from Chill 903 



***** LIGAMENTO MARGIN^ L^VIGATO. 



9. Chiton disjunctus, 



C. tests, oblongo-ovata, semipellucida, polite ; valvarum margi- 

 nibus anticis arcuatis, lateribus rotundatis ; ligamento marginali 

 lato, laevi, hyalino, coloribus variis marmorato, valvis inter- 

 posito. 



Tab. Supp. XVII. f. 5. 



Shell oblong-ovate ; semipellucid, reddish brown, with green 

 and straw coloured markings; inside white. Valves eight, 

 smooth, glossy, anterior margins of the dorsal valves arcuate^ and 

 not covered by the superior valve, except at the beaks, which gives 

 the valves a disjointed appearance ; posterior slopes a little de- 

 pressed. Border smooth, broad, hyaline, and when alive beauti- 

 fully marbled with vivid red, green, and blue colours; extending 

 up the back, and nearly separating the valves. 



Length two inches and ^ half, breadth one and a half. This 

 beautiful and rare shell was jfirst noticed by Mr. Cumings at Val- 

 paraiso, who found it in company with Chiton elegans, 



10. Chiton elegans, 



C. testa oblongo-ovatS, antice angustata, coloribus variis marmo- 

 rata; areis valvarum lateralibus minutissime granulosis; liga- 

 mento marginali lato, tenui, coloribus vividis marmorato. 



Tab. Supp. XVII. f. 6. 



Shell oblong ovate, anterior part narrower than the posterior, 

 semi-pellucid, msrbled, markings of various colours, generally dark 

 brown, reddish brown, yellow, and sometimes green. Valves 

 eight, beaked, the front valve with very fine excavated and raised 

 dots ; second valve longer than the others, and like them divided 

 into three compartments, the front with fine granulate longitudinal 

 striae; the two lateral depressed; with numerous fine irregular 

 granulations, and a few minute punctures ; a rather broad and 



