188 



NATICA noDATZI. 



NOTE XV. 



AN UNDESCRIBED NATICA 



M. M. SCHfiPMA.N. 



Natica Rodatzi Scliepman, 



Shell oblong-globose, deeply umbilieated, apex obtuse, 

 whorls 4, upper ones rounded, smooth ; last whorl slightly 

 concave and striated at the suture, then rounded. Aperture 

 semilunar, columellar margin thickly callously enamelled 

 at the upper part, umbilicus moderate, with a conspicuous 

 central callosity. Shell white, opaque near the suture. 

 Alt. 26, diam. maj. 24, Apert. alt. 19, lat. 10 mill. 

 H a b. Red Sea (Mr. Ruyssenaers). 



This shell was in the collection of 

 the Museum with the name Rodatzi 

 Dunker. As I could find no description 

 I asked Prof, von Martens for assistance, 

 as Bunker's collection is now in the Berlin 

 Museum. Mr. vou Martens writes, that 

 the shell agrees with Dunker's Rodatzi 

 but has not been described. So I describe 

 it with the name given by Dunker, but 

 /•^ according to the rules of nomenclature 



/ not on his authority. 



\ The species seems to be allied to N. 



intemerata Philippi, from the west coast 

 of America, but is, according to the 

 figures, characterized by the rounded upper whorls and 

 concave last one, which, on account of the remote locali- 

 ties, seems sufficient to keep them separate. 



Rhoon near Rotterdam, June 1900. 



-'^^ 



Notes from the Leyden Museutn, Vol. >CX II. 



