184 THE VOYAGE OF H.M.S. CHALLENGES. 



Professor Seguenza holds Brocchi's fossil species in its Miocene and in some of its Pliocene forms 

 to be distinct from Nassa limata, Chemnitz. Professor Bellardi also regards the two as distinct, 

 pointing out in detail features of difference between them. Professor von Martens considers that both 

 forms are still living, the species of Brocchi in the Mediterranean, and that of Chemnitz in the 

 Atlantic, but refuses to separate them as distinct. I do not know the fossil form, and have therefore 

 followed the common estimate of the species. 



18. Nassa {Hebra) echinata A. Adams. 



Nassa (Hebra) echinata, A. Adams, Proc. Zool. Soc. Lond., 1851, p. 101, sp. 67. 

 ,i „ „ Eeeve, Conch Icon., vol. viii. pi. xx. p. 131. 



ii „ „ E. A. Smith, Andaman Shells, Proc. Zool. Soc. Lond., 1878, p. 810, No. 



31, pi. l. fig. 9. 

 ,i „ „ Tryon, Manual, vol. iv. p. 44, pi. xiv. figs. 223, 224. 



July 29, 1874. Levuka, Fiji. 12 fathoms. 



Habitat. — Philippines (Adams), Andamans (E. A. Smith). 



This species, like Nassa muricata, is placed by Adams in his sub-genus Hebra, and in the British 

 Museum in the sub-genus Utiza, but can belong to neither, the outer lip being strongly varixed and 

 internally lirate. 



The Challenger specimens present a somewhat depauperated form of this species, but in all 

 essentials agree with the type. In many respects they might be considered a spinose variety of 

 Nassa dclicata, A. Ad., but they are more glossy, not having the resinous sheen of that species, the 

 spire is more stumpy, the longitudinal ribs are fewer and straighter, and the spirals are much 

 stronger above, while on the base they are fewer and fainter. Varying from the type in size 

 as these specimens do, I was glad to have my identification of them decidedly confirmed by the 

 opinion of Mr Smith. In regard to Nassa muricata, Q. and G., to which Mr Tryon seems inclined 

 to unite this, it may be well to say, that apart from very palpable differences, the embryonic apex, 

 though very like, is higher and narrower, has a deeper suture, and a higher-placed carina than 

 Nassa echinata has. 



19. Nassa {Hebra) muricata (Quoy and Gaimard). 



Buccinum muricatum, Quoy and Gaimard, "Astrolabe," vol. ii. p. 450, pi. xxxii. figs. 32, 33. 

 ,, „ . Kiener, Iconographie, p. 93, sp. 92, pi. xxvii. fig. 110. 



„ „ Lamarck, Anim. s. vert. (ed. Desh.), vol. x. p. 198, sp. 79 (sec. Nasses). 



Nassa muricata, A Adams, Proc. ZooL Soc. Lond., 1851, p. 101, sp. 62. 

 ,, ,, Reeve, Conch. Icon., vol. viii. pi. xi. fig. 73. 



„ ,, Deshayes, Moll. Reunion, p. 129. 



„ (Hebra) muricata, v. Martens, MolL Mauritius, &c, p. 244. 

 „ „ „ Tryon, Manual, vol. iv. p. 44, pi. xiv. figs. 214, 21 S. 



July 29, 1874. Levuka, Fiji. 12 fathoms. 



