472 GASTROPODA. [Pcctinibranchia. 



KEY TO SPECIES. 



A. Whorls strongly keeled, keel ornamented with oblique gemmules : 



axial sculpture consisting of growth-lines only . . . . auyusta. 



B. Whorls shouldered, with axial and spiral threads and riblets . . eremita. 



3. Turris augusta, Murdoch and Suter, 1906. Plate 21, fig. 3. 



Pleurotoma (Leucosyrinx) augusta, M. & S., T.N.Z.L, xxxviii, 1905 (1906), 

 286, pi. 22, f. 14-17. 



Shell fusiform, slender, fragile, spire and aperture of about the 

 same height, whorls with a spiral keel bearing small nodules, canal 

 long. Sculpture : The whorls are strongly keeled at the periphery 

 and with a row of gemmules set slightly oblique thereon ; on the last 

 whorl there is a lower smooth keel present ; a few inconspicuous spiral 

 striae are on the area between the keels and on the anterior extremity ; 

 the axial sculpture consists of minute and irregular growth-lines only. 

 Colour pure - white, slightly shining. Spire pagodiform. elongated. 

 Protoconch smooth and shining, consisting of about 2 turns ; the 

 nucleus is slightly tilted, and with a distinctly marked smooth carina, 

 which is much strengthened on the succeeding whorl. Whorls 7, 

 regularly and rather slowly increasing, the last biangulate. concave 

 below the keels, and produced into a rather long, narrow, and truncated 

 beak. Suture deep, minutely bimarginate. Aperture angularly ovate, 

 broadly angled above, contracted below, and terminating in a rather 

 long open canal, which is somewhat turned to the left. The outer lip 

 is biangled and concave above, between, and below the angles ; sinus 

 broad and moderately deep, extending almost from the suture to the 

 keel. Cohnnella nearly straight and slightly twisted, ending in a fine 

 point on the left margin of the canal. The inner lip spreads as a very 

 thin narrow callus over the concave parietal wall and the columella. 



Diameter, 3-9 mm. ; height, 10-3 mm. 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hab. Off Great Barrier Island, in 110 fathoms. 



Remark. The species is allied to T. alta, Harris ( = pagodti, Huttoii, 

 not of Reeve), from which, however, it may be distinguished by the 

 gemmules on the keel and the distinct carina on the protoconch. both 

 of which characters are absent in the Tertiary fossil. 



4. Turris eremita, Murdoch and Suter, 190('i. Plate 21. fig. 4. 



Pleurotoma (Leucosyrinx) eremita, M. & S., T.N.Z.I., xxxviii, 1905 (190(5), 

 287, pi. 22, f. 18, 19. 



Shell small, fusiform, fragile, with shouldered whorls, the aperture 

 but slightly shorter than the spire, and a rather short open canal. 

 The sculpture consists of axial and spiral threads and riblets, the former 

 inclined slightly backward ; the axial threads number about 15 on the 

 penultimate whorl and are obsolete above the angle, absent upon the 

 greater part of the last whorl. The spirals consist of 5 minute threads 



