98 Transact ions. 



vertically to basal margin, giving shell a folded aspect. Anterior dorsal 

 margin descends gradually, straight at first and then according with broadly 

 convex anterior end. Posterior dorsal margin incomplete ; descends steeply, 

 apparently slightly concave, to narrowly produced posterior end. Anterior 

 end rather imperfect, but evidently angled with gently sinuous basal 

 margin, which rises obliquely towards narrowing posterior end. 



Lunule not marked off, raised centrally, oval. Ornamentation shown 

 only on isolated remnants of original surface ; narrow, shallow concentric 

 grooves, somewhat irregularly excavated, closely spaced, about 2 per milli- 

 metre. Radiate close lines visible on surface of cast but not on shell itself. 

 Hinge and other internal characters unknown. 



Length, actual 37 mm., restored approximately 42 mm. ; height, 

 32 mm. ; diameter, 18 mm. 



Holotype and one paratype (both imperfect) in Auckland University 

 College collection. 



Locality : Okahukura Tunnel. Collected by R. P. Worley, 1916. 



Siphonalia propenodosa n, sp. (Plate VII, figs. 7 and 8.) 



Oval turreted shell, solid, fairly large, closely approaching 8. nodosa 

 (Mart.) but distinct in sculpture. Whorls 8J, protoconch apparently 2| 

 whorls, the first smooth, the others axially costate. Spire short, angle 55°, 

 whorls gradually increasing. Suture not impressed, slightly sinuous. 

 Whorls somewhat angled, and lightly excavated above the angle. Aper- 

 ture imperfect on the holotype, but well shown in a paratype ; high, oval ; 

 outer lip fairly thin, slightly callous, and finely notched or crenulate within; 

 faintly angled at both keels of body-whorl. Posterior notch very distinct ; 

 anterior canal oblique, strongly recurved, broad, short, and truncated at 

 base. Columella slightly excavated above and inflected to the left at canal. 

 Inner lip spread broadly on body-whorl ; siphonal fascicle distinct, crossed 

 by coarse lamellae. Height of aperture and canal about twice height of 

 spire. 



Ornamentation of spiral threads especially strong on base of body-whorl 

 and with finer interspaced threads particularly prominent there. On later 

 spire-whorls and on body-whorl close below suture is a spiral row of minute 

 elevated tubercles on a somewhat indistinct keel. On the whorls, at the 

 prominent carina at the angle, is a conspicuous spiral band of about 11 

 sharp nodules merging in earlier spire-whorls into distinct costae which run 

 to the anterior suture. 



Besides these two rows of tubercles on the body - whorl are two 

 others — one prominent one on the lower of the carinae of the body- 

 whorl, and a faint one on the base a little below this last. Growth-lines 

 strongly shown and numerous on the body-whorl. 



Height, 32 mm. ; diameter, 18 mm. 



Holotype and two paratypes in author's collection. 



Locality : Coast near Kawa Creek, south of Waikato River, Auckland. 

 Collected by Bartrum, 1917. 



Remarks. — The late Mr. Suter remarked : " Near S. nodosa (Mart.), but 

 distinguished from it by the row of tubercles below the suture, and a fourth 

 row upon the base. The former character brings it near S. conoidea (Zitt.), 

 from which, however, it is quite distinct."'* 



* Personal communication. 



