Lovel Reeve, bearing the title of "The Conchologist's Nomen- 

 clator : a catalogue of the recent species of shells included under 

 the sub-kingdom Mollusca, with their authorities, synonyais, and 

 references to works." 



It was again recorded by Mons. Deshayes, in his Catalogue of 

 the Conchifera or Bivalves in the British Museum, Part I., p. 69, 

 No. 45, as Dione La-niarckii, Gray, 1853, but still not figured. 



Sowerby seems first to have figured it, but not as a species ; he 

 figured it as a variety of Cytherea Kingii, Gray, on pi. 133, 

 fig. 129, Vol. II., p. 638, 1855, from St Thomas', West Indies, 

 and the var. from Nicobar Island. 



Reeve does not record C. Lanarckii, Gray, in his Monograph 

 of the genus Diom; in Vol. xiv., or anywhere else as far as I can 

 ascertain. 



Romer, in his Monographic der Mollusken-Gatlung, Venus, 

 Band I, sub-genus Oytherea, dated 1869, describes this speci(?s as 

 Caryatis Laviarckii, Gray, on page 97, figured in plate 25, tig. 2 

 (not I., as given in reference on page 97), and on the opposite 

 page Caryatis Kingii, Gray, is given. I draw attention par- 

 ticularly to his description of the lunula and umbones in these 

 two species. In Lamarckii he says : "Lunula lanceolata, obso- 

 letissime circumscripta, superficialis, medio cariiiulata, purpurea 

 fusca"; whereas in Kingii he says: "Lunula lanceolata, cordata 

 plana, medio carinulata, albida, plerumque rufo-castanea, obsole- 

 tissime circumscripta." In Kingii he says : " umbones elati sub- 

 oblique recurvati, apioibus acutis, paiiie continibus, in trientem 

 anteriorem collocati"; ■whevea.s in Lamarckii he s,a,y&: "umbones 

 tumidi elati sub-oblique, apibus acutus, revoluti in -J- longitudinis 

 siti." Gray merely says of Kingii that the umbones are white, 

 and such is the case in all the specimens I have of this Bass 

 Straits shell. To my mind these facts and others, as seen by the 

 two descriptions compared side by side, justify the separation of 

 the two species, and I claim the name of our illustrious Hydro- 

 grapher, ('aptain Philip P. King (Kingii) to be given to our 

 Bass Straits species, and tlie name Lamarckii should be retained 

 to designate the Tahitian species if Philippi's habitat is correct. 



The Cytherea modesta of Philippi, in Abbildungen Conchylien, 

 dated 1847, p. 20, Cytherea, pi. 2, fig. 3 (not p. 3, Jig. 3, as given 

 by mistake), and which Sowerby, on p. 639, gives as equal to C. 

 Kingii of Gray, as figured by him of that species, does not repre- 

 sent our Bass Straits species, but it does well represent the St. 

 Thomas species ; therefore I consider Modesta a variety of Gray's 

 Lamarckii and not of Gray's Kingii. 



Deshayes, in dealing with C. modesta of Pliilippi, gives it the 

 name Dione Philippi in British Museum Catalogue Conch., Part 

 I., p. 72, 1833, and makes Modesta of Philippi, but not of Sowerby, 



