458 MOLLUSCA FROM THK HOPE ISLANDS, N. QUEENSLAND, 



M. apollinea Melvill, from the Persian Gulf,* is also larger, but 

 proportionately more slender. 



Mangelia naufraga, n.sp. 



(Plate xliv., figs.93-95.) 



Shell solid, narrowly fusifoim. Colour cream. Whorls seven, 

 including a small, smooth, two-whorled protoconch. Sculpture : 

 about eight prominent curved ribs undulate the suture, and 

 extend to the base; these are divided by broad and gently sloping 

 interstices. Across both ribs and furrows run fine, close, spiral 

 threads, amounting to 32 to 36 on the last whorl, and about one- 

 half that number on the penultimate. Between the threads are 

 microscopic radial bars. Aperture oval, anterior notch not 

 apparent, outer lip protected by a strong rib-varix, canal short. 

 Length 6; breadth 2 -3 mm. 



Var. conata, var.nov. 

 (Plate xliv., fig.94.) 



Shorter and broader than the species in chief, pale brown with 

 a chocolate peripheral band. 



The reef on \vhich the «' Endeavour " was wrecked, in 1770^ 

 lies immediately south of the scene of our dredging. 



A few specimens of the typical form and one of the variety, 

 from 5-10 fathoms, off the Hope Islands. I also took a few of 

 the typical form, in 17-20 fathoms, off Mast Head Island; and 

 received one from Mr. J. Brazier, which he dredged in Torres 

 Strait. 



In general character Cithara striatella Smith,f resembles this, 

 but the novelty is smaller, comparatively narrower, and closer 

 ribbed. Mangelia agna Melvill k Standen,:j: is more slender 

 and has fewer ribs. 



* Melvill, Proc. Malacol. Soc. vi. 1904, p. 166, Pl.x., f.20. 



[+ Smith, Ann. Mag. Nat. Hist, ser.o, xiv. 1884, p. 327. 



X Melvill & Standen, Journ. of Conch, viii. 1896, p.279, Pl.ix., f.l2. 



