"TERRA NOVA" EXPEDITION. 



A very common shell, which has Keen referred to the C. wnlcntu of Gmelin by 

 lliitton, Harris, and Tryon, and Sntei 1 also appears to lie of the same opinion, although 

 lie adopts Sowerby's name because, he says, it "was first figured." This, however, is 

 not true, since Gmelin's C. aculcntn was figured by Chemnitz in 17SS. The latter, 

 however, is a very different shell from (.'. i-nxtntii. and does not occur in New Zealand. 

 It differs from the New Zealand species not only in its form and prickly sculpture, but 

 also in the character of the internal septum, which has a waved free margin, and not 

 an almost straight margin, as in tvxttitn. 



10. Sigapatella novce-zelandice (Lesson). 



Calyptrsea (Sigapatella) novse-zelandise, Lesson, Voy. " Coquille," Zool., vol. II, p. 395 (1830). 

 Calyptrsea novse-zeelandise : Suter, Trans. N.Z. Inst., vol. XXXVIII, p. 326 (1905). 



Crepidula maculala, Quoy and Gaimard, Voy. " Astrolabe," Zool., vol. Ill, p. 422, pi. LXXII, 

 figs. 6-9 (1835). 



Culyptrsea maculnta* : Deshayes, Anim. sans Vert., ed. 2, vol. VII, p. 628 ; Suter, Man. 'N.Z. 

 Moll. p. 285, pi. XIV, figs. 3, 3A (subgen. 



Station, on the beach. Spirits Bay, near North Cape, New Zealand. 



Although Mr. Suter admits that Lesson's name has priority over that of Quoy 

 and Gaimard, he adopts the latter because the species was first figured by these 

 authors. But this conclusion is not admissible, since a species, if recognisable from 

 an unillustrated description, must always lie accepted. 



With regard to the generic position of this shell it seems to me to differ from 

 ( 'iih/f>l.rii'ii. sufficiently to warrant its separation. The character of the septum in C. 

 rlihu'iixix, Linn., the type of Calyptrcea, is different. 



The genus Sigapatella has the septum with a simple curved free margin, whereas 

 in Cnli/pti-ii'ii, starting from the centre or umbilical region, it juts out to a point and 

 then recedes. 



In the Cuming collection there are three very fine specimens (the largest 36 mm. 

 in diameter) labelled " rau/iiHt-iiofitfn, Sowb." These specimens passed through Gray's 

 hands when preparing his revision of the Calyptrceida,^ and without referring to 

 Sowerby's description, J and concluding that these shells were correctly named, he 

 naturally placed the species in the syuonomy of maculata, Q. and G. They certainly 

 are quite distinct from ( '. I'niiiniii-iiotiitii, said to have a central apex and to come from 

 the coast of Guinea. 



* Also quoted under this name by Martens and Hutton. It is the Calyptrsea calyptrseiformis of 

 Tryon, Man. Moll., vol. VIII, p. 122, and of Harris, Cat. Tertiary Moll. Australasia, p. 252. Lamarck's 

 ealyptrseformis is a different species. 



t Proc. Zool. Soc. 1867, p. 736. 



| Tankervillc Cat. Appendix, p. \ ii 



