6 2 



Bulletin 35 



310 



Page 78 



Cancellaria scalatella n. sp.Pl. II, f. 4.* 



Turreted, umbilicate, spirally striate by numerous close 

 spiral threads, more elevated on the stout rounded longitu- 

 dinal variciform ridges of which there are 6 or 7 on a 

 whorl. Suture very deeply sunk. Whorls about 7, slightly 

 rounded, angulate and crowned above by the ridges. 

 Aperture almost triangular, rounded above, angular and 

 formed into an obsolete canal anteriorly. Outer lip sharp, 

 grooved within. Inner lip continuous, thin, sharp, 

 slightly reflected and bearing two folds. Base angulate, 

 perforated by a small round umbilicus. 



Related to C. varicosa Brocchi (Miocene, Piedmont); 

 but smaller and of somewhat stouter figure. The spiral 

 striae are coarser, and the peristome is finely grooved 

 instead of being coarsely dentate only. In C. varicosa 

 the spiral striae are crossed by very fine longitudinal ones, 

 which do not exist in C. scalatella. The most striking 

 difference however is that the whorls are rounder and the 

 suture much more deeply sunk in C. scalatella, whilst the 

 longitudinal ridges project upon the angle of the whorls so 

 as to give a coronate appearance. 



The three Cancellariae hitherto described from the Ja- 

 maican miocene are all akin to European fossils of the 

 same date ; but two of them belong to the type of the re- 

 cent C. reticulata. The present is of more decidedly mio- 

 cene aspect than either of the three previously described. 



Ovulum immunitum n. sp. PI. I, f.7 f 



Fusiform-elongate, pointed at both extremities. Outer 

 lip thickened, extending in a nearly regular slight curve 

 from the posterior to the anterior canal ; slightly dilated 

 anteriorly. Inner lip with two strong folds at the ante- 

 rior end. Aperture as long as the shell ; narrow poster- 



[*Geological Magazine, vol. II, 1874, pi. 17.] 

 [f " " vol. ii, 1874, pi. 16.] 



