147 



and S. co7i.^ors, their habitat being given as St. Vincent Gulf : 

 and then sent the type of S. ronsors to the Brit. Mus. as from 

 Ceylon." No shell answering to its description has been found 

 in S. Aust. 



Scala valida, spec. nov. PI. iv., fig. 7. 

 Shell elongate, imperforate, 9 whorls. Protoconch con- 

 spicuous, submammillate, I4' whorls, at first smooth, then with 

 gradually developing axial costse ; it ends abruptly with a 

 faintly averted edge, and is followed by spirally striated 

 sculpture. Spire-whorls uniformly convex. Suture deep, 

 subcanaliculate. Body-whorl convex, with a bold, square, 

 subtuberculate peripheral rib ; base somewhat concave. Aper- 

 ture slightly oblique, roundly oval, faintly flattened anteri- 

 orly : border well defined, smooth, and flat ; at the base its 

 outer margin is not curved, but straight. Varices 12, 

 slightly advanced at the upper suture. 



Sculpture. — Axial ribs, 18 in the body-whorl, about as 

 wide as the interspaces, prominent, round, tapering at each 

 end, terminating at the peripheral rib, which widens to meet 

 them, and so becomes undulatingly tuberculate. Spiral lirge 

 12 on the body- whorl above the periphery crossing the costae 

 and extending to the aperture: 7 spiral lirse on the base in- 

 creasing in width towards the axis. The interstices between 

 all lirse spiral and basal and the edges of the peripheral rib are 

 punctate. 



Ornamenf.~T\\e shell is whitish. Three obscure spiral 

 light-brown bands, one tinging the peripheral rib, one just 

 below the centre of the whorls, and one midway between this 

 and the upper suture. The last band is chiefly represe«ited 

 by a small brown blotch on the rib behind each variceal costa. 



Length. 6*4 mm. : spire, 2*7 mm. : aperture, including the 

 rim, 1'6 mm. : width, 2'3 mm. 



Bah. — Backstairs Passage, deep water, 6 recent, none 

 alive. 



Type in Dr. Verco's collection. 



Variations. — The spiral lirse may be only 9 or may be 17. 

 One shell is 6'9 mm. in length, with 9 whorls. 



Scala morchi, Angas. 

 ficaJn (Cirsotrema morclii), n. sp., Proc. Zool. Soc., Lond., 

 1871, Jan. 3, p. 15, pi. i., f. 7; type locality, Port Jackson: op. 

 cit.. 1871. Jan. 17, p. 90, sp. 23: Trvon, Man. Conch., vol. ix.. 

 1887, p. 82, pi. 16, f. 7. 



Some twelve examples of this shell have been dredged 

 by me in the deeper waters of St. Vincent and Spencer Gulf, 

 and one at 104 fathoms, 35 miles south-west of the Neptune 



