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TERTIARY FAUNA OF FLORIDA 



dorsally. Arranged according to their dental formulae * some of the species 

 of Scintilla fall into the following groups, but so amorphous are the feebly 

 developed teeth that I feel some suspicion that these differences may prove 

 somewhat inconstant even within the species. 



irrTi' "^ PbMippineiuu Desh., 6". ainbigua Desh., S. Forbesii Desh., 5 1 . 

 timorcnsis Desh., S. semiclaitsa Sby., 5". Hanleyi Desh., S. Deshayesii Sby., 

 ?S. crenulata Cpr. ; ^ ir ' 5\ faba Desh.; m 5". Strangei Desh.; ii-'-ll 



R. 2 r i R. 2 r i * R. i r 2 



6". vitrea Quoy and Gaimard, 5. aurantiaca Desh., 5". Candida Desh., and 6". 

 pcllucida Desh.; ^_ r ^ r S. rosca Desh.; ^^ S. crispata Jeffreys; ^-L? 



R. iii R. on * R. 2 r 2 



6". aurantia Lam., S. maitritiana Sby. ; t_L! ? 5". angusta Desh.,f 6". Cumingi 

 Desh. (= Solecardia). 



Subgenus Spaniorinns Dall. 



Shell with an oblique internal resilium in front of which, in each valve, is 

 a prominent tooth, that in the right valve stronger, conical, and sometimes 

 with traces of a minute obsolete lamella behind it, while in front and above the 

 dorsal margin of the valve is produced laterally, forming a small rounded 

 projection which fits under the dorsal margin of the opposite valve; left valve 

 with the tooth horizontally flattened and triangular ; the hinge-plate is flattened, 

 rounded, or slightly excavated, but behind the resilium carries no distinct 



* In the formula L stands for left and R for right valve, i or 2 for lamellae, and r 

 for resilium. The formula reads from behind forward. 



t As Galeomma, 1855. In this connection some confusion of names may be referred 

 to. The names atnbigua, anomala, and angusta have been used by Deshayes more than 

 once for species of Scintilla. In 1855 (P. Z. S., p. 170) he described a Galeomma 

 angusta which has since been referred to Scintilla. In 1858 he described a Sportella 

 angusta (Bas. Paris, p. 598) which is now referred by M. Cossmann to Scintilla. In 

 1855 Deshayes described as Galeomma ambigua another species of Scintilla, and also 

 a Scintilla anomala. In 1858 he used the name ambigua for a Parisian fossil, which in 

 the explanation of the plates in the Atlas is called S. anomala. Reeve's Scintilla ambigua 

 is intended for Deshayes's Galeomma ambigua and, as this antedates the Parisian fossil, 

 it is the latter which should have a new name. M. Cossmann has proposed for the 

 former the name of S. Reevei, which, unfortunately, cannot stand for the above reasons. 

 The name anomala, being earlier in use, is unavailable, but I prefer to leave it to the 

 French naturalists to rename their fossil. S. V. Wood in the Crag Moll, (ii., p. 120) 

 identified with Erycina ambigua Nyst a Crag shell which turns out to be a Scintilla 

 according to M. Cossmann, who has named it Scintilla Woodi (Cat. Illustr., App., ii., 

 p. 9, 1896). It has the hinge of Spaniorinus. S. eburnca Morch, 1874, not Conrad, 1849, 

 from the Antilles, has been named S. Morchii in my recent synopsis. 



