. Bulletin of the British Museum (Natural History), Geology. 74 MORRIS, DICKINS AND ASTAFIEVA-URBAITIS. Fig. 20 Wilkingia regularis (King, in de Verneuil). Lower Carboniferous, Visean; Sloboda, Gouv. de Toula, Russia. Figs 20a-d, EMP 1743 (1 of 4), de Verneuil Collection, lectotype (selected herein), a silicified steinkern; Fig. 20a, right side; Fig. 20b, left side; Fig. 20c, anterior; Fig. 20d, dorsum. Figs 20e-f, EMP 1744, paralectotypes, views of right sides. Figs 20g-i, BM L18, ? ex de Verneuil Collection, ?paralectotype; Fig. 20g, left side; Fig. 20h, dorsum; Fig. 20i, latex cast of hinge
. Bulletin of the British Museum (Natural History), Geology. 74 MORRIS, DICKINS AND ASTAFIEVA-URBAITIS. Fig. 20 Wilkingia regularis (King, in de Verneuil). Lower Carboniferous, Visean; Sloboda, Gouv. de Toula, Russia. Figs 20a-d, EMP 1743 (1 of 4), de Verneuil Collection, lectotype (selected herein), a silicified steinkern; Fig. 20a, right side; Fig. 20b, left side; Fig. 20c, anterior; Fig. 20d, dorsum. Figs 20e-f, EMP 1744, paralectotypes, views of right sides. Figs 20g-i, BM L18, ? ex de Verneuil Collection, ?paralectotype; Fig. 20g, left side; Fig. 20h, dorsum; Fig. 20i, latex cast of hinge area seen from the inside to show inner surface of nymphs. All x0-88, except Fig. 20i, xl-5. Allorisma King. Finally, two specimens (BM L18) in the BM (NH) that have the collectors' number 50, in similar hand- writing to one of the Valdai specimens, may also be original syntypes that now become paralectotypes. Synonyms. Although under normal circumstances we consider it inadvisable to designate types for junior synonyms or other invalid names, we feel that it is necessary to do this in the present case in order to preserve the stability of the generic name Wilkingia. 1. Venus elliptica Phillips, 1836 (non Lamarck, 1818). Neotype, here designated, is BM L47526, the specimen figured by Hind (1900: pi. 48, fig. 4). Wilson (1959: 402) designated the figure in Phillips (1836: pi. 2, fig. 7) as the lectotype of this species. In the same publication, however, he stated that the original specimen could not be found in the collections of the Yorkshire Philosophical Society (at the Yorkshire Museum, York) where it might be expected to be stored, nor in the Hancock Museum, Newcastle-upon- Tyne, nor in the University College Galway, Ireland. We have also been unsuccessful in finding the specimen in the Gilbertson Collection in the BM(NH) (it is not listed in Gilbertson's manuscript catalogue). We have also searched in vain in Leeds City Museum and in the Phillips Collection at Oxford Univ
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