102 POLYPLACOPHORA. 



LEPIDOPLEURUS VARIEGATUS Adams & Angas. 



Shell oblong, convex ; whitish, maculated with green and irregu- 

 larly ornamented with brown, the spots closer at the sides. End 

 valves minutely divaricately striated, at the margins radiately cos- 

 tate and concentrically sulcated. Median valves subcar mated ; 

 dorsal [central] areas minutely divaricately striated ; lateral areas 

 scarcely elevated, with a few tubercles, radially ribbed, at the mar- 

 gins concentrically sulcated, the interstices minutely granulated. 

 Girdle pale brown, covered with close small scales. 



Length 18, breadth 8 mill. (Ad. & Aug.} 



Yorke's Peninsula, S. Australia, under stones at low water 

 (Angas). 



Lepidopleurus variegatus H. ADAMS & G. F. ANGAS, Proc. Zool. 

 Soc. Lond. 1864, p. 192. ANGAS, 1. c. 1865, p. 187. 



Generic characters unknown. Probably an Ischnochiton allied 

 to fruticosus, divergens, etc. 



CHITON coccus Menke. Shell elliptical, subdepressed, thin, pel- 

 lucid, ashey. Terminal valves with granose-nodulose rays, the ante- 

 rior 11, posterior 10; other valves with the median areas granulose, 

 marked with a brown spot in the middle, roseate posteriorly ; lateral 

 areas on each side furnished with a pair of strong radiating granose 

 ribs. Girdle very subtly granulose, ho'ary variegated with dark 

 spots. Length 4, breadth 2 lines. (Mice., in Zeitschr. f. Mai. 1844, 

 P . 62). 



North-west coast of New Holland, on Tridacna elongata. 



This may prove to be a Callwtochiton. 



GYMNOPLAX URVILLEI Rochebr. Shell ovate elongated, greenish. 

 Anterior valve and lateral areas of the intermediate valves granose, 

 the grains generally subconical. Central areas strongly transversely 

 sulcate, the sulci angulose. Posterior valve granulose. Marginal 

 ligament wide, gray, with a minutely reticulated clothing of rhombic 

 scales. Length 27, width 15 mill. (Rochebr. in Bull. Soc. Philom* 

 Paris, 1880-'81, p. 121). 



King George Sound [S.- W. Australia]. Rare. (Quoy & Gaim- 

 ard). Mus. Paris. 



Rochebrune thinks that the " Port du roi Georges " is in Poly- 

 nesia ! 



