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1O43 



TERTIARY FAUNA OF FLORIDA 



basal angle as a rounded winglike extension of the shell ; posterior end strongly 

 folded, middle of the disk nearly smooth except for fine radial strias and 

 incremental lines, which towards the ends of the shell are reinforced by 

 elevated concentric lamellation, especially strong on the wing; beaks rather 

 low ; interior with large adductor scars, the pallial sinus low, not reaching 

 the anterior scar, but more than half confluent below ; lunule and escutcheon 

 narrow, deeply impressed. Lon. 71, alt. 60, diam. 22 mm. 



This species is readily recognized by its dorsal posterior " wing," which 

 none of the other species exhibits, and which is discernible in a young specimen 

 less than fifteen millimetres long. It seems to be characteristic of the Upper 

 as M. biplicata is of the Lower Miocene of the Atlantic coast. 



Metis intastriata Say. 



Tcllina intastriata Say, Journ. Acad. Nat. Sci. Phila., v., p. 218, 1827; De Kay, Zool. 



N. York, p. 211, 1843; Binney's Say, p. 125, 1858. 

 Tcllina Griincri Philippi, Zeitschr. fur Mai., ii., p. 150, 1845. 

 Tcllina inornata Adams, fide Krebs, Cat., p. 101, 1864. 

 Lutricola interstriata Dall, Bull. U. S. Nat. Mus., No. 37, p. 62, 1889. 

 Tcllina cphippium Gregory, Quart. Journ. Geol. Soc. Lond., Fifth Ser., vol. li., p. 293, 



1895; not of Spengler, 1793. 

 Tcllina sagra Orbigny, Paleontologia Cubana, pi. iv., figs. 8, 9 (1853 ?) ; not of Guppy, 



1876. 



Pleistocene of the Antillean region ; recent, from the Florida Keys and 

 Bermuda west to Texas and south to Guadelupe in thirty fathoms or less. 



This species was confounded by Holmes with Macoma constricta, by 

 Gregory with an Oriental species, and by Guppy with the Oligocene type. 

 Say's original name is probably a misprint for interstriata, as observed by 

 Krebs and others. On the plates of the unpublished Cuban Paleontology of 

 Sagra's " Natural History of Cuba," d'Orbigny has named an internal cast, 

 probably of this species, Tellina sagra:. I know several sets of these plates are 

 in circulation, and the names have been cited in the literature, but as far as I 

 can discover no text or Atlas were ever published and the date is very uncertain, 

 though probably about 1853. 



The species can be recognized by its very sharp and narrow posterior fold, 

 its obsolete lunule and escutcheon, its extremely strong flexure, its small 

 adductor scars, and its exceptionally large and high pallial sinus more than 

 half confluent below. Lon. 50, alt. 41, diam. 21.5 mm. 



