Since the description of Nerita olivaria by Le Guillou (1841: 344) hardly anything has been published about its identity and distribution. In the well-known monographs of Reeve (1855), Sowerby (1883), and Tyron (1888) the species is not mentioned, while Von Martens (1889) has only guessed as to its identity. During a short stay at the Museum d’Histoire Naturelle in Geneva¹ in 1968, one of the syntypes of N. olivaria was discovered to be present in the collection of Recluz. This specimen shows that N. olivaria is a senior synonym of Nerita junghuhni Schepman, 1901. As N. junghuhni is also a little known species, we think it useful to give more information.