748 ^ STUDIES ON AUSTRALIAN MOLLUSCA, xii., 



Under the name of Murex hippocastaneum, several species were 

 confused by Linne. His five original citations of it were dis- 

 tributed by Deshayes* thus: three are Drupa ririnns Linne, one 

 is Melongena galeodes Lamarck, and one an unrecognisable figure 

 by D'Argenville. Hanleyt observes that, in later publications, 

 Linne altered his mind, and shifted the name to F. pica Blain- 

 ville. So M. hippocastaneum can be reduced to a synonym of D. 

 ricinus or transferred to M. galeodes^ but it cannot be altered to 

 P. 2>ica, since that species was not included in the original refer- 

 ences of 1758. 



T. pica occurs along the whole coast of tropical Queensland. 



Thais costata Blainville. 



Purpura costata Blainville, Nouv. Ann. Mus., i., 1832, PI. xi., 

 fig.8; Id., Kiener, Purpura, 1836, p.61, Pl.xvii., fig.51 ; Id., 

 Kiister, Conch. Cab., 1858, pp.153, 181, P1.30, figs. 1 0-12 ; Id., 

 von Martens, Journ. Linn. Soc. Zool., xxi., 1889, p. 179. 



P. gradata Jonas, Zeit. f. Malak., 1846, p-14; Id., Philippi, 

 Abbild. Beschr., ii., 1846, p.l87, PI. xv., fig.2; P. trigona Reeve, 

 Conch. Icon., vii., 1846, PI. xi., fig. 53. 



This species does not seem to have been reported from Aus- 

 tralia. It occurred to me at Mapoon and Karumba, in the Gulf 

 of Carpentaria. Shirley; quotes 7%iis hcemdstoma Linne, from 

 Moreton Bay. This is a Mediterranean species, and it is impro- 

 bable that it should occur in the Pacific. 



Thais aculeata Regenfuss. * 



Purpura aculeata Regenfuss, Recueil de Coquillages, 1758, 

 p.viii., Pl.ii., fig. xviii.; Id., Deshayes, Anim. s. vert., x., 1844, 

 p. 104; Purpura hippocastaneum var., Quoy &l Gaimard, Zool. 

 Astrolabe, Moll., P1.38, figs.5, 6; /c?., Kiener, Purpura, PI. 12, 

 fig. 33; Id., Reeve, Conch. Icon., Purpura, 1846, PL viii., fig.34c. 



From the compound of M. hippocastaneum, Gmelin, this species, 

 first named by Regenfuss, was rehabilitated by Deshayes. If 



* Deshayes, Anim. s. vert., x., 1844, p. 65. 



t Hanley, Ips. Linnsei Conch., 1855, p.296. 



J Shirley, Proc. Roy. Soc. QueeAslaud, xxiii., 1911, p. 102. 



