A REVIEW OF THE VOLDTIDAE 



27 



the last whorl adjacent to the suture; 

 ground color, ivory, overlaid with a pat- 

 tern of zig-zag, chestnut brown lines, 

 forming three darker zones on the body 

 whorl; four primary, anterior plaits, and 

 one secondary posterior plait, base of the 

 columella oblique; furrows upon the parietal 

 wall, covered with callus, and running 

 parallel with the axis; outer lip thickened 

 and extended. 



The line of descent of h. iracills 

 has for long been separated from that of 

 A. arabica, and probably came through A. 

 finlayi of Awamoan age. 



The height of the spire varies from 

 less than half to about two-thirds that of 

 the aperture. Sometimes the shoulder nod- 

 ules are present on the body whorl, but 

 often they are quite obsolete. 



Alcithoe hedleyl Murdock and Suter I9O6 

 (Plate 23, Figure I58) 



Fuli'iraria {Alcithoe) Hedleyl Murdoch and 

 Suter, Trans, N. Zeal. Inst. vol. 38, 

 1905 (1906), 288, pi. 23, figs. 20, 21. 



Put iuraria Hedleyi. Suter: Man. N. Zeal. 

 Moll. p. 448, pi. 20, fig, 7, 1913. 



Alcithoe hedleyi (M.and S.). Powell: 

 Shellfish of N. Zeal. p. 81, species 

 1089. 



Alt. 61, diam. I8 mm. (Holotype). 



Hab. Off Great Barrier Island, in 110 



fathoms (type locality); four miles west 

 of Guvier Island, in 44 fathoms (Cap- 

 tain Bollons). Holotype in the Domin- 

 ion Museum, Wellington. 



The original description is as 

 follows : 



Shell elongato-fusiform, spire 

 rather long, acuminate, costate; body-whorl 

 smooth, with fine longitudinal zig-zag 

 markings; columella with 4 plaits. Sculp- 

 ture: The protoconch has 1 or 2 spiral 

 threads; the following whorls of the spire 

 are distantly axlally costate, the costae 

 extending over the lower two-thirds of each 

 whorl, 10 on a volution; a few costae are 

 situated on the body whorl above the aper- 

 ture, but the remainder is smooth; growth- 

 lines are visible on all the whorls, more 

 distinct and close together on the last 

 whorl; with a lens a number of spiral lines 



may be distinguished below the shoulder of 

 the whorls. Golor: No live specimens hav- 

 ing been obtained, it is impossible to 

 guess the color of the shell, which is most 

 likely light fulvous; fine longitudinal 

 brown zig-zag lines ornament all the whorls, 

 except the protoconch. The spire is much 

 shorter than the aperture, conical, acumi- 

 nate but obtuse. Protoconch consists of 2 

 slightly bulbous whorls; the nucleus is 

 slightly lateral, smooth; the second whorl 

 has one or two spiral threads. Whorls 7, 

 shouldered, first slowly then rapidly in- 

 creasing in height. Suture distinct, but 

 not Impressed, retrocurrent on reaching the 

 aperture. Aperture high and narrow, slight- 

 ly canaliculated at the upper angle, very 

 little narrowed at the base, where it is 

 broadly truncated and slnuated. Outer lip 

 forming a very light curve, nearly straight, 

 thickened and rounded above, thinner near 

 the base, smooth, not expanded. • Golumella 

 very slightly excavated near the middle, 

 with 4 almost equidistant and very oblique 

 strong plaits, all of nearly equal size, 

 narrowed below into a sharply rounded beak, 

 which extends beyond the basal margin of the 

 outer lip. Inner lip thin, shining, broad- 

 ly expanded on the body whorl, and with a 

 few longitudinal striae, narrower upon the 

 pillar. 



Soft parts unknown. 



Alcithoe jaculoldes Powell 1924 

 (Plate 8, Figure 66) 



Alcithoe arabica, subspecies jaculoldes 



Powell, Proc. Mai. Soc, London, vol. 16, 



p. 108, figs. 1-3, 1924, 

 Alcithoe jaculoldes . Powell: Shell Fish 



New Zealand, p. 8I, species IO8I, plate 



12, fig. 5, 1957. 



Alt. 109, diam. 4l mm. 



Hab. Off Whakatane, Bay of Plenty, in 

 40-50 fathoms, and Guvier Island in 

 40 fathoms. New Zealand. 



Shell large, solid, fusiform. 

 Whorls seven and one-half. Protoconch mod- 

 erately large, of two and one-half smooth 

 bulbous whorls; the following three whorls 

 showing faint to moderately strong axial 

 costae, and the remaining two, prominently 

 shouldered with a row of strong, laterally 



