SUTER : ON NEW ZEALAND PATELLTD^. "O-i 



This small limpet shows, like most of our species, a very great 

 variability with regard to the colour pattern, and in this respect it 

 stands nearest to II. tramosericus. The variety without black rays, of 

 flesh colour, occurs on Raoul and Curtis Islands. The principal ribs 

 are very often formed by two or three smaller riblets grouping together. 



Genus NACELLA, Schumacher, 1817. 



Nacella, Schumacher: Essai d'un nouv. Syst. (1817), p. 179 (type, 

 P. mytilina, Helb.). 

 „ Pilsbry : Man. Conch. (1), vol. xiii, pp. 79, 114. 



Sect. Patinella, Dall, 1871. 



Patinella, DviW : Amer. Journ. Conch., vol. vi (1871), p. 272 (type, 

 P. Magellanica^ Gm.). 

 „ Pilsbry: Man. Conch. (1), vol. xiii, pp. 80, 116. 



9. Nacella (Patinella) illuminata (Gould). 



Patella illuminata, Gould : Proc. Bost. Soc. Nat. Hist., vol. ii (1846), 

 p. 149. 



,, Terro7'is^ Filhol : Corapt. Rend., vol. xci (1880); Mission de 

 I'ile Campbell, p. 529 (1885). 

 Helcioniscus illuminatus, Pilsbry: Man. Conch. (1), vol. xiii, p. 142, 

 pi. Ixx, figs. 40-42. 



The dentition was described and figured by Hutton in Trans. New 

 Zeal. Inst., vol. xv, p. 128, pi. xvi, fig. C. I examined the radula of 

 a specimen from Macquarie Island and found it exactly as figured by 

 Captain Hutton. The foot of the animal has on its sides a scalloped 

 frill, interrupted in front ; the branchial cordon is complete, not 

 interrupted in front, and the branchial papillae are elongated conical, 

 transversely foliated ; larger black lamellae are placed at regular 

 intervals, leaving two to three white papillae between them, and have 

 their base of insertion higher up on the inner side of the mantle. 



Sah. — Auckland, Campbell, and Macquarie Islands. 



10. Nacella (Patinella) Fuegiensis (Reeve). 



Patella Fuegiensis, Reeve : Conch. Icon., vol. viii (1855), fig. 73. 



,, Fuegiensis, Filhol : Mission de File Campbell, p. 529. 



,, Fuegiensis, Pilsbry: Man. Conch. (1), vol. xiii, p. , 



pi. , figs. 



Shell oval, rather thin, semitransparent, rather compressly raised, 

 apex rounded, inclined anteriorly, radiately ridged, ridges thin, 

 numerous, densely crossed with concentric striae ; greenish, more or 

 less stained and blotched with chestnut brown, apex bronze, interior 

 iridescent bronze, radiately grooved, grooves sometimes partially 

 obsolete (Reeve). 



Hah. — Campbell and Macquane Islands ; Tierra del Fuego, 

 Falkland Is. ; Kerguelen Island (Smith). 



A delicate subpellucid bronzed species, elegantly many-ridged, of 

 a pale greenish texture, partially, and sometimes almost entirely, 

 stained and blotched with reddish chestnut (Reeve). 



VOL. VI. — SF.rTEMHER, 190"). 25 



