288 Transactions. 



23. Fulguraria (Alcithoe) hedleyi, n. sp. Plate XXIII, 



figs. 20, 21. 



Shell elongato-fusiform, spire rather long, acuminate, costate, 

 body-whorl smooth, with fine longitudinal zigzag markings, 

 columella with four plaits. Sculpture : The protoconch has one 

 or two spiral threads, the following whorls of the spire are 

 distantly longitudinally costate, the costae extending over the 

 lower two-thirds of each whorl, ten on a volution ; a few costae 

 are situated on the body above the aperture, 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. Colour : No live specimens having been obtained, 

 it is only possible to guess the colour of the shell, which is most 

 likely light-fulvous ; fine longitudinal brown zigzag lines orna- 

 ment all the whorls, except the protoconch. The spire is much 

 shorter than the aperture, conical, acuminate but obtuse. 

 Protoconch (fig. 21) consists of two 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 increasing in height. Suture distinct but not impressed, 

 retrocurrent on reaching the aperture. Aperture long and 

 narrow, slightly canaliculated at the upper angle, very slightly 

 narrowed at the base, where it is broadly truncated and sinuated. 

 Outer lip forming a very light curve, nearly straight, thickened 

 and rounded above, thinner near the base, smooth, not expanded. 

 Inner lip thin, shining, broadly expanded on the body and with 

 a few longitudinal striae, narrower on the columella, which is 

 very slightly excavated near the middle, with four almost equi- 

 distant and very oblique strong plaits, all of nearly equal size ; 

 columella narrowed into a sharply rounded beak, which extends 

 beyond the basal margin of the outer lip. Altitude, 61 mm. ; 

 diameter, 18 mm. Aperture : length, 39 mm. ; breadth, 7 mm. 

 Angle of spire, 32°. 



Type in the Colonial Museum, Wellington. 



Obs. Two specimens, only one adult, were obtained, and they 

 had evidently been buried in the mud for a considerable time. 

 This species is nearly allied to F. gracilis, which attains about 

 the same length, but is much more ovoid, has more numerous 

 costae on the whorls, and a much wider aperture. Our species 

 has the body-whorl subcylindrical, the zigzag markings much 

 finer and not crowded. 



The species is named in honour of Mr. Charles Hedley, of 

 the Australian Museum, Sydney, the originator and leader of our 

 dredging expedition. 



