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



Family Osteeid.e. 



Ostrea, Linne. 

 Ostrea imbricata, Lamarck. 



Ostrea imbricata, (Lamarck) Sowerby, Conch. Icon., vol. xviii. pi. xvii. figs. 3G, a, h. 

 Habitat- — Station 188, south of New Guinea, in 28 fathoms ; green mud. 



A single small specimen obtained at the above locality agrees with this species as 

 determined by Sowerby, examples of which from China and Japan may be seen in the 

 British Museum. 



Besides this shell, another of immature growth, and belonging to a distinct species, 

 was dredged at Station 162, ofi" East Moneoeur Island, Bass Strait, in 38 fathoms; and 

 four young odd valves, respectively from Fayal, Bermuda, the Philippines, and Tongatabu, 

 none of which are safely identifiable, were also secured. 



Family A N o M 1 1 D ^. 



Anotnia, Linne. 

 Anomia ephippium, Linne, var. 



Anomia epliippium, Linne, Syst. Nat., ed. 12, p. 1150. 



Anomia ephippiuni, Forbes and Hanley, Brit. Moll., vol. ii. p. 325, pi. Iv. figs. 2, 3, 5, 7, and 



PI. T. fig. 2. 

 Anomia epMppium., Jeffreys, Brit. Concli., vol. ii. p. 30, pi. i. fig. 4, vol. v. p. 165, pi. xx. fig. 1. 

 Anomia epMppium, Jeffreys, Proc. Zool. Soc. Lend., 1879, p. 554. 



Habitat. — Station 122, off Pernambuco, Brazil, in 350 fathoms ; and off Nightingale 

 Island, Tristan da Cunha, in 100 to 150 fathoms. 



A few small valves from these localities apparently belong to this well-known 

 European form. It has not, I believe, been previously obtained so far south. 



Anomia laqueata, Eeeve, var. (?). 



Anomia laqueata, Eeeve, Conch. Icon., vol. xi. pi. iv. figs. 18, a, h. 

 Anomia laqueata, Schrenk, Eeise Amur-Lande, vol. ii. p. 474. 

 Anomia laqueata, Dunker, Index MoU. Japon., p. 248. 



Habitat. — Station 233a, off Kobe, Japan, in 50 fathoms. 



The locality of this species was unknown to Eeeve, and was first assigned to it by 

 Schrenk. The Challenger specimens are smaller than the type, and do not exhibit the 

 radiating ridging depicted in Reeve's figure. They possibly are merely a smooth variety, 

 however, for the species of this genus, as in Ostrea, Spondylus, and some other genera, 

 are excessively variable and very difficult to determine. 



