

 No. 102). 



Cat. No. 250442, U.S.N.M., one from the same locality (Coll. No. 

 1315). 



Family SCALIDAE. 



Genus EPITONIUM Bolten. 



EPITONIUM AFRICANUM, new species. 

 Plate 9, fig. 2. 



Shell large, elongate-conic. (Nuclear whorls decollated in all our 

 specimens.) Postnuclear whorls well rounded, marked by narrow, 

 lamellose, retractive axial ribs, of which 16 occur upon the first to 

 fifth; 20 upon the sixth and the penultimate turn. These ribs form 

 continuous lines on the spire. Periphery of the last whorl well 

 rounded. Base with a single narrow spiral cord, a little anterior to 

 the periphery. Sutures very strongly constricted; entire surface of 

 spire and base marked by very slender incremental lines and ex- 

 ceedingly fine, microscopic, spiral striations. Aperture oval; outer 

 lip thin; inner lip thick; strongly curved and decidedly reflected; 

 parietal wall covered by moderately thick callus, which renders the 

 peristome complete. 



The coloration of the type is as follows: A narrow band of brown 

 separated from the summit by a white area, about as wide as the 

 band. This band is only present in the intercostal spaces. The 

 brown does not extend up on the ribs. A second, much wider band 

 borders the basal cord posteriorly. A third, somewhat paler, is 

 immediately anterior to the basal cord. In addition to these, a 

 series of very obliquely slanting brown lines occur on the middle of 

 the white space inclosed between the brown band at the summit and 

 the cord immediately below the periphery. These markings appear 

 much stronger within the aperture. 



The type and another specimen, Cat. No. 186837, U.S.N.M., come 

 from Port Alfred (Coll. No. 204). The type has lost the nuclear 

 whorls and probably the first postnuclear whorl. The seven and a 

 half remaining measure : Length, 31 mm.; diameter, 13.3 mm. Cat. 

 No. 187035, U.S.N.M., contains two specimens from Port Alfred 

 (Coll. No. 572). One of these is typically colored; the other is pale 

 brown with white ribs. Three additional lots from Port Alfred are 

 in the collection of the United States National Museum, Cat. No. 

 187036, one specimen (Coll. No. 573). Cat. No. 249717, two speci- 

 mens (Coll. No. 989). Cat. No. 249718, three specimens (Coll. 

 No. 990). 



