158 SIPHON ALIA. 



Siphonalia nodosa, JIartyn (sp.). 



1784. Buecinum nodosum, Mart)Ti, Univ. Coneli. pi. v. 

 1832. Buecinum raphanus, Quoy and Gaimard, Voy. de I'Astrolabe, Zool. 

 t. ii. p. 428, pi. iii. figs. 3, 6. 



1841. Buecinum tritoit. Lesson, Rev. Zool. p. 37. 



1842. Buecinum triton, Lesson, id. p. 237. 

 1847. Fusus nodosus, Reeve, Concli. Icon. fig. 41. 



1873. Fusus nodosus, Von Martens, List Moll. X.Z. p. 18. 



1873. Fusits triton, Hutton, Cat. Marine Moll. X.Z. p. 11. 



1873. Fusus nodosus, Hutton, id. p. 11. 



1873. Fusus triton, Hutton, Cat. Tert. Moll. N.Z. p. 3. 



1873. Fusus nodosus, Hutton, id. p. 3. 



1880. Ncptuncea nodosa, Hutton, Man. N.Z. Moll. p. 50. 



1881. Siphonalia nodosa, Tryon, Manual of Concholocry, toI. iii. p. 136. 

 1893. Siphonalia nodosa, Hutton, Linn. Soc. N. S.W., Macleay Mem. Vol. 



p. 41. 



This is a shorter and smaller species than S. viandarina ; it is 

 relatively broader, and the spinose tubercles on the periphery 

 extend to the body-whorl even in the adult; the columella is 

 more deeply excavated, whilst the anterior canal is sharply twisted. 

 But the most characteristic difference, perhaps, is the protoconch, 

 which is conoidal, and composed of four and a half smooth turns, 

 commencing as an extremely minute point, and regularly increasing 

 in size, instead of being large, obtuse, and irregular, as in 

 S. mandarina. 



Dimensions (of a typical specimen). — Length 40 mm. ; breadth 

 21 mm. ; length of aperture and canal 21 mm. 



Form, and Log. — Pliocene : JS'ew Zealand. 



G. 9535. Three specimens of an elongate form, in which the 

 spinose tubercles become obsolete on the body-whorl and small 

 rugose costse take their place ; from "Wanganui. 



Sir James Hector Coll. 



G. 9633. A series exhibiting stages of growth, and several 

 variations in form ; from Shakespeare Cliff. Sir James Hector Coll. 



G. 9714. Two examples ; from Parimoa, Middle Island. 



W. JB. B. Mantell Coll. 



G. 9724. Specimens of the neanic stage of growth ; from 



Wanganui. {^Old Collection.) 



