| dc.description |
Several trochiform shells found in the Jurassic rocks, which were formerly referred either to Trochus or to Solarium, have in more recent years been regarded as related to the genus Onustus. I am not aware who was the first author to adopt this view, but we find Hébert and Deslongchamps (1860) recognizing the genus in the Callovian of Montrueil Bellay. Subsequently Lycett (Suppl. to the Great Ool. Moll. p. 103) gave a diagnosis, more especially as applicable to the Jurassic species, and described Onustus Burtonensis from the Forest Marble of Burton Bradstock. |
