INSTITUTE QF SCIENCE, PHILADELPHIA. 



49 



Mai-ginella (apicina Menke var. ?) pardalis Dall. 

 Plate 5, figure 2. 

 ? Marginella apicina Menke, Syn. Meth. Moll., p. 87, 1828, var. 



Caloosahatchie beds. 



These shells, which may possibly be referred to M. apicina, are uniformly 

 smaller than the Floridian recent M. apicina, and in size and form resemble the 

 more southern, unspotted variety which has been named virginea. They were 

 originally spotted and still sometimes retain traces of the color, as in the one 

 figured. Max. Ion. of shell lo.o; lat. 8.0. mm. 



Marginella floridana n. s. 

 Plate 5, figure 5. 



Rare in the Caloosahatchie beds. 



Shell small, stout, having nearly the form of Pcrsic7ila, but the spire, though 

 blunt, is not involute ; whorls about four, inflated ; sides moderately convex ; 

 aperture narrow, nearly straight; outer lip not very thick, not marginated ex- 

 ternally, internally finely lirate; inner lip with a well-marked callus behind, in 

 front four to six plaits, the anterior plait much the strongest, the others becom- 

 ing fainter in their posterior order ; siphonal fascicle distinct. Max. Ion. of 

 shell 5.0; max. lat. 3.3 mm. 



This stout little shell, like M. semen, bridges the gap between Persiciila and 

 Marginella proper. It retains no color-markings, but its general form recalls 

 that of the recent Floridian Pcrsictila eaten ala, which has very pale markings 

 which would easily be lost in fossilizing. 



Marginella Lavalleana Orbigny. 



? Marginella minula Pfeiffer, Arch. f. Naturg. I. p. 259, 1840. 



Marginella Lavalleana Orbigny, Moll, de Cuba, ii. p. loi, pi. xx. figs. 36-38, 1842. 



Caloosahatchie beds, not common. Recent, on the Florida coast and 

 among the Antilles. 



There are two small species which occupy the same area, which I have 

 elsewhere separated under the above name and that of M. minima Guilding. 

 The present species agrees exactly with the recent shells. 



Marginella limatula Conrad. 

 Marginella limahila Conrad, Journ. Acad. Nat. Sci. Phila. vii. p. 140, 1834. Foss. Med. 



Tert. U. S., p. 86, pi. 49, fig. 9 (error for fig. 11, fide Conr. in lit.), 1845. 

 Porcellana, limatula Tuomey & Holmes, Pleioc. Foss. S. C, p. 130, pi. 27, figs. 10, 11, 1S57. 

 Marginella roscida Redfield, Proc. Acad. Nat. Sci. Phila. xii. p. 174, i860. 

 Prunum limatula (sic) Conrad, Am. Journ. Conch, iv. p. 67, pi. 6, fig. 5, 1868. 



Tampa silex-beds. Miocene of Florida, Virginia and the Carolinas ; Pliocene 

 of Shell Creek, of Caloosahatchie beds and of South Carolina. Recent off the 

 Carolina coast, abundantly, in 25 to lOO fathoms (living) sand and gravel. 



