INSTITUTE OF SCIENCE, PHILADELPHIA. 4I 



Mangilia melanitica Dall, var. oxia Bush. 

 Mangilia melanitica Dall, var. oxia Bush, Trans. Conn. Acad. vi. p. 459, pi. xlv. fig, 3, 1885. 



Caloosahatchie beds. Recent, North Carolina to Florida, in lo to 25 

 fathoms. 



The typical form is more closely sculptured than Miss Bush's variety, and 

 is of a milky white with a black columella. Hers is more sparsely transversely 

 sculptured, has a more smooth and glistening surface, sharper ribs, and is often 

 of a reddish brown all over and not much darker on the pillar. It is rare in 

 the marls. 



Mangilia plicosa C. B. Adams. 



Pieurotoma plicaia C. B. Adams, Bost. Journ. Nat. Hist. iii. p. 318, pi. iii. fig. 6, 1840 ; not 



of Lamarck. 

 Pieurotoma plicosa C. B. Adams, Contr. to Conch., p. 54, 1850. 

 Pieurotoma plicatum Kurtz, Catalogue, p. 9, i860. 



Pieurotoma brunnea Perkins, Proc. Bost. Soc. Nat. His. xiii. p. 121, 1869. 

 Clathurella Jewettii S\.e3irns,¥roc. Acad. Nat. Sci. Phila. for 1873, p. 346; Dall, Hemphill's 



Shells, p. 329, 1883. 



Caloosahatchie beds. Recent, New England to Florida, near low-water 

 mark. 



Prof Adams' name having been, under the systems then prevailing, a 

 synonym, it is proper to accept his substitution of anothei- for it. 



Mangilia stellata Stearns. 



Mangilia stellata Stearns, Proc. Bost. Soc. Nat. Hist. xv. p. 22, 1872; Dall, Hemphill's 



Shells, p. 32S, 1883. 



Caloosahatchie beds. Recent, West Coast of Florida from Cedar Keys to 

 Key West. 



Mangilia rubella Kurtz & Stimpson. 

 Mangilia rubella K. & S., Proc. Bost. Soc. Nat. Hist. iv. p. 115, 1851. 



Caloosahatchie beds. Recent, North Carolina to Florida. 



The recent form is easily recognized by its acute spire and canal, and few 

 angular whitish ribs, with darker interspaces. 



Subgenus Pleurotomella Verrill. 

 Pleurotomella chariessa var. pistillata Dall. 

 Plate 3, figure 3. 

 Clathurella chariessa Watson (pars), Chall. Gastr., p. 352, pi. xx. fig. 6, 1881. 

 Pleurotomella JeffreysiiV einW (pars). Trans. Conn. Acad. vi. p. 411, pi. xliv. fig. 3, 1885. 



Caloosahatchie beds, rare. Recent in 300 to 1600 fathoms in the North 

 Atlantic. 



The sculpture of the single specimen obtained, though not quite mature, 

 is identical with the typical PI. chariessa. But that species has a white pillar 

 in all the .specimens I have seen, while the fossil exhibits beyond question 



