A REVIEW OF THE VOLUTIDAE 



moderately rounded, axial sculpture at the 

 suture of small, little-raised folds, with 

 wider interspaces, not surpassing the width 

 of the fascicle; on the earlier whorls are 

 small, feeble, narrow axial riblets extend- 

 ing to the suture (on the antepenultimate 

 whorl fourteen), with wider Interspaces 

 somewhat unequal in width and covering the 

 whole shell; the entire surface is also 

 sculptured with a multitude of fine spiral 

 striae; outer lip thin, hardly arcuate; 

 inner lip smooth, the surface erased; pil- 

 lar anteriorly rapidly attenuated; anal 

 sulcus shallow and inconspicuous; canal 

 long and wide. 



Genus GUIVILLEA Watson I88I 



Gutvtllea, Watson, Voyage of H.M.S. Chal- 

 lenger, part Gastropoda, p. 26l, I88I. 



Vyvillea Watson: Prel. Kept., part 2, 

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

 532. 



Pseudoeymblum Cossman: in Essias de Pal. 

 Comp., vol. 3, p. 108, 1899. 



Genotype: Guivlllea alabastrina Watson. 



Range : Between Marion Island and the 

 Crozets. 



The texture of the shell is ex- 

 tremely delicate, but on the surface rough. 

 Straight columella which is without true 

 teeth, but has an abrupt break on the edge. 

 Suture channeled. 



Watson originally named this genus 

 Vyvillea Inhonor of his friend. Sir C. Wy- 

 ville Thomson. This name, however, proved 

 to have been preoccupied in I88O by Haswell 

 for a genus of Amphipodous Crustaceans, 

 published in the Proceedings of the Linjiean 

 Society of New South Wales, vol. 4, p. 336. 

 Due to this circumstance, he made the least 

 possible change by adopting the older form 

 of his friend's name. 



Guivlllea alabastrina Watson 

 (Plate 20, Figure I38) 



1881 



Hyvlllea alabastrina Watson: Prel. Rept., 



part 12, Journ. Linn. Soc. London, vol. 

 16, p. 332, 1881. 



Guivlllea alabastrina Watson, Voyage of 



J^ 



his Majesty's Ship, Challenger, part 

 Gastropoda, p. 262, plate 15, fig. 2. 

 Sowerby: Thes. Conch., vol. 5, 2nd 

 suppl., p. 304, plate I8, (Thes, plate 

 517) fig. 169. 



Alt, 162, dlam. 77 mm. 



Hab. Between Marion Island and the Crozets 

 in 1600 fms. Dredged December 30, 1873 . 



Animal with enormous bifid foot; 

 in-operculate; shell large, thin, white, 

 alabaster-like in texture; nucleus blxmt, 

 twisted; surface minutely granulated, with 

 the appearance of having been dipped in 

 sandy white-wash, and then roughly wiped; 

 whorls five and one-quarter; suture very 

 oblique, deeply impressed and a little 

 canaliculate. 



Genus HARPOVOLUTA Thiele 1912 



Harpovoluta , Thiele, Deutsche Sudpolar- 

 Expedition, xiii, p. 215, 1912. 



Genotype: Harpovoluta vanhb'ffeni Thiele, 



Range: Apparently abyssal, "Gaussberg." 



Harpovoluta vanhoffeni vanhoffenl 

 Thiele 1912 

 (Unfigured) 



Harpovoluta vanhoffeni Thiele, Deutsche 



Sudpolar-Expedition, xiii, p. 215, Tafel 

 14, fig. 1, 1912. Thiele: Handbuch der 

 System, Weichtlerkunde (figured). 



Alt. 45, diam. 26 mm. 



Hab, "Gaussberg," 



A partial translation from Thiele 's 

 description is as follows: 



The species is first of all charac- 

 terized by its dentition, in that the 

 radula is formed exactly as in Voluta (s.s.?) 

 the central teeth projecting consid- 

 erably above the other two. The foot is 

 without an operculxim, so large that it can 

 hardly be completely drawn back into the 

 shell. According to van Hoffen the animal 

 secretes a purple fluid. 



