390 GASTEROPODA OF THE INFERIOR OOLITE. 



Section 6. — Granulate. 



Shells trochiform, mostly inclined to be depressed, generally rather small, 

 more or less umbilicate. Whorls sloping, flat or sub-angular ; body- whorl relatively 

 large, and usually with a very convex base. Ornaments for the most part deeply 

 incised, so that cross-hatching produces a granular appearance. Sinus-band 

 anterior, narrow and prominent, frequently constituting a keel. 



Pleurotomaria Yeovilensis, Tawney. 



— — var. rugosior. 



— granulata, Sowerby. 



— phylax, sp. nov. 



■ — plicopunctata, Deslongchamps. 



— Palsemon, d'Orbigny. 



— trapeza, sp. nov. 



In the above, PI. granulata, plicopunctata, and Palemon constitute the 

 granulata-group proper, which, be it remembered, was united with the mutabilis- 

 group by Deslongchamps to form one section. Hence, according to the classifica- 

 tion of that author, the Conicas and the Granulatas, as defined above, should for 

 the most part be united. This constitutes the principal difference between the 

 arrangement now adopted and the divisions in the ' Memoire sur les Pleuroto- 

 maires.' 



333. Pleurotomakia punctata, Sowerby, 1818. Plate XXXIII, figs. 1 and 2. 



1818. Tbochus punctatus, Sowerby. Min. Conch., pi. cxciii, figs. 1 and 4. 



1850. Pleurotomakia punctata, Soiv. D'Orbigny, Prod, i, p. 267. 



1854. — — (V Orbigny . Terr. Jur., vol. ii, p. 513, pi. cccxcix, 



figs. 11—13. 

 1854. — Soiv. Morris, Cat., p. 271. 



1873. — — Tawney, Dundry Gasteropoda, p. 38 (30). 



Non — — — Goldfuss, Petref. Germ., pi. clxxxvi, 



fig. 6. 



Bibliography, Sfc. — Sowerby's figure, from a Dundry specimen, is somewhat 

 indifferent, but there is no doubt as to the identification, this being one of the three 

 species of Inferior Oolite Pleurotomarise, where the figured specimen is preserved 

 in the " Sowerby Type Collection " at the British Museum. D'Orbigny's 



