. Bulletin of the British Museum (Natural History), Geology. 258 CLEEVELY & MORRIS. Fig. 11 Species of Paraghuconia. 1, 3, Paraglauconia carbonaria (F. A. Roemer, 1836). BMNH , ? topotype, limestone slab from Neustadt-am-Rubenberge, nr Hannover, West Germany; Wealden ( = Berriasian); history unrecorded. 1, area at bottom right of block, x 2; 3, area on opposite side of block, top left, x 1-5. 2, Paraglauconia d. tricarinata (J. de C. Sowerby, 1836). BMNH , ex G. Mantell colln (no. 2780), labelled 'Sussex' but probably from north Germany; x 3. 4-8, Paraglauconia tricarinata
. Bulletin of the British Museum (Natural History), Geology. 258 CLEEVELY & MORRIS. Fig. 11 Species of Paraghuconia. 1, 3, Paraglauconia carbonaria (F. A. Roemer, 1836). BMNH , ? topotype, limestone slab from Neustadt-am-Rubenberge, nr Hannover, West Germany; Wealden ( = Berriasian); history unrecorded. 1, area at bottom right of block, x 2; 3, area on opposite side of block, top left, x 1-5. 2, Paraglauconia d. tricarinata (J. de C. Sowerby, 1836). BMNH , ex G. Mantell colln (no. 2780), labelled 'Sussex' but probably from north Germany; x 3. 4-8, Paraglauconia tricarinata (J. de C. Sowerby, 1836). 4, OUM J 37550, Corbula Bed, Durlston Bay, Swanage, Dorset. Specimen described by Arkell (1941: 102) as var. purbeckensis but figured by him as var. durlstonensis (1941: fig. 30); regarded by Mennessier as holotype of purbeckensis. Its ornament of fine spirals and tuberculate cords is only just visible; x 3. 5, BMNH , Corbula Bed, Durlston Bay, Swanage; shows the opisthocyrt growth lines; x 3. 6-8, from Durlston Formn, Pounceford, nr Burwash, East Sussex; all x 2-5. 6, BMNH , lectotype of Melanopsis tricarinata, G. A. Mantell colln. 7, BMNH , history not recorded; it shows the simple ornament of early whorls in addition to the tubercles, fine spirals and growth lines of the tricar- inate later whorls. 8, BMNH , paralectotype, G. A. Mantell colln. Mantell's Wealden specimens states: 'This series of Wealden shells etc. has been collected with considerable labor and expense ... the specimens being in many instances unique'. This does not necessarily imply the material was personally collected by Mantell—but could merely mean that he acquired it. Mantell (1847: pi. 6, fig. 5) figured an example of carbonaria said to have been collected at Compton Bay in the Isle of Wight. Yet this too is very reminiscent of material from Germany now in the BM(NH) collections (Fig. , Fig. ). Priority of carbonaria and tricarinata. As th
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