300 STUDIES ON AUSTRALIAN MOLLUSCA, XL, 



the name of Natica stellatus Martyn. Three specimens of N. vitel- 

 lus (so-called) in the British Museum, from Ticao, have the oper- 

 culum of Cochlis. The real N. vitellus has not hitherto been 

 reported from Australia, but I have found it at the Palm Islands, 

 Queensland. And I have gathered N. stellatus Martyn, on Murray 

 Island, Torres Straits. 



Polinices conicus Lamarck. 



Natica conica Lamarck, An. s. vert., vi., 1822, p. 198. 



Natica pyramis Reeve, Conch. Icon., ix., 1855, PL 21, fig. 93. 



In the British Museum are two specimens, apparently types, but 

 not so marked, labelled "pyramis, Reeve, from Swan River, Aus- 

 tralia, found in sandy mud, 10 fms., Lt. Collie, R.N., M.C." These 

 specimens are certainly a white form of conicus, but their identity 

 has never been recognised. In the Geneva Museum, two types of 

 N. conica bear Lamarck's autograph label. 



Polinices aulacoglossa Pilsbry and Vanatta. 



Natica chemnitzii Reeve, Conch. Icon., ix., 1855, PL 2, fig. 7; 

 (not Natica chemnitzii Pfeiffer, Krit. Register Conch. Cab., 1840, 

 p. vii., for Chemnitz, Conch. Cab., v., 1781, p. 270, PL 188, fig. 

 1905-6); Id,, Angas, Proc. ZooL, Soc, 1867, p. 198; Id,, Adams, 

 Genera of Recent Mollusca, PL xxii., fig. 3 (animal). 



Polinices aulacoglossa Pilsbry and Vanatta, Proc. Acad. Nat. 

 Sci. Philad, lx., 1908, p. 558, PL xxix., fig. 1, 2, 3. 



Cyclostrema kingii Brazier Mss., Tenison Woods, Proc. Roy. 

 Soc. Tasm., 1877, p. 39. 



Under the name of Natica didyma Bolten, several related species, 

 representing one another in different seas, were lumped together by 

 Boog Watson, Tryon and other authors. That from the Peronian 

 region is an elevate, globose and narrowly perforate form called N. 

 chemnitzii by Reeve. The locality, unknown to its author, was 

 supplied by Angas. The bare name of Cyclostrema kingii, which 

 recurs at intervals in the literature of Tasmanian shells, refers to 

 the youngest growth-stage of this species. As Reeve's name was 

 spoilt by an earlier one of Pfeiffer's, Pilsbry and Vanatta have 

 lately redescribed the Australian shell as Polinices aulacoglossa. 



