58 SUTER : RF.VISION OF NEW ZEALAND POLYPI.ACOPHORA. 



I have f^reat pleasure in associating with this species the name of its 

 discoverer, Mr. R. Murdoch, of Wanganui, who also kindly supplied the 

 drawing of the shell. 



Aeanthoehites (Loboplax) rublginosus, HuUon, sp. 

 PI. ix, figs. 12 — 17. 



Tonicia ruJii{/inOf<a, Hutton : Tians. N. Zeal. Inst., 1872, vol. iv, p. 180. 

 {Chiton ruhiyi'/iosus, Swains., in coll.) 



Cln'frm rulnginosuf^, Hutton: Journ. de Conch., 1878, vol. xxxvi, p. 39. 



Tanicia ruhiijinoi^a, Hutton: Man. N. Zeal. Moll., 1880, p. 114. 

 ,, ,, Pilsbry : Man. Conch, (i), 1893, vol. xv, p. 107. 



Acanfhochifes (Lohoj'Ia.r) rottfafus, Suter : Proc. Malac. Soc. Lond., 

 1897, vol. ii, p. 194, non Adams and Angas. 



ArcmfhocJiites ruhiijinoms, Hutton : Index Faunae Novae Zealandiae, 



1904, p. 86. 



Shell (fig. 12) oblong, small, subcarinate, the whole surface granular, 



mostly yellowish-pink, girdle with minute spines and sutural tufts. Anterior 



valve (fig. 13) with five ribs which are not very conspicuous, the whole 



surface granulated, the granules being largest, and sometimes unequal in 



shape, near the margin, and decreasing in size towards the apex of the valve, 



which is slightly sinuated. Intermediate valves (fig. 14) with the juguni 



sparsely longitudinally substriated ; the pleural tracts are granular; the 



lateral areas, but slightly raised and not very clearly separated from the 



pleural tracts, are similarly sculptured, the granules being again largest near 



the margin, round or o\<x\ in shape. The valves are subcarinate, beaked 



posteriorly. Posterior valve (figs. 15, 16) small, the mucro central, with a 



smooth triangular area in front, beyond which the whole surface is granular, 



the granules being comparatively large. Posterior slope concave, no signs 



of radiating ribs. Girdle (fig. 17) thick, fleshy, beset with microscopic 



white spicules; there are sutural tufts of white spicules, 7 on each side, and 



4 tufts in front of the head valve. Colour. — This is, as I pointed out in my 



former paper, variable, adult specimens showing mostly a pinkish colour, 



yellowish on the back, l)ut young shells sometimes have a most beautiful 



colour arrangement, the granules being white, pink, light brown and light 



blue. The jugal tract is in the intermediate and tail valves of a darker 



colour, mostly reddish-brown and assuming a triangular shape. The girdle 



is light fulvous with small patches and radiate bands of whitish-yellow. 



Interior wliitc, l)ut the centre of the vahes, head valve e\ce])lcd, is [link 



coloured ; the sinus is lather narrow and deep. The anterior valve with 5 



slits, corresponding wilh the ribs; intermediate valves with i slil on each 



side, strong teeth, and a stout valve callous; posteiiov vahe wilh a low, thick 



insertion ])late and 4 short slits. 



The figured specimen has: Length 17, breadth 13 millim. ; divergence 



