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TERTIARY FAUNA OF FLORIDA ^^ 



determined in a satisfactory manner. It is noted here in order that the genus 

 may be detected if present in these beds. 



All the species of Kellia reported in the literature from the Tertiary of the 

 eastern United States belong to other genera, chiefly Bornia and Aligeiia, under 

 which they will be found referred to. Kellia Laperousii Deshayes is not un- 

 common in the Pleistocene of the Pacific coast, but does not seem to have been 

 reported from the older formations. It is extremely variable in form. Bornia 

 luticola Val. (Voy. Venus, pi. 24, figs, ja-b, 1846) is identical with it, but 

 Ungulina luticola Val. {op. cit., pi. 24, fig. 5) is a worn specimen of Petricola 

 carditoides Conrad. 



Kellia suborbicularis Montagu. 

 Mya siiborhicularis Montagu, Test. Brit., pp. 39. 564, pi. 26, fig. 6, 1804. 

 Kellia suborbicularis Turton, Dithyra Brit., p. 57, pi. 11, figs. 5, 6, 1822. 

 fLepton fabagella Conrad, Am. Mar. Conch., ii., p. 53, pi. 11, fig. 3, 183 1 ; Tryon, Mar. 



Conch., p. 173, pi. a, figs. 442-44, 1873. 

 fKellia fabagella Conrad, Proc. Acad. Nat. Sci. Phila., i., p. 310, 1843. 

 fMontacuta Gouldii Thomson, Am. Journ. Conch., iii., p. 33, pi. i, fig. 15, 1867; Tryon, 



Mar. Conch., p. 172, pi. t,^. fig. 441, 1873. 



Pleistocene of California, at San Diego and San Pedro Hill ; Hemphill. 

 Recent on the European shores south to Madeira, on the coast of southern 

 New England, and in California. 



An examination of Thomson's types in the Academy of Natural Sciences 

 shows that they belong to the genus Kellia and are identical with the shell 

 identified by Verrill and others with Kellia suborbicularis from New Eng- 

 land. The Lepton fabagella of Conrad, afterwards referred by him to Kellia, 

 is probably the same species, having been obtained in Narragansett Bay only 

 a short distance from Thomson's locality, while the figures are very similar. 

 Conrad's type is lost, and absolute certainty about the species is, therefore, 

 unattainable. I have not thought it worth while to give the long list of Euro- 

 pean synonyms. It is noticeable that the specimens so far obtained on the 

 New England coast, while externally very similar to the European shell, are 

 more delicate and decidedly smaller than the average of the latter. No speci- 

 mens like the average adult British suborbicularis have ever been obtained 

 on the New England coast. The hinge armature is more slender, the resilium 

 weaker but proportionately longer and decidedly more calcareous than in the 

 British shell. It is probably most prudent therefore for the present to treat 

 the New England shell as a varietv, for which Thomson's name mav be re- 



