484 GASTEROPODA OF THE INFERIOR OOLITE. 



or by Hudleston and Wilson. Quite recently the Brodie Collection of fossils 

 from the Leckhampton Freestones has been acquired for the Jermyn Street 

 Museum. A specimen marked " Turho^ n. sp., 34," answers fairly well to Lycett's 

 description, so far as the whorls of the spire are concerned. This is evidently a 

 Pniyuriua, and has some resemblance to the form on PI. I, fig. 2, of this 

 Monograph. 



438. Bkachytrema Pontonis, sp. nov. Plate XLIII, figs. 21 a, 21 h. 



Bescriijtion : 



Height . . . . .14 mm. 



Spiral angle .... 65°. 



Shell thick, trochiform, imperforate. The spire and body-whorl are nearly 

 equal in height, and the spiral angle perfectly regular. Number of whorls five or 

 six, sutures well-marked ; the spire-whorls carry three sub-nodular spiral bands. 

 The body-whorl is large and bicarinate owing to the prominence of the second 

 and third spirals ; number of spirals in the base about five. 



The aperture is quadrangular with the columella considerably produced and 

 slightly curved, and terminated at the point by a conspicuous reflexed notch 

 or gutter. 



Relations and Distribution. — This curious shell has a strong resemblance to 

 Littorina FMlli^psii, except as regards the aperture. A single specimen from 

 Great Ponton. 



439 ? Brachytrema " pr^tenue." Plate XLIII, figs. 24, 24 6. 



Descri2Jtio7i : 



Height . ' . . . . 3 mm. 



Spiral angle . . • • . 32 . 



Shell minute, conical-elongate, imperforate. There are about six whorls, flat 

 and close, though the sutures are fairly distinct. The ornaments consist of fine 

 spiral lines decussating with nodular longitudinal lines, slightly variciform. The 

 body-whorl is about one-third the total height. Aperture subquadrate with a 

 reflexed notch at the columellar extremity. 



Relations and DistrihUion.— More acute than any other species of Brachytrema, 

 this might almost be regarded as a Cerithium, though the style of ornamentation 

 connects it with Brachytrema. A single specimen from the Oolite Marl, 

 Notgrove. 



