162 CHITON. 



/ 



Color, upper surface ground color of shell a greenish-grey, slightly 

 clouded with dark brown and black ; umbones lighter ; on each side 

 of the latter the ground is yellowish; whole surface sprinkled with 

 pale blue spots, which are bounded externally by a black line ; on 

 the central areas, the spots run in irregular, oblique, backwardly 

 diverging lines, and have a slight tendency to confluence, but on the 

 lateral areas and terminal valves the spots are irregularly scattered ; 

 under surface, pale sea-green, darker along the jugum, and with a 

 dark spot at the umbones of the terminal valves. 



Girdle : upper surface with large imbricate scales, of which the 

 exposed portion is smooth, the hidden portion being usually finely 

 striated longitudinally ; color, dark green, with a tendency to form 

 darker bands opposite the valves ; in the angles between the valves 

 a few of the scales are paler and yellowish in color; under surface 

 with long narrow oblong white scales arranged in transverse series. 



Gills extending along the whole length of the foot, about fifty-five 

 or sixty in number. 



Length 12'5, breadth 7'5 mill. 



The following Chitons also have blue spots : Chiton magnificus 

 Desh. and Chiton disjunctus Fremb. The latter is also from 

 Valparaiso, but it would be impossible to mistake these for Chiton 

 murrayi. Superficially, this species bears some resemblance to 

 Lepidopleurus lentiginosus Sow. (G. B. Sowerby, 1840, Charles- 

 worth's N. S. London's Mag. Nat. Hist., and Conch. Illust., 1841, 

 figs. 120, 121 ; Keeve, Conch. Icon., 1847, pi. xxiv, fig. 165,= Chiton 

 cyaneopunctatus KRAUSS, Die siidafrikanischen Moll., 1848, pi. 

 iii, fig. 2) ; but apart from the generic distinction, Sowerby's species 

 can be distinguished by the perfectly smooth shell, inconspicuous 

 lateral areas, paler color of the shell generally, and absence of the 

 external black border to the blue spots. I have given myself the 

 pleasure of dedicating this pretty and distinctive little Chiton to Mr. 

 John Murray of the Challenger Expedition. (Haddon.") 



Valparaiso, Chili, on the shore. 



Chiton murrayi HADDON, Challenger Polyplac., p. 21, t. 1, f. 7; 

 t. 3, f. 7a-7e. 



C. SUBFUSCUS Sowerby. PI. 38, figs. 19, 20, 21, 22. 



Shell oblong-oval, elevated, carinated, the side-slopes nearly 

 straight. Surface rather shining. Color dark olive-brown, or olive- 



