476 GASTROPODA. [Pectinibranchia. 



second volution with a sharp median keel. Whorls 7, regularly in- 

 creasing, roundly angled at the middle by the nodules, concave above 

 and below it ; body-whorl slightly convex, contracted at the base. 

 Suture linear, bimarginate. Aperture oblique, oval, angled above, pro- 

 duced below into an oblique short and open canal, slightly notched 

 at its base. Outer lip sharp, somewhat strengthened on the outside, 

 moderately convex, contracted below, with a fairly deep and rounded 

 sinus in the depression above the row of nodules. Columella slightly 

 arcuate, excavated on meeting the parietal wall. Inner lip thin and 

 narrow, drawn out to a point towards the margin of the canal. Oper- 

 culum unknown. 



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

 Animal unknown. 

 Type in my collection. 



Hab. Dredged off Otago Heads (A. Hamilton). 

 Remark. Allied to D. ivanganuiensis. Hutt., from the Pliocene, 

 by the very strong sutural cord. 



3. Drillia multiplex, Webster, 1906. Plate 21, fig. 6. 



Drill in multiplex, Webster, T.N.Z.I., xxxviii, 1905 (1906), 306, pi. 38, f. 3. 



Shell fusiform, white and chalky. Sculpture : Each whorl is tabu- 

 lated below the suture, and the tabulation ends anteriorly in a 

 prominent spiral thread ; then follows a second tabulation, termi- 

 nating in a row of oval gemmules. about 15 on the last whorl ; just 

 posterior to the gemmules is a fine spiral thread carrying the abruptly 

 curved sharp threads of the anal sinus ; these threads are regularly 

 interspaced, elevated, and very distinct on both tabulations ; they 

 are covered by the first spiral, but override the second with a sharp 

 downward bend ; on the body-whorl they change their character, 

 becoming mere striations, and more numerous than in the fasciole of 

 the anal sinus. A second slightly gemmed thread appears on the body- 

 whorl, and 2 fine spiral lines on the anterior tabulation ; on the base 

 are 4 strong spirals, and on the canal about 10 much weaker. Colour 

 white ; fresh specimens are pale pink. Spire conic, very little higher 

 than the aperture. Protoconch of 1 whorls, glossy. Whorls 5, tabu- 

 lated, convex, the base contracted. Aperture pyriform, with a short 

 narrow and straight canal below. Outer lip broken off. Columella 

 straight, drawn out to a fine point below. Inner lip narrow, spreading 

 over the nearly straight parietal wall. Operculum unknown. 



Diameter, 2-5 mm. ; height, 5-5 mm. 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hab. Off Great Barrier Island, in 110 fathoms (type) ; off the 

 Poor Knights, in 70 fathoms (C. Cooper). 



