NOTES AND CORRECTIONS. 123 
the species of Deslongchamps is thus removed. The specimen figured Tab. XLI, fig. 13, exhibits the first 
spine, which is monodactyle; a second and much larger spine, also monodactyle; the third and ultimate 
spine being didactyle. 
Acteonina ?, Part I, Tab. VIII, fig. 12*, is the young shell of 4. oliveformis, p. 103. 
Lima Luciencis, D’Orb., ‘Gr. Ool. Mon.,’ Part II, p. 28, Tab. III, fig. 4. This shell is a synonym of 
Lima rudis, Sow. The number of costz vary from eight to eleven; the specimen figured in the ‘ Mineral 
Conchology,’ tab. 214, has only seven cost, and the figure is unusually gibbose. Its geological range is 
considerable ; it occurs sparingly in the Great Oolite of the Minchinhampton district and in the Cornbrash 
of the coast of Yorkshire, but in the Coral Rag of Malton it is moderately abundant. 
Sub-genus Crossostoma, Part I, p. 72. Of the three Oolitic species assigned to this proposed sub-genus 
of Delphinula, the only one which exhibits the distinctive characters is C. Pratii; the other two forms, 
discoideum and heliciforme, were formerly supposed to represent in their apertures the immature condition 
of that sub-genus. Subsequent observations of numerous specimens has compelled me to abandon that view, 
and to regard discoideum and heliciforme as adult shells, or discoidal forms of smooth Monodonta. Other 
examples of Monodonta allied to the Great Oolite forms, but less depressed, have been figured by Messrs. 
Hebert and Deslongchamps, in their ‘Memoir on the Kelloway Rock Fossils of Montreuil-Bellay,’ under 
the names of Monodonta ovulata and papillata. 
Cerithium quadricinctum, Goldf., and C. lineforme, Roem. These two forms must be united into one 
species ; individuals with large nodules and with only three distinct rows have been assigned to C. lime- 
forme, but, even with these, indications of a fourth row are occasionally to be discovered, and the promi- 
nence of the nodules, and their number in each yolution, are very variable. C. quadricinetum has a 
considerable geological range, and it occurs also in the Coral Rag of Germany. 
Patella suprajurensis, Part I, p. 92, Tab. XII, figs. 9, 9a. I can now only regard this form as a variety 
of P. Aubentonensis, in which the lamelle of growth are strongly marked and the cancellated lines have 
disappeared. It is also not uncommon to meet with smooth examples of the latter species. 
Pholadomya solitaria, Part II, p. 124, Tab. XI, fig. 1, et Tab. XII, fig. 2; erroneously printed P. odlita 
upon the reference facing the latter table. Pholadomya oblita is Tab. XII, fig. 5, p. 142*. The variations 
of figure and of ornamentation, either separately or combined, are so considerable in the cordiform examples 
of Pholadomya, that a large number are indispensable to enable us to legislate upon them with any 
confidence; probably P. solitaria is only a variety of P. deltoidea, Sow. 
