66 SUTER : REVISION OF THE NEW ZEALAND POLYPLACOPHORA. 



Isehnoehiton (s. stt.) fulvus, n. sp. 

 PI. ix, figs. 5 — lo. 



Shell (fig. 5) small, elongated oval, with the sides subparallel, obtusely 

 angled, slopes flatly convex, fulvous. In size, outline and colour very much 

 like Lepulopleurux iii'[aiiiafu^. Reeve. Anterior valve (fig. 6) with a few 

 concentric ridges, minutely cjuincuncially punctate ; the anterior margin 

 white, the remainder uniformly fulvous. There is a slight posterior median 

 notch. Intermediate valves (fig 7) The whole surface minutely punctate 

 like the anterior valve, with a few concentric ridges, which are more strongly 

 developed on the lateral areas, The latter are distinctly separated from the 

 central area by a Ijroadly rounded edge, and there is no indication of radiate 

 riljlets. l\)sterior \alve (figs. 8, 9) concentricall\- ridged and (juincuncially 

 punctate like the other valves : mucro subcentral, [)ostcrior slope slightly 

 concave. Girdle (fi^. 10) covered with very small imbricating scales of 

 somewhat une(|ual size. Under the microscojie they are seen to be flatly 

 convex and deeply grooved, usually four grooves on a scale. The girdle is 

 mostly concentrically banded with white and fulvous, two rows of scales 

 to each band. Colour varies from light to dark lulvous, the dorsal and 

 anterior area; being always lighter coloured. The anterior margin of the 

 head valve, the anterior and lateral margins of the intermediate valves, and 

 the entire margin of the tail valve have a narrow white border. Interior 

 dirty white : sinus broad and deep, smooth. Anterior valve with 12 slits at 

 unequal distances ; intermediate valves with 1 slit on each side, posterior 

 tooth small : posterior valve with 12 slits, the teeth unequal in breadth. All 

 teeth are sharp and slightly grooved on the outer side. 



Length 12, breadth 7 millim. ; divergence 100". 



Hah. — Te Oneroa, Preservation Inlet and l>righton, Otago, South 

 Island of New Zealand. 



The only New Zealand Chiton which bears a close resemblance with 

 this species is, as already pointed out, L. imiuinatux, which however may at 

 once be distinguished by the longitudinally striated intermediate valves. 

 Pr. Torr informs me that this species also occurs in South .Xustralian 

 waters. 



PlaxiphOra grlauea, Ouoy and Gai.mrd, sp. 



Chiton (jiaucus, Q. and G. : Voy. tie I'Astrol., Zool, vol. iii, pag. 376. 

 PI. Ixxiv, figs. 7~ii (18,55). 



I have specimens, found alive, from the Chatham Islands, collected 

 and kindly sent to me by Mr. Pougere. They agree perfectly with 

 Tasmanian specimens It seems rather curious that such a lar^je shell 

 should not have been recorded before. 



