292 TRANSACTIONS OF THE WAGNER FREE 



in 1864 at Barbados by Lieut. G. L. Fitzgerald, R. N., so that it is possible that 

 further exploration may reveal one or more species of the group still living 

 in the Antilles. It would be a singular fact if a genus which persisted from 

 the Miocene to the Pliocene in the immediate vicinity, in company with many 

 other forms still living, and which in its habits has nothing peculiar or 

 exceptional, should suddenly drop out of the fauna, while its neighbors and 

 near relatives were able to maintain their position without difficulty. 



Family PLEUROCERATID^. 



Genus GONIOBASIS Lea. 



Goniobasis sp. indet. 



A single specimen of a beautifully sculptured Goniobasis , resembling in a 

 general way, as nearly as I can recall it, G. Hallenbeckii Lea, was collected by 

 Mr. Willcox on the Caloosahatchie. Unfortunately, in packing for transpor- 

 tation to Washington this specimen was mislaid, and has not yet turned up, 

 so that the presence of the genus in the Caloosahatchie marls is all that can 

 be certified to at the present moment. 



Family LITIOPID^. 

 Genus ALABA A. Adams. 



There are several species of this group in the Tertiary of America, gen- 

 erally masquerading under other names : Cerithium moenensis Gabb, from the 

 Miocene of Santo Domingo and the Pliocene of Costa Rica, is an Alaba 

 much like A. tervaricosa Adams, and the same may be said of Rissoina 

 plicatovaricosa Heilprin (Proc. Ac. Nat. Sci. 1879, p. 214, pi. 13, fig. 12) from 

 the Claibornian. 



It may be noted that Litiopa occurs in the American Tertiary as early as 

 the Eocene. Cerithioderma spirata Meyer, from the Eocene of Jackson, Miss., 

 is a well-characterized Litiopa. It was described in the Ber. Senckenburgische 

 Naturf Ges. fiir 1887, p. 8, pi. i, fig. 7, and I have been able to examine the 

 type-specimen. 



Alaba chipolana n. s. 

 Plate 21, figure 9. 



Older Miocene of the Chipola beds. Northwest Florida, Frank Burns. 



Shell small, smooth, with two very minute nuclear and eight or nine sub- 

 sequent well-rounded whorls ; sculpture only of faint incremental lines, 

 obscure malleations and faint varices ; the varices are irregular in number, 

 sometimes as many as three on one whorl, but they are little elevated ; the 

 penultimate varix is usually more pronounced in the adult than any of the 

 others ; aperture sub-ovate, outer lip slightly thickened inside, simple ; basal 

 part rounded, with a faint sinus at the end of the pillar; body without per- 



