;er feuic gftnerallv only c 



Picus no di f e ru s , Gabb. 



PI. 1, fig. 5 and 8* 



Shell pear shaped, with large body whorl; spire low, 

 body whorl forms two thirds width of spire; an upper and 

 lower angulation present, the former the more distinct; 

 snell ornamented with twelve very prominent nodes to each 

 whorl, these consist of two spiral rows of vertically 

 elongated nodes, the upper row being so spaced as to alter- 

 nate with the lower; both the lower and upper nodes are 

 elongated and have from one to three cusps which are formed 

 where the heavy spiral lines cross the raised area of the 

 node; shell marked by twelve to fifteen spiral lines, be- 

 tween each of which are three finer lines of which the 

 middle one is the wider; spiral lines crossed by numerous 

 very fine longitudinal lines; mouth opening semi-circular 

 to sub- triangular; outer lip thin; canal medium length, 

 recurved. 



This species is quite close to JP. kernianum, cooper, 

 of the Temblor formation, from which it differs as follows: -- 

 larger size, the maximum lengths being 120 and 60 mm., res- 

 pectively; the spiral lines on !F. nodiferus vary in width 

 and show a tendency to be wavy, while those on P. kernianum 



