Мовросн AND FiNLAY.—Land Mollusca in Recent Sea-beach Deposit. 133 
List or RECENT MARINE SPECIES ASSOCIATED WITH THE LAND MOLLUSCA. 
Argobuccinum tumidum (Dkr.) | Notoaemaea pileopsis (Q. & G.) 
Amphidesma subtriangulata Wood Odostomia vestalis Murdoch 
Cardita calyculata (L.) Ostrea tatei Sut. 
Chione stuchburyi Gray Patelloida stella var. corticata (Hutt.) 
Chlamys dichrous (Sut.) Plaxiphora coelata Reeve 
Gadinea conica Angas Protothaca crassicosta (Desh.) 
Gibbula nitida Ad. & Ang. Risellopsis varia Hutt. 
Haliotis iris Mart. Risellopsis varia var. carinata Kest. 
Lasaea neozelanica Sut. Sigapatella novaezelandiae (Less.) 
Mactra discors Gra Spisula aequilateralis (Desh.) 
Melarhaphe unifasciata Gray Trichotropis inornata (Hutt.) 
Melarhaphe cincta Q. & G. Trophon patens (H. & J.) 
Modiolus neozelanicus Tredale Trophon squamatus (Hutt.) 
Monodonta aethiops Gmelin Turbo smaragdus (Mart.) 
Mytilus canaliculus Mart. Turritella rosea Q. ie 
Mytilus edulis L. Umbonium anguliferum (Phil.) 
Mytilus maorianus Iredale Venerupis siliqua Desh. 
Neothais lacunosa (Brug.) Verticipronus mytilus Hedley. 
Notoaemaea parviconoidea (Sut.) Xymene plebejus (Hutt.) 
Ptychodon suteri n. sp. (Plate 17, figs. 2, a, b, c.) 
Height, 1-25 mm. ; width, 2:50 mm. —  — : | 
Type, and many paratypes, in Mr. Finlay’s collection. Co-types pre- 
sented to the Wanganui Museum and to the Otago University Museum. 
There are numerous examples of the species. Usually the position and 
number of lamellae in the aperture of other of our species are constant 
characters; in this the colour-pattern, together with the number of riblets 
and the proportional width of the umbilicus, will prove the best guide. 
