92 THE VOYAGE OF H.M.S. CHALLENGER. 



The elevated lamellse extend about half way across the valves, and are well developed, 

 whilst in ordinary examples they do not pass beyond the hinder umbonal ridge. The 

 teeth, pallial sinus, and musciilar imju-essions are similar, and the painting, which is"of m 

 bright pink-scarlet colour, has a like disposition. 



Psammohia oriens I consider the adult form of this species, and at this age (being 

 much thicker) the external campdike markings are concealed within Ijy a shelly deposit. 



The specimen figured by Chemnitz is a young shell, and said to have come from the 

 coast of Guinea. Should this be true, my association of Psammohia oriens with this 

 species would probably be incorrect. However, I believe this identification to be accurate, 

 for the shell figured by Reeve from the Philippine Islands and another in the British 

 Museum from Hainan correspond very closely with the description and figure of Chemnitz. 

 Psammohia oriens was described from Japanese specimens, and in the Cumingian collec- 

 tion there are others from Torres Strait. 



Psammohia sp. 



Hahitat. — Off Amboina, in 15 to 20 fathoms. 



A single, apparently young, valve is all that was dredged. It very closely resembles 

 Psammohia weinkauffi, Crosse, from the Algerian coast, judging from the description and 

 figure in the Journal de Conchyliologie, 1864, vol. xii. p. 17, pi. ii. fig. 4, and, had I not 

 known that it came from so distant a locality as Amboina, 1 should not have hesitated 

 to have identified it with that species. The oldique strife may possibly prove on 

 comparison a trifle coarser, and probably other characters will be observable which ' will 

 separate the two forms. 



Psammohia lineolata, Gray. 



Psammohia lineolata, Gray, Dieflfenbach's New Zealand, vol. ii. p. 2b'i. 



Psammohia lineolata, Hanley, Cat. Biv. Shells, p. 59, Appendix, p. 346, pi. xiv. fig. 1. 



Psammohia lineolata, Eeeve, Conch. Icon., vol. x. fig. 58. 



Psammohia lineolata, Hutton, Manual N. Zeal. Moll., p. 142. 



Psammohia lineolata, Smith, Voy. "Erebus" and "Terror," pi. ii. fig. 11. 



Psammohia convexa, Eeeve, Conch. Icon., vol. x. fig. 59, a, h. 



Hahitat. — Station 167a, Queen Charlotte Sound, near Long Island, New Zealand, in 

 10 fathoms ; mud. 



This species, according to Hutton, is common, and ranges from Auckland to Dunedin 

 and the Chatham Islands. It is elongate, suboval, rather narrower anteriorly than 

 behind, almost equilateral, glossy, sculptured with fine concentric lines of growth, pinkish, 

 sometimes reddish-pink, varied with paler and darker concentric zones, and very minute 

 anastomosing subradiate, more or less pellucid, lines. At times specimens are met with 



