Reference List of South African Non-marine Mollusca. 229 



whorls, the last comprising practically the entire shell. Aperture 

 long and narrow, furnished with one receding white rib half-way up 

 the outer lip ; a fold of medium size at the base of the columella ; 

 and three sharp white parietal plaits at almost equal, but gradually 

 decreasing distances between the columellar fold and the top of the 

 aperture. Peristome acute, of paler colour. Columellar margin 

 thickly reflexed, almost adnate. 



Shell 9'6x5 - 5 ; aperture 7'5 ; last whorl 8'8 mm. 



Type in British Museum. 



Hab. NATAL. Durban Bay ; mouths of Umlaas and Umkornaas 

 Elvers (Burnup). 



A member of the group comprising M. granifer, Mouss., from 

 Java; sulculosus, von Mts., from Amboina ; corticinus, Morelet, from 

 Mauritius ; striatns, Pease, from Tahiti, and scmisulcatus , Mouss., 

 from Samoa, to the last two of which it must be very nearly allied. 

 The half-furrowed appearance of the new species, though usual, is 

 not always constant, some shells being covered all over with spiral 

 grooving, in which state they much resemble striatus ; but owing to 

 the widely divergent distribution, it is most improbable that the three 

 species can be the same. 



482. MELAMPUS UMLAASIANUS (Krauss). 



1844 Auricula umlaasiana, Krs., Kiist., Conch. Cab. p. 43. pi. 6 (1843), 

 f. 16-18. D.F. 



1856 Mclampus uiiilaasianus, Krs., Pfr., Mon. Auric, p. 34. D. 



1857 Cat. Auric, p. 24. D. 

 Not Auricula umlassiana, " Krs.," Sow., Conch. Icon. pi. 6, f. 48. 



Type in Stuttgart Museum. 



Hab. NATAL. Mouth of Umlaas Eiver (Krauss). 



var. OBSCUKUS, Kiister. [S.A.M.] 



1844 Auricula umlaasiana, Krs., var. obscura, Kiisfc., Conch. Cab. 

 p. 44. pi. 6 (1843), f. 19, 20. D.F. 



Hab. NATAL. Mouth of Umlaas Eiver (Krauss). Isipingo 

 (Burnup). 



Specimens from Isipingo, apparently referable to this variety, 

 have of late years been erroneously attributed to M. castaneus, 

 Miihlf. ( = A. fusca, Phil.), a Sandwich Island species. M. avellana, 

 Morelet, from Mauritius, is also near akin, but it appears inadvisable 

 to place either of the three in synonymy. 



