SYKES : NEW FORMS OF CATAULUS. 



57 



Cataulus marginatus vai. notata, n. vai. 



(tl^- 3-) 



Shell larger than the typical form ; shape more pyramidal ; whorls more 

 flattened ; longitudinal striation almost absent ; the malleation in the variety 

 is much stronger, especially on tiie last half of the last whorl, where a 

 second carina, above the normal one, is often present, leaving a smocjth area 

 between them : mouth duplex, pale flesh colour. 



Alt. 17 ; diam. max. (last whorl) 5.5 millim. 



Fig. /^ — Cataulus marginatiis 

 ^ar. notata, n. var. X 2. 



Fig. 4 — Catalus congena, 

 ' n. sp. X 2. 



Cataulus congener, n sp. 



(Fig. 4) 



Shell elongately pyramidal, rimate, yellow, becoming tinged with red- 

 brown on the earlier whorls, these latter are smooth, while the rest of the 

 shell is closely, finely, longitudinally striate ; suture well impressed ; whorls 

 yi, convex ; umbilical region moderate in size, sculptured as the rest of 

 the shell ; aperture sub-circular ; lip white, double, the outer part well 

 reflected and thin at the edge, slightly produced at the right upper margin, 

 the inner part circular and produced ; basal canal small, the carina being 

 whitish. 



Alt. 16.5 ; diam. max. (last whorl) 6 millim. 



Resembling in form a dwarf ('. am-f^Uf^, but se[)arable by mt'^r alia, the 

 shape of tiie (niter lip, and the duplication of the lip as also by the small 

 basal canal. 



