BY C. HEDLEY. 511 



are cut into beads by similar spirals, of which the antepenulti- 

 mate and penultimate have each four, and the last whorl nine, 

 besides four unbeaded ridges at the anterior end. The bead-row 

 below the suture is marked off from the rest by a deeper furrow. 

 Aperture narrow, lip thickened externally, armed within by five 

 denticles. Height 2*7 mm.; breadth 1-15 mm. 



Numerous specimens in 17-20 fathoms. The species is smaller 

 and more ovate than others of the genus which have reticulate 

 sculpture. 



Drupa RUBUsiDiEA Bolten. 



Drupa rubusidceus Bolten, Mus. Bolten. (2), 1798, p.55 (based 

 on Knorr, vi. t.24, fig.7). 



Among rocks on the weather-edge of the reef at low water we 

 found alive a shell which approaches nearer to the illustration of 

 liicinula reevemia Crosse* than to any other published figure. 

 An examination of Crosse's type enabled E. A. Smith to pro- 

 nounce it a variation of •" Sistrum hystrix Lamarck."! But 

 Lamarck's Pnpura hystrix% is merely a misinterpretation of 

 Murex hystrix Linne.§ For Hanley|| in his exposition of Linnean 

 t3^pes writes, that " Murex hystrix of Linnseus .... must 

 assuredly be regarded as an immature example of ricinus." 



Failing an earlier synonym, after discarding hystrix, it would 

 be necessary to employ reeveana. But Deshayes and Kuster 

 regarded Purpura spathulifera Blainville (1832), as equivalent 

 to hystrix of Lamarck. 



Antecedent even to the name of Lamarck is the Drupa rubus- 

 idoius of Bolten, whose citation of Knorr and Martini coincides 

 with the quotations of his successor. Bolten's name must there- 

 fore stand for the common tropical shell familiarly known as 

 Ricinida hystrix. 



* Crosse, Journ. de Conch, x. 1862, p. 47, pi. i. tig.2. 

 t Smith, Proc. Malacol. Soc. ii. 1897, p.230. 

 J Lamarck, An. s. vert. vii. 1822, p. 247. 



§Linn., Syst. Nat. x. 1758, p. 750. 

 I Hanley, Ips. Linn. Conch. 1855, p.295. 

 40 



