MELVILL : ADDITIONS TO THE GENUS LATIRUS. 167 



4. Latirus arabicus Melvill. 



Fiisiis arabicus J. C. INIelvill, Afein. Maiich. Soc., vol. xlii., no. 4, 



p. 16, pi. i., f. 6 (1898). 

 Latirus arabicus J. C. Melvill, Proc. Zool, Soc, Lond. 1901, vol. i., 

 part 2, p. 418. 



Shell attenuately lanceolate, slender, cinereous or cinnamon-brown, 

 darker over the ribs, nine whorled, two being apical, smooth, brown, 

 the remainder constricted suturally, ventricose, longitudinally thickly- 

 ribbed, ribs of the two lowest whorls 8-10 in number, these being 

 spirally crossed by revolving lirse or riblets, the interstices being 

 granuloso-lirate, mouth ovate, canal straight, prolonged, lip within 

 plicately striate, columella seven-plaited, plaits oblique, rather obscure. 



Long.: 34; diam.: 1 0*50 mm. 



Hab.: Maskat (Muscat), Persian Gulf, at entrance to the Gulf of 

 Oman, 15 fathoms, sand and mud. Mekran Coast to Karachi (rare), 

 F. W. Townsend. 



At first deemed a Fiisus, there can be no doubt now as to the 

 proper location of this species. With L. andanianicus Smith, it 

 stands somewhat alone in the genus, not far, perhaps, removed from 

 L. lanceola Reeve ("Conch. Icon. Turbinella," vol. iv., f. 12, 1847), 

 but with a 'facies' all its own. 



5. Latirus aurantiacus Verco. 



Litirus aurantiacus J. C. Verco, Trans. Royal Soc, S. Australia, 

 vol. xix., p. 89, pi. ii., f. I (1895). 



The following is a condensed description of this interesting unique 

 shell, which I only know by figure and description: — Shell very soUd, 

 rusty salmon coloured, whorls six, somewhat convex, roundly angled 

 just below the middle, provided with 8-9 well marked nodules. 

 Spiral lir;?e 8-10 in number, various in size, crossed by longitudinal 

 scabrous distant incremental lines. Sutures marginate, body whorl 

 with nine costae, the spiral liras here being almost equidistant, 16 in 

 number, with occasional intermediate spiral threads. Umbilicus 

 small, columella straight below, canal equalling yi of the whole 

 aperture, slightly recurved. Outer lip acute, inner thin, glistening 

 pearly white tinged with ferruginous, operculum ovate, acute, with 

 anteriorly situated nucleus. 



Long.: 46; diam.: 27 mm. 



Bab:: Backstairs Passage, S. Australia, i8| fathoms, dredged 

 alive. One unique example in the author's (Dr. Joseph C. Verco) 

 collection. 



Allied, according to the author, to L. concentricus Reeve. 



