Tertiary.'] PALEONTOLOGY OF VICTORIA. [Molluica. 



V. digitalina ; in this variety the teeth sometimes reach 6 or 7. A 

 similar range of variety is to be found in the present Australian 

 species, which, in this respect, as in almost all others, is such an exact 

 representative of the European V. cingulata of the same age that 

 I have named it V. anti-cingulata as a representative of it. The 

 obtuse swollen papillary " pullus " to the top of the spire readily 

 separates it generically on comparison of specunens, and the sutural 

 space of the Australian species is never so deep or concave as in 

 its European prototype, in which also the plaits on the columella 

 are very much less conspicuous and more oblique, the anterior one 

 alone approaching the size of the four on the V. anti-cingulata. 

 The spire has one sculptvired whorl fewer than in V. cingulata of 

 Germany. There is no living species like it. 



Very abundant, with occasionally the /3 var., and more rarely 

 the a var. persulcata, in the Tertiary sands of the Bird Rock, beds 

 A*" 22 and 21, less so in A'^ 23 ; both varieties common in the 

 sandy beds A** 24. 



Explanation or Figukes. 



Plate VI.— Fig. 2, front view of average specimen, natural size. Fig. 2a, do., back view. 

 Fig. 3, young specimen, natural size. Fig. 4, outline of spire magnified 2 diameters. 



Note. — In the larger specimen figured, the ribs are str.aighter or less sigmoid th.an usual, 

 and the strife rather more distinct than in many specimens ou the posterior or sutural half of 

 the body whorl. 



Plate VI., Fm. 5. 



VOLUTA ANTI-SCALARIS (McCoy). 



Descuiption. — Ovate, moderately ventricose, rather abruptly attenuated 

 towards the front; spire moderately acute, apical anc-le 05° to 70°, of 4 to 5 whorla 

 and a rounded, swollen, smooth, oblique nucleus at the tip of 1^ turns; body whorl 

 with about IG to 24 angular slightly sigmoid longitudinal ribs extending rather less 

 than half way to the front, narrow and sharp in the young, wider and more obtusely 

 angular in adults, becoming gradually obsolete in front, each ending in a sharp 

 conical tubercle crowning the obtusely angulated shoulder ; a second row of smaller 

 conical pointed tubercles surmounts the larger on each whorl; the space between the 

 two rows is deeply concave and rather wider than the interval between the correspond- 

 ing larger tubercles; the space between the upper row and the suture is flattened, 



[ 2G ] 



