(50) Nerita marmorata (Hombron and Jacquinot) Hab. Living just above high-water level on the surface of the coral-limestone coast, St. Christoval.
(51) Neritina cornea (Linné) Hab. Star Harbour, St. Christoval, on the trunks of trees 150 feet above the nearest stream; Choiseul Bay, from a stream; Shortland Islands, on the stems of tree-ferns and areca palms in a marshy district. I found this species in many other islands; but did not collect it except in the above three localities.
(52) Neritina subsulcata (Sowerby) Hab. Streams in St. Christoval and in the islands of Bougainville Straits. In the Shortland Islands I found this species on the stems of tree-ferns and areca palms in a marshy district. I only collected it in these localities; but I found it in many other islands. When first picked off the rock, it ejects a watery fluid possessing a powerful musky odour.
(53) Neritina dubia (Chemnitz) Hab. Shortland Islands, in a stream.
(54) Neritina adumbrata (Reeve) Hab. A stream in Choiseul Bay, and the rocky sides of a stream-course in Ugi.
(55) Neritina pulligera (Linné) Hab. Guadalcanar, St. Christoval, Ugi, Choiseul Bay, in the streams.
(56) Neritina petiti (Récluz) Hab. Treasury and Faro Islands, in the streams.
(57) Neritina olivacea (Le Guillou) Hab. Streams in Treasury Island and at Sulagina, St. Christoval.
(58) Neritina macgillivrayi (Reeve) Hab. Streams in Guadalcanar and in Faro Island, Bougainville Straits.
(59) Neritina asperulata (Récluz) Hab. Rocky sides of a stream-course in Ugi.