REPORT ON THE GASTEROPODA. 139 



1. Scalaria aculeata, Sowerby. 



Scalaria aculeata, Sowerby, Proe. Zool. Soc. Lond., 1844, p. 12. 



„ ,, Sowerby, Thes. Conch., vol. i. pt. 4, p. 86, sp. 13, pi. xxxii. figs. 35-37. 



„ Angas, South Austral. Moll, Proc. Zool. Soc. Lond., 1865, p. 168, No. 77. 



„ „ Reeve, Conch. Icon., vol. xix. pi. vii. fig. 46. 



„ „ Nyst, Tableau du genre Scalaria, 1871, p. 14, No. 5. 



,, ,, Brazier, " Chevert " Exped. Shells, Proc. Linn. Soc. New South Wales, vol. i. p. 250. 



April 26, 1874. Port Jackson, Sydney. 6 to 15 fathoms. 



Habitat. — Malacca and Philippines (Sowerby), St Vincent's Gulf, South Australia 

 (Angas), Hong-Kong, China (Nyst), Torres Straits 20 fathoms and Papua 70 fathoms 

 (Brazier). 



This is a very variable species both as regards the strength of the shell, and the number of ribs 

 on the whorls. 



2. Scalaria juhesiana, Forbes. 



Scalaria jukesiana, E. Forbes, Appen. to Voy. " Rattlesnake," p. 383, pi. iii. fig. 7. 



„ „ G. E. Angas, Port Jackson Moll., Proc. Zool. Soc. Lond., 1867, p. 200, No. 80. 



,, „ Nyst, Tableau du genre Scalaria, 1871, p. 41, No. 165. 



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

 Habitat. — Port Jackson. 



Mr E. A. Smith agrees with me in considering this species as that of Forbes, though the 

 Challenger specimen is hardly full-grown, is a little narrower, and is somewhat rubbed. 



3. Scalaria tortilis, Watson (PI. IX. fig. 1). 



Scalaria tortilis, "Watson, Prelim. Report, pt. 15, Journ. Linn. Soc. Lond., voL xvi. p. 607. 



Station 24. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" W. Off Culebra 

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Shell. — Very long, with numerous small rounded whorls, broaclish, rounded distant 

 ribs, and close spiral threads, an impressed suture, and a broad, square, smooth base, defined 

 by a strong spiral thread. Sculpture: Longitudinals — There are on each whorl 14 rather 

 remote rounded ribs ; they slightly diminish in number and remoteness up the spire ; 

 they cross the whorls with a very slight trend but straight course toward the right ; they 

 do not extend to the base, which is quite plain but for slight hair-like lines of growth. 

 Spirals — there are on each whorl about 9 or 10 close-set, very little raised threads, parted 

 by minute furrows ; that defining the base is strong, and can be traced just above the 



