MAEGINELLA. 87 



Subgenus GLABELLA, Swainson. 

 [Malacology, 1840, p. 324.] 



The principal distinguishing features of this subgenus are the 

 more or less conical form of the spire, which is well developed, 

 and the longitudinal plaits on the peripheral subangulation of the 

 body-whorl present in the majority of the species. The first 

 species mentioned by Swainson is quoted as "P. ruffina, Sw." ; 

 as it is not clear what he intended by that specific name, 

 M. hifasciata, Lamarck (one of the typical species mentioned 

 by Swainson), is here adopted as the type of this subgenus. 



In reference to M. ovata and M. cornea, two new species here 

 described from the Tertiary of New Zealand, it may be noted tliat 

 certain kinds of Marginella have been recognized in the newer 

 beds of that colony ; but for the most part these have neither been 

 figured nor described, unless, indeed, two or three lines of 

 remarks can be called a description. The present writer has not 

 been able to identify either of the species above mentioned 

 with the meagre descriptions alluded to, and is of opinion that 

 these latter ought to be suppressed as being of no real value to 

 systematists. 



Type. — Marginella lifasciata, Lamarck. 



Marginella (Glabella) turbinata, G. B. Sowerby. 



1846. MarijincUa turbinata, G. B. Sowerby, Thes. Conch, vol. i. p. 3S.5, 



pi. Ixxv. figs. 70-1. 

 1865. Marghuila turbinata, Reeve, Conch. Icon. vol. xv. pi. sxii. fig. 122. 

 1867. Marginella turbinata, Angas, Proc. Zool. Soc. Lond. p. 196. 



1878. Marginella turbinata, Tate, Traus. Phil. Soc. Adelaide, 1877-8, p. 86. 



1879. Marginella turbinata, Weinkauff, Conch. Cab. (ed. Kiister), p. 86, 



sp. 115, pi. xvi. figs. 9, 12. 

 1883. Marginella [Glabella) turbinata, Tryon, Manual of Conchology, vol. v. 



p. 23, pi. vii. figs. 4, 5. 

 1886. Marginella {Glabella) <Mr4tHfl'<a, "Watson, Toy. "Challenger," Zool. 



(Gasteropoda), vol. sv. p. 265. 



Shell volutiform ; spire very short, from two to three whorls, 

 body-whorl comprehensive, subangulate, and longitudinally plicated 

 on the shoulder ; aperture nearly as long as the shell, rather wide, 

 roundly contracted posteriorly, wider and broadly channelled 

 anteriorly ; outer margin much thickened, callous, the callosity 

 extending nearly to the apex of the whorls, and returning covering 



