62 



A REVIEW OP THE VOLUTIDAE 



Range: Southeast coast of South America. 



Separable on account of the exten- 

 sion of the mantle and modification of the 

 shell; nuclear portion of the shell similar 

 to that of Adelomelon. d'Orbigny carefully 

 figured the soft parts. 



Zidona angulata (Swainson) 1821 

 (Plate 13, Figures 93, 96) 



Vol'ita angulata Swainson, Exotic Conch., 1, 

 pi 3. 5 and k. Sowerby: Thes. Conch., 

 vol. 1, p. 202, pi. 47, figs. 13, 1^1, 

 18^7. Reeve: Conch. Icon., pi. 15, 

 fig. 35, 1849. 



Voluta nasslca Schubert and Wagner, Suppl. 

 bd. Conch. Cab., 12, p. 10, pi. 217, 

 figs. 3031, 3032, 1829. 



Volvta dufresnei Donovan, Nat. Repos., 2, 

 pi. 61, 1823. 



VolutellJi aniulata d'Orbigny: Voyage Ameri- 

 can, 5, p. 423, pi. 60, figs. 1-3, 1841. 

 Gray: Guide Moll. British Mus. p. 35, 



1857. 



Voluta aniulata. Wood: Index Test. Suppl., 

 Voluta number 21, 1828. Kiener: Icon. 

 Coq. Viv., Voluta, p. 65, pi. 38, 1839. 

 Tryon: Man. Conch., vol. 4, p. 98, pi. 

 29, figs. 112, 121, 1882. Lahille: 

 Rev. Mus. de la Plata, 6, p. 305, (ex- 

 tras, p. 15), pi. 1, figs. 5-8; pi. 2, 

 figs. 69-78; pi. 6 and pi. 9, 1895. 



Voluta (volutella) aniulata. Crosse: J. 

 de C, 19, p. 301, 1871 ; Tryon: Struct. 

 Syst. Conch., 2, p. l64, I883. 



Zidona aniul-ata. H. and A. Adams: Genera 

 Rec. Moll,, vol. 1, p. 161, 1853; 2, p. 

 618, 1858. Fischer: Man. Conchyl., 

 p. 605, 1883. 



Alt. Sometimes exceeds I75 mm. in length. 

 Diam. 125 mm. 



Hab. Southeast coast of South America; 

 Rio Grande Do Sul, Brazil, south to the 

 Bay of San Bias, Patagonia, on sandy 

 bottom in comparatively shallow water. 



Lahille described several varieties. 

 Outstanding characters of the shell in- 

 clude the wide disposition of the enamel 

 upon the spire, the broad shoulder and the 

 three, widely spaced, indistinct plaits 

 upon the columella. In well-developed ex- 



amples there is often an apical spur of 

 callus, which may reach a length of more 

 than one inch beyond the apex, this however 

 is often missing in damaged or juvenile 

 specimens. 



Genus PROVOCATOR Watson I88I 



Provocator Prel. Rept., part 12, Journ. 



Linn. Soc. London, vol. 16, p. 329, I88I. 



Genotype: Provocator pulcker Watson. 



Range : Between Kerguelen and Heard Islands 

 (Watson) . 



Provocator provocator (Sowerby) 

 (Plate 13, Figure 95) 



Voluta provocator Sowerby, Thes. Conch., 



vol. 5, 2nd suppl., p. 305, pi. 18 (Thes. 

 pi. 517), fig. 173. 



Provocator pulcher Watson, Prel. Rept., 



part. Journ. Linn. Soc. London, vol. I6, 

 p. 330, 1881. Voyage H.M.S. Challenger, 

 part Gastropoda, p. 260, pi. I3, fig. 5, 

 1885. 



Alt. 87, Diam. 45 mm. 



Hab, Off Cumberland Bay, Kerguelen, in 

 105 fms.; also between Kerguelen and 

 Heard Islands in I50 fms. 



Shell smooth, fusiform, rather thin, 

 with a high, sharp, slightly enameled apex, 

 a contracted and elongated base, a straight 

 two-toothed pillar, a large mouth, a prom- 

 inent angulated and patulous outer lip, and 

 a strongly marked sinus at the enameled su- 

 ture. Sculpture: Longitudinals, the smooth 

 surface is scored with fine hair-like flex- 

 uous lines of growth. Spirals, there are 

 some lines in the substance of the shell 

 which are best recognized without a lens, 

 there are also some irregular white lines 

 connected with some slight thickening of 

 the glaze; below the scar of the sutural 

 sinus is an obsolete angulation. Besides 

 all this, the surface of the enamel of the 

 shell is obsoletely tubercled obliquely. 

 Color rich buff, thinly overlaid with a 

 whitish glaze; this for some distance below 

 the suture is covered with a dullish buff 



