Figure 99 from: Oliver PG, Morgenroth H, Salvador A (2017) Type specimens of Mollusca described by Col. George Montagu in the Royal Albert Memorial Museum & Art Gallery, Exeter and The Natural History Museum, London. Zoosystematics and Evolution 93(2): 363-412. https://doi.org/10.3897/zse.93.13073

Figure 99 - Bulla umbilicata Montagu, 1803 [Retusa umbilicata (Montagu, 1803)] 99.1/2 Top and bottom of box indicating type status but no original labels 99.3 Apertural view of larger syntype NHMUK1998038/1. 99.4 Abapertural view of smaller syntype NHMUK1998038/2.