530 Verrill and Bush — Marine Mollusca of the Bermudas. 



having spiral sculpture. In a restricted sense it includes only those 

 having spiral sculpture similar in character to that of rufa of 

 Philippi. 



Pyrgostelis puncta (C. B. Adams). 



Plate LXIV. Figs. 19 and 19o. 



Chemnitzia puncta C. B. Adams, Cont. to Conch., No. 5, p. 72, 1850. Morch, 



Syn. Moll. Mar., p. 162, 1875. 

 Turbonilla puncta Tryon, Manual Conch., viii, p. 331 (not pi. 76, fig. 22)^ 



1886. (?)Dall, Bull. U. S. Nat. Mus., No. 37, p. 128, 1889. Bush, Proc. 



Acad. Nat, Sci., Philadelphia, pp. 162, 174, 1899. 



Common in the shell-sand, 



Pyrgostelis fasciata (d'Orb.) ? 



Turbonilla fasciata Bush, Proc. Acad. Nat. Sci., Philadelphia, pp. 155, 175^ 

 1899 ; (not Chemnitzia fasciata Eeq. , 1848 = Pyrgostelis fulvocincta Thomp- 

 son, nor Turbonilla fasciata Forbes, 184iS= Eulimella). 



Found in the shell-sand. 



Subgenus Mumiola A. Adams, 1864. Type, M. spirata A. Adams. 



Mumiola A. Adams, Joum. Linnaean Soc, vii, p. 5, 1864. Tryon, 1886, in 

 part (not Mumiola Monterosato, 1884).* 



"Test thin, elongate or ovate; whorls convex, cancellated or 

 granulose. Aperture ovate ; margin of the lip regularly arched." 

 " An ovate, cancellate group which is named Jfiwiiola.''^ 

 First species — 3Ionoptygma spirata A. Adams, 1851 (not Chem- 

 nitzia spirata Kurtz and Stimpson, \%5\=. Ondina, nor Parthenia 

 spirata A. Adams, 1860= Pi/rgostelis) — taken for type. 



" Surface regularly and beautifully decussated with raised lines." 

 Shell light brown or yellowish with ribs extending over the base,, 

 with the interstices crossed by raised spirals. 



Pyrgostelis (Mumiola) asperula Bush. 



Plate LXV. Fig. 23. 



Turbonilla asperula Bush, Proc. Acad. Nat. Sci., Philadelphia, pp. 151, 176, 

 1899. 



Not uncommon in the shell-sand. 



* Jfumio?a Monterosato, 1884= Orfosfo»Me?/a Bucq., Dautz. Dollf., 1883. Type 

 0. doliolum Phil. Figured in Report of Expeditions by Prince Monaco. 



