EEPOET ON THE GASTEEOPODA. 177 



Nassa pauperata, A. Adams, Proc. Zool. Soc. Lond., 1851, p. 95, sp. 9. 

 „ „ Reeve, Conch. Icon., vol. viii. pL v. fig. 27. 



„ (Niotha) pauperata, Angas, South Austral. Moll., Proc. Zool. Soc. Lond., 18G5, p. 163, No. 40. 

 „ „ Angas, Port Jackson Moll., Proc. Zool. Soc. Lond., 1867, p. 190, No. 24. 



Tryon, Manual, vol. iv. p. 52, pi. xvi. figs. 288-291. 



Station 161. April 1, 1874. Lat. 38° 22' 30" S., long. 144° 36' 30" E. Off entrance 

 to Port Philip, Melbourne. 33 fathoms. Sand. . 



Station 162. April 2, 1874. Lat. 39° 10' 30" S. 3 long. 146° 37' E. Off East Moncceur 

 Island, Bass Strait. 38 to 40 fathoms. Sand and shells. 



April 17, 18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 



April 23, 1874. Port Jackson, Sydney. 6 to 15 fathoms. 



Station 163b. June 3, 1874. Lat. 33° 51' 15" S., long. 151° 22' 15" E. Port 

 Jackson, Sydney. 30 to 35 fathoms. Hard ground. 



Habitat. — South Australia, Port Jackson, and Tasmania (Angas). 



I have no doubt that these specimens belong to Nassa munieriana, Crosse (Journ. Conch., 1864, 

 vol. xii. p. 345, pi. xiii. fig. 6), but after very careful study I found it impossible to separate this form 

 from Lamarck's species, of which I regard it as only a depauperated variety. 



5. Nassa (Niotha) ravida, A. Adams. 



Nassa ravida, A. Adams, Proc. Zool. Soc. Lond., 1851, p. 97, sp. 38 (N. ranida). 

 „ „ Eeeve, Conch. Icon., vol. viii. pi. xi. fig. 68. 

 „ (Niotha) ravida, H. and A. Adams, Genera, vol. i. p. 117. 



„ „ Brazier, " Chevert " Exped. Shells, Proc. Linn. Soc. Now South Wales, 1877, 



vol. i. p. 179, No. 42. 

 „ „ splendidula var., Tryon, Manual, vol. iv. p. 52, pi. xvL fig. 286. 



October 6, 1874. Amboina. 15 to 25 fathoms. 



Habitat— Philippines, Burias (Adams), Torres Straits, 20 fathoms (Brazier). 



The Challenger specimens, which are unusually large, and have the pillar long, present a curious 

 combination of the features of Nassa and Phos. They have not the strong longitudinal ribs, nor, on 

 the subembryonic whorls, the oblique ribs of a Phos, but they have the sinus of the outer lip and the 

 projection of the anterior canal of that genus, united with the columellar callus and teeth of a Nassa, 

 and they have a posterior canal stronger than is usual in either genus. 



Mr Marrat considers that they should be classed under Nassa crcncllifera, A. Ad., but Mr E. A. 

 Smith very decidedly agrees in the view I formed of their place. 



6. Nassa (Niotha) siquijorensis, A. Adams. 



Nassa siquijorensis, A. Adams, Proc. Zool. Soc. Lond., 1851, p. 97, sp. 33. 

 ,, „ Eeeve, Conch. Icon., voL viii. pi. viii. fig. 53. 



„ (Niotha) siquijorensis, Tryon, Manual, vol. iv. p. 30, pi. ix. figs. 72, 73. 

 (zool. CHALL. EXP. — PART XLII. — 1885.) Tt 23 



