248 TRANSACTIONS OF THE WAGNER FREE 



In the upper Pliocene of the Myakka River, Florida, Willcox ; Post- 

 Pliocene of South Carolina, Holmes ; and of Florida at North Creek, Dall ; 

 living on the southeastern coast of the United States between high-water 

 mark and two fathoms, on grassy or muddy flats, from Cape Hatteras south 

 to Florida and in the Antilles as far as St. Thomas. 



This species was first observed by Conrad at Tampa Bay, but in the ac- 

 count of his explorations there it is named but not described. It has been 

 found as far west as Galveston, Texas. As previously noted, it is hardly more 

 than a variety of the preceding. 



De Gregorio in his monograph of the Claiborne fauna describes a speci- 

 men and gives a tolerable figure, but states that its provenance was unknown. 

 It is obviously the present species. 



Genus OSCILLA A. Adams. 



Oscilla biseriata (Gabb sp.) Dall. 



Triptychus niveus Morch, Malak. Blatt. xxii. p. 159, 1875. 



Cerithium biseriatum Gabb, Journ. Acad. Nat. Sci. Phila., 2d ser. viii p. 361, pi. 46, figs. 



50, 50 a, 1874. 

 Pyramidella? vhicta Dall, Proc. U. S. Nat. Mus. vi. p. 330, pi. x., fig. 7, 1885. 

 Oscilla nivea Dall, Rep. Blake Gastr., p. 339, 1889 ; Bull U. S. Nat. Mus. No. 37, p. 130, No. 



625, pi. 48, fig. 2, 1889. 



Found in the Pliocene clays of Costa Rica (Gabb) and in the Caloosa- 

 hatchie beds (Dall) ; living in the Antillean region from South Florida to 

 Martinique (Hemphill and Morch). 



This remarkable little shell has not been reported from the Pliocene de- 

 posits north of Florida, a fact which is quite as likely to be due to its small 

 size and inconspicuous character as to a southerly limited distribution. 



Genus ODONTOSTOMIA Jeffreys. 



Odostomia Fleming, 1818, not Fleming, 1813. 



Odontostomia]e(i'ceys, Mai. Conch. Mag. ii. p. 30, 1839. 



Not Odontostomia Agassiz, Nom. Scudder, 1882, as of Orbigny. 



This genus has been in a good deal of confusion, and I have not seen 

 anywhere a reference to the first use of the name, Odostomia, by which it is 

 most commonly known. 



Sir David Brewster edited a publication called the Edinburgh Ency- 

 clopedia, of which volume vii., part one, was published in 1813, and con- 

 tained an article with the caption " Conchology," by Rev. Dr. John Fleming 

 (pp. 55-82). This very excellent naturalist afterward prepared similar articles 

 for the Encyclopedia Britannica, fourth, fifth and sixth editions, the last 

 of which, somewhat revised, was reprinted in 1837 as a separate volume. The 

 Edinburgh Encyclopedia was completed up to volume xii. in 1817, and ap- 

 pears to have been in octavo ; a subsequent edition in quarto was completed 

 in 1830. I have not been able to consult the original edition, but have care- 



