SUTER : NEW ZEALAND PLEUEOTOMID-^. 201 



The differences between the two are too slight to separate them 

 as different species, and I therefore propose to make Maorum a sub- 

 species of Buchanani. 



Tryon and Hutton made P. Trailli, Hutton, a synonym of D. Maorum, 

 and I followed them in 1899 and later publications. This, however, 

 was a mistake, as will be seen presently. 



Type in the British Museum. 



2. Sttecctla Teailli (Hutton). 

 Pleurotoma Trailli, Hutton: Cat. Mar. Moll. New Zeal., 1873, p. 11. 

 JDrillia cemula, Angas : Proc. Zool. Soc., 1877, p. 36, pi. v, fig. 9. 

 Drillia hcetica, Hutton: Journ. de Conch., vol. xxvi (1878), p. 16 



(not of Reeve). 

 Pleurotoma Trailli', Hutton: Man. N. Zeal. Moll., 1880, p. 42. 

 Brillia Trailli, Tryon: Man. Conch. (1), vol. vi, p. 206. 

 Drillia (?) Maorum, Hutton : Proc. Linn. Soc. N.S. Wales (1), vol. x 



(1886), p. 116 (not of Smith). 

 Surcula Trailli, Suter : Trans. N. Zeal. Inst , vol. xxxi (1899), p. 90 ; 



I.e., vol. xxxiv (1902), p. 211 ; Index Faunae Nov. Zeal., 1904, 



p. 71. 

 Although the sculpture of the shell is generally the same as in 

 Buchanani and Maurum, yet the dimensions are very different : — 



The angle of the spire is 30°. 



Some months ago I saw for the first time the type -specimen of 

 Hutton's P. Trailli, and 1 at once saw that I was greatly mistaken 

 in judging this species to be synonymous with D. Maorum, E. A. Smith. 



Comparing the description of Drillia cemida, Angas, of which 

 specimens from New Zealand are in the British Museum, I come to 

 the conclusion that it is beyond a doubt the same species as P. 'Trailli, 

 Hutton. If the figure represents the natural size of the shell, then 

 it also agrees in its dimensions with Hutton's species, for it has 

 length 27, breadth 10 mm. The diagnosis gives the length as 27, 

 the breadth as 8 "5 mm., but the latter can hardly be correct. 



Hab. — Stewart Island. 



Type in the Colonial Museum, Wellington, New Zealand. 



