166 RECORL't OF IHK AUSTRAIJAX .MU.-EUM. 



tlie nmbo has ciu'lerl over aud concealed the luiiule furrow. Tlie consequent 

 [livoting' of the animal in its shell has bi'ought the foot from the veiitial 

 to the antcrii'r marofin (PI. .\.\,\iii., W^a. 11, 12). 



The Austialiau species of Tridnnni are as follows : — 



TiJll'ACXA CKOCKA, Lull(ttrcl\ 



(Plate xx.\., tig. 5). 



L'ludiia ijiijii.-' var. C, Dillwvn, Descri]). Cat., i., 1817, [i. lll4, for Chemnitz, 

 Conch. Cab., vii., 17bi, p. 12 4-, })1. xlix , iig. 496. 



Triihir)in ci-iH'vii, Ijaniai'ck, An. s. vert., vi., pt. i.. 1819, ]>. 106. ///., 

 Encv'clopedie Meth., ]>!. ccxxxv., tig. 2. hi., Clienii. llhistr. Conch., 

 1845, p. 2, pi. iv., tig. 2. /./., Woodward, Ann. Mag. Nat. Hist. (2), 

 XV., 1S55, ]). 100. lil., Reeve, Conch. Icon., xiv., 1862. pi. viii., 

 tig. 9. Id., Kuster, Conch. Cab., 2 Ed., viii., 4, 1868, p. 6, pi. i., tig. 

 6. /'/., Tapparone Canefri, Bull. Soc. Zool. Fiance, iii., 1878, p. 276. 

 /(/., Martens in Mobius Meersfanii. Mauriliiis, 1880, p. 328. bJ., 

 Sowerby, Tlies. Conch., v., 1884, ji. 181, pi. cccclxxxvi., tig. 6, pi. 

 cccclxxxvii., tigs. 9-10. /»/., Smith, Chall. Expcd. Zool., xiii., 1885, 

 |). 170. hi., Hidalgo, :Mem. H. Acad. Cienc. Madrid, xxi., 1903, 

 p. 397. hi, Lynge,' D. Kgl. Danske Vidensk. Selsk. Skrifter, 7, t. v., 



1909, p. 263. hi., Hedley, Report Austr. Assoc. Adv. Sci., xii., 



1910, p. 348. Id., Hirase", lllustr. Thousand Shells, Pt. 3, 1915, 

 ]>1. xxix., tig. 1 43. 



Chuinuelrarliiua rrnrrn, P'rauenfeld, Verhandl. K. K. Zool. Bot. lies. Wien, 

 xix., 1869, p. 884. 



Triddi'iiii iinifira, Qiioy & fiaimard, Zool. Astrolabe, iii., 1835, p. 490, pi. 

 Ixxx., tigs. l-;> (not of liamarck). 



ChiUiKict rih'lii(i'i( >^r,ijdtii, H. A A. ,\danis. tien. Hec. Mollnscn, ii., L-^57, p. 

 465, ]»1. c.xiii., tig. 2. /-/., Schmeltz, Cat. Mns. (Jt.deffrov, v., 1874, 

 f). 172. 



Tridiirtiii ffrrii'iiiicii, Kceve, Conch. Icon., .\iv., l8()2. pi. viii., tig. 8. 



'rn'd,ii-)hi i-ii iiiiii'jii , Kceve, Conch. Icon., xiv., l8()2, pi. vii., tig. 7. 



I'u-dK-ii, Lesson, Diet. Class, d'hist. nat., xiii., I8<i2, p. 2'9. 



IIkIi. — Cape York, S I'nth. (Challengei' Expedition). Hope Islands 

 (He(lley). Dunk Island (Bantieldj, Queenslanil. 



