156 THE VOYAGE OF H.M.S. CHALLENGER. 



Station 187. September 9, 1874. Lat. 10° 36' S-, long. 141° 55' E. Near Cape 

 York. 6 fathoms. Coral mud. 



Habitat. — Port Jackson (Angas). 



Lamarck says of this species that its " caractere essentiel consiste en ce que les 3 ailes mem- 

 braneuses dont elle est munie sont interrompues sur tous les etages de la spire, et ne sont 

 continues que depuis le sommet du dernier tour jusqu'a l'extrernite de la queue." His own 

 specimen in the Geneva Museum has distinctively this feature, but it is one given to it by too 

 rough cleaning with acid. This has, as usual, destroyed the whole surface and removed a large part 

 of the thin continuous laminae, which have besides been broken by violence. 



15. Murex (Pteronotus) triformis, Eeeve. 



Murex triformis, Eeeve, Conch. Icon., vol. iii. pi. xiii. fig. 53. 



„ „ Kiister, Conch. Cab. (ed. Kiister), p. 85, sp. 92, pi. xxx. fig. 4. 



„ (Pteronotus) triformis, Angas, South Austr. Moll., Proc. Zool. Soc. Lond., 1865, p. 157, No. 3. 



„ „ „ Kobelt, Jahrb. d. deutsch. malak. Gesellsch., 1877, p. 161. 



„ triformis, Sowerby, Thes. Conch., pts. 33, 34, p. 21, sp. 96, pi. ccclxxxix. (x. Gen.) fig. 92, 



pi. cccxcii. (xiii. Gen.) fig. 126. 

 „ (Pteronotus) triformis, Tryon, Manual, vol. ii. p. 85, pi. xL fig. 511. 



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

 Island, Bass Strait, South Australia. 38 fathoms. Sand and shells. 



Habitat. — New Holland (Reeve), Port Lincoln, South Australia (Angas). 



16. Murex (Pteronotus) cordismei, Watson (PI. X. fig. 5). 



Murex (Pteronotus) cordismei, "Watson, Prelim. Eeport, pt. 15, Journ. Linn. Soc. Lond., vol. xvi, 



p. 601. 



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

 cceur Island, Bass Strait. 38 fathoms. Sand and shells. 



Shell. — Thinnish, pale, fusiform, biconical, scalar, with three foliated and spinous 

 varices, an elongated spire, a papillary tip, tubercled rounded whorls, an elongated 

 scarcely constricted base, and a large flat snout. Sculpture : Longitudinals — there are on 

 each whorl three foliated varices, which at the corner of the shoulder rise into a semitubular, 

 upturned, and slightly reverted spine ; they run out on the snout : between each two 

 varices and nearly on a level with the spines are three large prominent rounded tubercles, 

 which are somewhat produced longitudinally ; the lines of growth are very slight. 

 Spirals — besides the carination caused by the line of tubercles and spines, there is on the 

 base a slight angulation. Colour pale. Spire rather high, conical, scalar. Apex consists 



