PLEUROTOMARIA. 439 



in a general sort of way with PL Anglica, Sow. I quote the following- : — " Owing 

 to the imperfect condition of the shell, an absolutely correct identification of 

 the Dogger fossil with this or that member of the Anglica-gvou^ is almost 

 impossible. It comes very near to PL araneosa, Desl." (' Geol. Mag.,' dec. 3, 

 vol. ii, p. 154, pi. iv, fig. 5). This is about as near as we can get pending the 

 discovery of better specimens. 



N.B. — Whatever may have been the original or originals of PL Anglica, 

 Sowerby, that species seems now to be restricted to certain wide-angled tabulate 

 forms which occur in the Lower Lias. 



380. Pleurotomaria Yeovilensis, Tawney, 1873. Plate XXXIX, figs. 8a,b,c; 



and var. rugosior, figs. 9 a, b. 



1873. Pleurotomaria Yeovilensis, Tawney. Dundry Gasteropoda, p. 52 (44), 



pi. iii, fig. 4. 



Bibliography, SfC — PL Yeovilensis was described by Tawney at a time when 

 good specimens were rare. The locality " Yeovil" was given because so many of 

 the Bradford Abbas fossils in those days were supplied to collections and museums 

 by " fossil-men " who resided at Yeovil, the nearest town to Bradford Abbas. 



The species is one of remarkable beauty, and interesting as the representative 

 of the Granulatae in the Lower Division of the Inferior Oolite. PL Alcibiades is 

 possibly a more depressed and less ornamented form ; this, too, in France most 

 likely occurs on a low horizon, not being noted from the " Oolithe ferrugineuse." 



Description : 



Height . . . . .17 mm. 



Basal diameter . . . .30 mm. 



Spiral angle ..... 105°. 



Shell conical-depressed, deeply umbilicate. Spire regular and sharp, with a 

 slightly flattened apex. Whorls (seven) subangular and sloping; suture sub- 

 canaliculate. The whorls exhibit fine reticulate ornaments, having the tendency 

 to become granulate ; whilst in the two last whorls an elegant tuberculate corona 

 is developed on the posterior ridge, the tubercles radiating away from the centre. 



The sinus-band is very salient, being situated at the anterior angle in the 

 whorls of the spire ; it has granulated spiral lines to the number of three. The 

 body-whorl is relatively very large, and, in addition to the posterior corona and 

 the prominence of the sinus-band, exhibits a thick tuberculated belt at the 

 periphery ; these tuberculations are drawn out radially, and correspond to the 

 tuberculations of the corona. The base is subconvex, being excavated by a deep 



57 * 



