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



Famil}' T r i g o N 1 1 d ^. 



Trigonia, Bruguiere. 

 Trigonia lamarckii, Gray. 



Trigonia lamarckii, Gray, Anu. and Mag. Nat. Hist., 1838, p. 482. 



Trigonia lamarckii, A. Adams, Proo. Zool. Soc. Lond., 1849, p. 159. 



Trigonia lamarcliii, Reeve, Concli. Icon., vol. xii. figs, la-lf. 



Trigonia lamarckii, var. reticulafa, Tenison-Woods, Proc. Linn. Soc. N. S. Wales, 1877, 



vol. ii. p. 125. 

 Tngunia pedinata, (non Lamarck) Stutelibur}', Zool. Journ., vol. v. p. 97, Tab. Suppl. xlii. 

 Trigonia peel inata, Canefri, Viagg. Magenta, p. 137. 



Habitat. — Port Jackson, Sydney, in 2 tn 10 fathoms. 



I would here remark that Trigonia jukesii, A. Adams, is identical with Trigonia 

 uniophora, Gray, and quite distinct from the present species, to which it is united 

 by Eeeve. 



Trigonia margaritacea , Lamarck. 



Trigonia margaritacea, Lamarclv, Anu. du Mus., 1804, vol. iv. p. 355, pi. Ixvii. fig. 2. 



Trigonia margaritacea, Sowerby, G6n. of Shells, pi. Ixxxiv. figs. 1, 2. 



Trigonia margaritacea, H. and A. Adams, Gen. Moll., pl. cxxiv. figs. 1-1//. 



Trigonia margaritacea. Reeve, Conch. Icon., vol. xii. figs. 3a-dcl. 



Trigonia margaritacea, Huxley, Proc. Zool. Soc. Lond., 1849, p. 31, pl. iii. figs. 1-3 (animal). 



Trigonia margaritacea, Huxley, Ann. and Mag. Nat. Hist. 1850, vol. v. p. 141. 



Trigonia margaritacea (fj, Selenka, Mai. Blat., 1868, vol. xv. \\. 66, pis. ii. and iii. 



Trigonia jKctinata, Lamarck, Anim. sans vert., cd. 2, vol. vi. p. 514. 



CJiama pcctinata, Wood, Index Test. SuppL, pl. ii. fig. 6. 



Habitat. — Station 162, off East Moncteur Island, Bass Strait, at a depth of 38 

 fathoms ; sand and shells. 



This species is also found at Port Lincoln, South Australia, the variety from that 

 region having the tuljercles on the ridges very much crowded. 



Trigonia uniophora. Gray. 



Trigonia uniopliora, Gray, Jukes' Voy. of the "Fly" (1847), vol. ii.. Appendix, p. 361, pl. 



ii. fig. 5. 

 Trigonia nnioplwra, Eeeve, Couch. Icon., vol. xii. i>l. i. figs. 2a, 2''. 

 Trigonia jukesii, A. Adams, Proc. Zool. Soc. Lond., 1849, p. 159, pl. iii. figs. 4-6. 



Habitat. — Near Cape York, off Albany Island, in :^ to 12 fathoms ; Stations 188 and 

 189, south of New Guinea, in 25 to 28 fathoms. 



