\ 



GENUS PYRAMIDELLA. 



sion in an oblique canal. The lip is thin and arcuated. The 

 colurnella is imperforate at its base ; it is slightly arcuated, 

 thin, furnished with three folds, the first more strongly marked 

 than the others, which are a little oblique. 



Length 9 lines. Width 4 lines. 

 Inhabits the seas of the Isle of France. 



This little shell and the preceding, have so constant an anal- 

 ogy, that they should be considered as the same species ; that 

 which we have just described, is a variety of the plicata, differing 

 from it only in its coloring, which is wholly white, and by its 

 narrower and slenderer form. 



5. PYRAMIDELLA MACULOSA, LAM. The Spotted Pyra-^ 



midella. )f (f t fi, ~~{j % Jt? $ *~~ 



(Collect. MASS. LAM.) LIST., pi. 844, fig. 



PI. II, fig. 5, et 5 a, young. 

 P. testa turrito-subulata, longitudinaliter striata, albida, maculis punctisque 

 rufis sparslm picta ; anfractibus numerosis ; ultimo spira multo breviore. 



Shell elongated, turreted, brilliant, pointed at its summit, 

 slightly widened at its base, of a grayish white color, sometimes 

 inclining to red, spotted with numerous brown spots arranged 

 in transverse series, three in number upon each whirl, and five 

 upon the lower ; upon its surface are seen large, brown, dull, 

 and irregular spots ; sometimes the points which adorn the shell 

 are united, and form undulating, longitudinal lines ; spire formed 

 of fifteen or sixteen slightly convex, distinct whirls ; suture 

 linear, shallow. The lowest whirl is short, and not perforated 

 at the base. Aperture small, sub-ovate, and at its depth are 

 seen indistinct grooves ; it is terminated at its base by a small, 

 narrow, and shallow groove. The colurnella is somewhat ar- 

 cuated, and presents three unequal folds towards the base : the 

 first is most projecting, and runs almost horizontally ; the two 

 others are small, oblique, and parallel. Right lip arcuated, 

 thin, sharp, slightly convex. 



Length 20 lines. Width 7 lines. 



