1907.] 



NATURAL SCIENCES OF PHILADKLPHIA. 



213 



whorls and the first whorl is small, and not large and swollen as in P. 

 papyrotia. In these respects it is more closely allied to most other 

 Miocene forms and to some of the recent species of the Indo-Pacific 

 region. It is especially near to the form from the Oligocene (or 

 Miocene) beds of Santo Domingo which Gabb" refers to P. papyratia. I 

 have examined Gabb's specimens and find them to be identical with 

 the better preserved forms from the Oligocene (or Miocene) beds of 

 Bowden, Jamaica. In their apical characters they are all clearly dis- 

 tinct from P. poprjratia. I have selected the Bowden race as typical 

 of this new species; the t}q:)e specimen for the following description 

 being one of the lot numbered 11,144 in the collection]of the Academy 

 of Natural Sciences of Philadelpliia. 

 Pyrula pilsbryi n. s. 



Locality. — Bowden, Jamaica, W. I. 



Horizon. — Bowden beds, Oligocene (or Miocene). 



Whorl 1. — Smooth and rounded. 



Whorl 2. — Smooth and rounded for about one-half or three-quarters 

 of a whorl, and then the cancellated stage with its fine ribs and spirals 

 sets in. 



Whorl 3. — Cancellated stage. Fine ribs and spirals. 



Wniorls 4, 5. — Cancellated stage, with secondary sets of spirals 



^:^Sx, 



Fi^. 1. — Pyrula pilsbryi n.s. Bowdoii Fig. 2. — Pyrula pilsbryi duplinensis. 

 beds. Bowden, Jamaica. Lengtli Miocene. Duplin County, North 



= 42 mm. Carolina. 



' "Topography and Geology of Santo Domingo," Trans. Am. Phil. Soc, Vol. 

 1.5, p. 223, 18S1. 

 15 



