OBZTOV-RAD8IA, I'.'l 



_' on tin- <>thrr . potterior valve L8-19 ilita Teeth l>lmit, 



pertinat. narrow, SpOB 



(Jirdle eovrre.1 with sliiniii-, o.nvex, minutely ,-triated scales. 



n't in !><>, ( '/////. 



( liitnn tarnt GBAY, Spirii. 7<>ol., p. r>, t. 6, f. 22. Sown, in 

 M..11. Beechc}- Voj., p. HH, t. 11, f. 10; Conchol. Illustr., f. 2. 

 REEVE, Conch, Icon., 1. 1, f. 1 ; t. 21, f. 137. 



Kntirely different from the other species of Radxia in form jind 

 sculpture. The rihlets upon the central areas are very fine and 

 their interspaces shallow. Occasionally a specimen occurs having 

 some of the valves with a single slit one side. 



C. GOODALLII Broderip. PL 29, fig. 9 ; pi. 28, figs. 5-8. 



Shell very large, oval, moderately elevated, carinated, the side- 

 slopes nearly straight or rather convex. Surface nearly smooth. 

 Color blackish, olive-black or brown-black, generally showing an 

 obscure olive-green stripe on each side of the keel.' 



The lateral areas are a little raised, separated by an obtuse ridge 

 from the central areas, and in most specimens they are son/new In it. 

 t< miri'il IHJ roiii-i'utrlr mark* of groicth-arrest. There is no other >sru/jit- 

 ?'/> <>n i iflii'r c> ,it,;il nr lateral areas except an extremely minute and 

 even granulation over the whole surface. The umbo of the posterior 

 nifr,:* !* u ii ii.<uallij urn r f/ti' front margin. 



Interior white, each valve having a pair of posterior rays and a 

 central spot of brown. Sutural plates broad, sinus rather shallow 

 having about 8 teeth. Anterior valve having 25-26, central valves 

 2-3, posterior valve 26-28 slits ; teeth stout, blunt, deeply pectin- 

 ated ; eaves very spongy. 



Girdle covered with coarse flattened-convex scales. 



Length 110, breadth 70 mill. 



Qafapag 



Chiton i/onil,,//;; BROD., P. Z. S. 1832, p. 25. C. godallii SOWB., 

 Conch. 111., f. 34, 40. C. goodalli REEVE, Conch. Icon., f. 8. 



Jiuilsin t/onilit//! Cl-JI., -V-S'. 



This very large smooth species is quite unlike any other. 



C. SULCATUS Sowerby. PL 28, figs. 1, 2, 3, 4. 



Shell oval or oblong, moderately elevated, carinated, the side- 

 slopes nearly straight; of a n/j'i>rin olwe-blaehj or having the 

 lateral areas obscurely purple-black. 



