370 Mr. E. A. Smitli oti the Genera 



Mesalia ni^-Ianioidefi, Reeve. 



1849. Meaalia mehmioides, Reeve, Conch. Icon. vol. v. pi. i. fio;. 3. 

 1859. Turritelln {Mesalia) melanoides (sic) : Cheuu, Man. Coacli. vol. i. 



p. 317, fig. 2286. 

 1887. THrriteUa(Mesalia)melanoides (sic) : Tryon, Man. Cnnch. vol. viii. 



p. 20'.», pi. Ixv. fig. 32 (after Reeve). 

 1897. Mesalin melanoides (sic) : Kobelt, Conch. Cab., Tarritella, p. 74, 



pi. xxi. fig. 5 (after Reeve). 

 1913. Mesalia exilis, Sowerby, Ann. & Mag. Nat. Hist. vol. xii. p. 236, 



pi. iii. fig. 9. 



Hah. Unknown to Reeve. West Australia (Sjwerby). 



This species, of which only the shell is known, has an 

 altogether different aspect from that o£ the type of Mesalia, 

 having flatter whorls and numerous oblique costse upon the 

 upper part of the spire. The characters of the aperture, 

 however, show that it is rightly placed in that genus. 



In describing his AI. exilis Mr. Sowerby observed : — "The 

 actual position of this remarkable shell is uncertain, but I 

 provisionally place it in Mesalia on account of the charac- 

 teristic basal sinus." Such being his opinion, it is surprising 

 that he did not refer to Reeve's Monograph of the genu*, 

 published sixty-four years previously, or to other works 

 describing Mesalia, issued in the interval. Had he done so, 

 lie could not have failed to identify the shell lie proposed 

 describing with Reeve's M. mela»ioldes. Having compared 

 the type of that species and the actual shell described as 

 M. exilis, both being in the British Museum collection, I can 

 testify with certainty to their specific identity. 



The hgure in the Ann. & Mag. Nat. Hist, is not good ; 

 it shows the whorls too convex, and the basal sinus to the 

 aperture is badly depicted. 



Mesalia suhd cussata (Cantraine). 



1837. Scalaria suhdecussata, Cantraine, Opusc. de Zool. et d'Anat. 



comp. p. 13 ; id. Malac. M6dit. pi. vi. fig. 24 (1841). 

 1849. Tarritella incisa, Reeve, (/Ouch. Icon. vol. v. pi. xi. fig. 65. 

 1851. Mes'ilia striata, A. Adams, Proc. Zool. Soc. 1851, p. 279. 

 1855. Mesalia 2)licata, A. Ad. op. cit. 1855, p. 123. 

 1807. Mesalia striata: Hidalgo, Journ. de Conch, vol. xv. p. 394; 



Revista R. Acad. Cienc. Madrid, vol. i. p. 405 (1904). 



1868. Mesalia suhdecussata : Weinkauff, Conch. Mittelm. vol. ii. p. 323. 



1869. Eglisia suhdecussata : Fischer, Actes Soc. Linn. Bordeanx, 

 vol. xxvii. p. 115, 



1877. Acirsa suhdecussata: Jeffreys, Ann. & Mag. Nat. Hist. 1877, 

 vol. xix. p. 241. 



1878. Acirsa suhdecussata : Monterosato, Journ. de Conch, vol. xxvi. 

 p. 151. 



1884. Scalaria suhdecussata : Jefireys, Proc. Zool. Soc. p. 132. 



