Turritella. \ GASTROPODA. 267 



very perfectly conical, but the profile-lines are interrupted by the. 

 impressed sutures. Protoconch small, rounded, smooth, and glossy, 

 consisting of 1-J- embryonic whorls ; the next whorl is slightly angu- 

 lated, after which the regular sculpture begins. Whorls 15, very 

 slightly convex on the sides, contracting gradually upwards into the 

 suture ; towards the bottom of the whorls the contraction into the 

 suture is shorter, straighter, and more rapid ; they are of very gradual 

 and regular increase : towards the upper part of the spire the curve 

 of the profile-line of each whorl becomes increasingly stronger : the 

 base is flat, very slightly conical, sharply angulated, and not contracted 

 at the edge. Suture very slight, but well defined. Aperture small, 

 angularly rounded, a little higher than broad. Outer lip is a little 

 drawn in and advancing on the edge of the base, and a little patulous 

 in front of the pillar-point. The generic sinus in the outer lip is para- 

 bolic in form. Columella a little concave, rather direct, with a thin 

 rounded edge. Inner Up : There is not (though the specimens are 

 full grown) even a glaze across the body nor round the base of the 

 pillar, but on older specimens this may probably exist. (Watson.) 



Diameter, 7 mm. ; height, 24-5 mm. (type). Angle of spire. 15-20. 

 Penultimate whorl height, 3-75 mm. Mouth height, 4 mm.; breadth, 

 3-5 mm. 



Diameter, 11 -5mm.; height, 41mm. (specimen of 13 whorls, 

 Lyttelton). Diameter, 9 mm. ; height, 35 mm. (specimen of 14 whorls, 

 Tauranga). Diameter, 7 mm. ; height, 25 mm. (specimen of 12 whorls, 

 Auckland). Diameter, 14mm.; height, 52mm. (specimen of 15 

 whorls, 25 fathoms, Channel Island). 



Animal unknown. 



Type in the British Museum ; of T. vittata, Hutt., in the Dominion 

 Museum, Wellington. 



Hab. Queen Charlotte Sound, in 10 fathoms, type (' Challenger " 

 Exped.) ; North and South Islands, from between tide-marks to 

 110 fathoms ; Kermadec Islands (Captain Bollons). 



Remarks. The angle of the spire of the type, measured on the 

 figure, is 18, but this varies to nearly 20. Watson says that the 

 species resembles T. knysnaensis, Krauss, but I cannot agree with 

 him. T. Hanleyana, Reeve, seems to be a very nearly allied form, 

 but certainly not the young of T. rosea, Q. & G., as suggested by Tryon. 

 The sinus of the outer lip is not quite so deep as in T. rosea. 



Fossil in the Miocene and Pliocene. 



2. Turritella chordata, Suter, 1908. Plate 15, fig. 10. 

 Turritella chordata, Suter, P. Mai. S., viii, 39, pi. 3, f. 51. 



Shell small, subulate, moderately solid, spirally 1 irate, white. 

 Sculpture : The first H whorls are smooth, the next has 3, the follow- 

 ing 4, the fourth 5, and all the succeeding whorls 6 subequidistant 

 prominent flatly rounded spiral cords, the suprasutuial cord being less 



