BY C. HEDLEY. 745 



Typical Z. atkinsoni is larger, more solid, more constricted, 

 with fewer and more prominent ribs. Since it has not yet been 

 illustrated, I present a figure of an authentic specimen, kindly 

 communicated by the Rev. H. D. Atkinson, whose name it bears. 

 The species in chief, as well as the variety, occur near Sydney. 



Zafra lurida Hedley. 

 (Plate Ixxxiii., fig. 73.) 



Pyrene lurida Hedley, Proc. Linn. Soc. N. S. Wales, xxxii., 

 1907, p.510, PI. 17, fig.l9. 



The variation of related forms is followed by Z. lurida. It 

 It may be translucent with opaque white dots on the shoulder, 

 periphery, and base. These dots may be outlined by brown 

 arrow-heads, which again may be united to those above and 

 below by narrowed waved or crooked lines. On a pellucid 

 ground, there may appear a brown peripheral band margined 

 by an opaque Avhite line or dots, as in the figure. The apex 

 is frequently purple. 



MUREX PERM^STUS, sp.nOV. 



(Plate Ixxxv., fig.91.) 



Murex monachus capucinus Chemnitz, Conch. Cab., xi., 1795, 

 p. 123, PI. 19 2, figs. 1849, \^bO\ Murex capucinus Kiener, Coq. Viv., 

 Murex, 1843, p.42, PI. xlv., fig.2; M, Reeve, Conch. Icon., iii., 

 1845, Murex, PI. ii., fig.lO; Id., Brazier, Cat. Australian Shells, 

 Murex, 1893, p. 58. (Not Murex capucinus Lamarck, Anim. s. 

 vert., vii., 1822, p.l64). 



A large, massive, dark red shell, four and three-quarter inches 

 long, was named Murex capucinus by Lamarck. The type of 

 this is still preserved in the Geneva Museum, where I had the 

 privilege of inspecting it, in October, 1912. As the description 

 would suggest, this type proved quite diff'erent from that which, 

 both in books and in Museums, is called Murex capucinus. 

 Universal error arose from misapprehension of Lamarck's refer- 

 ence to the account of Chemnitz. The diflferent and adult form 

 described and figured by the latter was erroneously cited by 

 Lamarck as " specimen juvenis " of his greater Murex. Reach- 



