18 ACANTHOCHITES. 



small, transversely subovate, depressed- conical, with a nearly central 

 mucro; insertion-plate very large, laterally produced, with only two 

 notches behind. Interior of the valves bluish. Mantle very 

 minutely spinulose, bearing very conspicuous compact tufts of silky 

 spicules along the sides, not at all unlike in their fibrous texture that 

 of asbestos. Length 15 millim., width of the broadest central valve 

 5i (Smith.*) 



Flinder's Island, J3ass' Straits (Jos. Milligan) ; Port Molle, Queens- 

 land (Coppinger), Australia. 



Chiton (Acanthochiton) asbestoides Cpr. MS., SMITH, Zool. Coll. 

 H. M. S. 'Alert,' p. 83, t. 6, f. G (1884.) 



Numerous specimens are before me from the collection of the 

 Canada Geological Survey. The species is characterized by the 

 density of the narrow white asbestos-like tufts, well shown in the 

 figure. 



(3) Species of Japan, China, and the Sandivich Is. 



A. RUBROLINEATUS Lischke. PL 2, fig. 50. 



Shell oblong-ovate, convex, very minutely granose, dull flesh- 

 colored, here and there brown, having a wedge-shaped olive spot in 

 the middle of the valves, and painted with obliquely longitudinal red 

 lines. Sides of valves in large part covered by the girdle, the free 

 portion about as long as wide. Anterior valve regularly convex ; 

 posterior valve small, obtusely beaked ; the rest having a narrow 

 smooth median area, slightly excavated on each side. Girdle clothed 

 with minute, irregular spines, and 18 pores bearing dark bristles. 



Length 34, breadth 20 mill. (Lischke.) 



Nagasaki, Japan. 



Chiton rubro-lineaius LISCHKE, Malak. Blatt. xxi, p. 24 (June, 

 1873) ; Japonische Meeres-Conchylien, iii, p. 73, t. 5, f. 12 (1874.) 



Described from a single specimen. Compare A. achates. 



A. ACHATES Gould. 



Shell narrow, elliptical ; sooty, with a yellow streak on each side 

 Valves scale-shaped, beaked and carinated, at the apices smooth and 

 ebony colored, elsewhere scaly-granulated. Anterior valve semi- 

 oval ; posterior valve small, triangular, the mucro subterminal ; 

 interior glaucous. Ligament wide, provided with short, unequal 

 opines and bunches of spicules. 



