132 SYSTEMATIC PALEONTOLOGY 



AcT^ox pusTLLUs (Forbes). 

 Plate XXXIX, Fig. 3. 



Tornatella pusilla Forbes, 1843, Rep. Brit. Assoc. Adv. Sci., p. 191. 



Description. — ''Shell ovate-globose, whitish; whorls 4, regularly and 

 deeply punctate-striate ; aperture oblong. Length 4, breadth 2 mm." 

 Forbes, 1843. 



This species does not seem to have ever been figured, and until authen- 

 tic specimens have been seen the identification cannot be certain. The 

 essential characters of the Maryland specimens are a short ovate-globose 

 shell with a much depressed spire and with uniform, distant, regularly 

 spaced revolving lines with faint punctae. 



Length, 4.5 mm. ; diameter^ 3 mm. 



Occurrence. — St. Mary's Formation. St. Mary's Eiver. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 U. S. Xational Museum. 



Action shilohensis \\Tiitfield. 

 Plate XXXIX, Fig. 4. 



ActcEon punctostriatus Dall, 1890, Trans. Wagner Free lust. Sci., vol. iii, pt. i, p. H. 



(In part.) 

 Actceon Shilohensis Whitfield, 1894, Mou. xxiv, U. S. Geol. Survey, p. 137, pi. x.xiv, 

 figs. 1.5-17. 



Description. — " Shell of about medium size, subglobular or broadly 

 ovate, the transverse diameter being to the height about as three to five ; 

 spire short, the apical angle about 70 degrees. Volutions six, short in 

 the spire, abruptly rounded on the top, giving an almost impressed suture 

 line, and presenting a step-like appearance to the spire, rounded and full 

 below; aperture moderately large, somewhat effuse below, the outer lip 

 sharp; columella short and the fold very distinct and defined. Surface 

 polished, with nearly equidistant impressed lines, except on the upper 

 third of the height or on the exposed portion in the spire, where they are 

 obsolete ; lines generally clean, or free from punctae or dots. Some of the 

 interspaces on the lower part of the volution marked by an intermediate 

 finer line. 



" This species differs from several forms known in the Eocene forma- 



