SuTEK. — On Nero Zealand Pleurotomidae. 71 



Key to Spkcies. 



1. Whorls cancellated. 



a. Spire as long as the body-whorl, about 15 ribs 



on the last whorl . . . . .. M. ula. 



b. Spire longer than the body-whorl, about 11 ribs 



on the last whorl . . . . . . . . M. dictyota. 



2. Whorls not cancellated, longitudinal ribs predomi- 



nant. 



a. Spire about the length of the body-whorl, about 



18 straight ribs on the body-whorl . . . . M. subaiLstralis. 



b. Spire longer than the body-whorl. 



aa. Ribs continuous over the whorls, about 

 10 on the last whorl, with spiral rows of 

 red dots . . . . . . .. M. goodingi. 



bb. Shell minute, about 16 flexuous ribs on 



the last whorl .. .. .. M. flexicostata. 



Mangilia goodingi, E. A. Smith. 



Smith, Ann. Mag. Nat. Hist. (5), vol. xiv., p. 320 (1884). 



Shell acuminately ovate, turriculate, white, ornamented 

 with series of red dots on the ribs, one above the periphery, 

 another near the base of the whorls ; there are 7 volutions, 

 the first two convex, the following slightly shouldered, almost 

 flat ; ribs continuous ; 9 to 10 prominent plicate ribs on the 

 last whorl, continuing to its base ; the whole shell with 

 minute close spiral striae; the body- whorl with a third series 

 of red dots towards the base. Aperture narrow, less than 

 half the length of the shell; outer lip thickened, slightly 

 sinuated ; canal narrow, short. 



Length, 7'5 mm. ; breadth, 2-7 mm. 



Type in the British Museum (Nat. Hist.). 



Hah. New Zealand. Foveaux Strait (A. Hamilton). 



The five prominent plicate ribs, which in the single speci- 

 men before me are continuous up the spire, and the spiral row 

 of reddish dots on the ribs, two on the upper whorls and three 

 on the last, are the principal distinctive characters of this very 

 elegant species (E. A. S.). 



Mangilia ula, Watson. 



Watson, Journ. Linn. Soc. London, vol. xv., p. 420 (1881) ; 

 "Challenger" Exp. Eep., pt. 42, vol. xv., p. 312, 

 pi. xxii., fig. 1 (1886). 



Shell rather short, fusiform, biconical, scalar, angulated, 

 obsoletely ribbed and with rather strong spiral threads. Snout 

 rather short, broadish and lop-sided. In the shoulder a 

 shallow, open, rounded sinus. 



Length, 6 mm. ; breadth, 3 mm. Aperture: Length, 3 mm.; 

 breadth, 1-5 mm. 



Type in the British Museum (Nat. Hist.). 



Hab. In 700 fathoms, ofi' East Cape (Stat. 169, Chall. 

 Exp.) ; one specimen. Obtained at no other locality. 



