POLYPLACOPHORA. 103 



BIARMATA Rochebr. Shell ovate oblong, pale 

 rose. Anterior valve and posterior part of the posterior valve radi- 

 ally granate. Intermediate valves having the central areas covered 

 with straight beaded lines ; lateral areas longitudinally papillose all 

 over with papillae or obtuse conic granules. Marginal ligament 

 gray, with scattered whitish seta?. Length 24, breadth 14 mill. 

 (Rochebr. in Bull. Soc. Philom. 18Sl-'82. p. 195). 



King George Sound (Quoy & Gaimard). Rare. Paris Mus. 

 This seems to be a Chcetopleiira. 



LEPIDOPLEURUS FODIATUS Rochebr. Shell ovate elongated, fus- 

 cescent. Anterior valve minutely radially sulcate, the sulci inter- 

 rupted by concentric lines. Intermediate valves having the central 

 areas ornamented in front with minute undulating -sulci ; at the sides 

 with many pits (" lateraliter multicavatis "), the pits minute, ellip- 

 tical or rounded. Lateral areas longitudinally strongly sulcate and 

 sculptured with thick concentric ribs. Anterior part of the poste- 

 rior valve multicavate, posterior part radially sulcate. Marginal 

 ligament rather wide, brown, scaly; scales minute, lenticular, imbri- 

 cating. Length 35, width 18 mill. (Rochebr. in Bull. Soc. Philom. 

 1830-'S1, p. 120). 



Australia (Verreaux). Quite rare. Mus. Paris. 



SCIIIZOOHITON NYMPHA Rochebr. Shell elongated, very narrow, 

 obtuse in front and behind, rounded above; schistaceous cinnamon 

 color marked with white spots. Anterior valve smooth; posterior 

 elliptical, hastate ; intermediate valves having the lateral areas thick, 

 much raised, triangular. Marginal ligament narrow, schistaceous. 

 Length 32, width 11 mill. (Rochebr. in Bull. Soc. Philom. 1883- 

 '84, p. 36). 



Island of King (Peron & Lesueur). Very rare. Mus. Paris. 



CHITON TECTUM Blainv. Body oval, short, depressed, strongly 

 carinated in the middle ; girdle quite narrow, covered with small 

 very numerous and much crowded scales. Shell large, 8-valved, 

 the end valves ornamented with subtuberculate rays; lateral areas 

 of intermediate valves with 4 or 5 tuberculate rays; the central 

 areas with some coarse straight and flat channelling. Color gray- 

 whitish, with a series of pretty blue spots around the girdle. This 

 pretty species, of which one example exists in the Museum, probably 

 lives in the seas of New Holland. (Blainv. in Diet. Sc. Nat. xxxvi, 

 p. 539). 



