EUDOXOC ill I 



Lateral area- .//<//// /"<//'"/'/// rilili1 and grooved, the- 



terior rib of each valve broad and crenulated, the other ribs mutual, 

 varviiiL r in number, usually split toward the outer ed^e of the shell. 

 ( 'entral areas sculptured with numeroifs strong but smaller ribleta, 

 \vhich near the dorsal ridge converge forward, but on the pleura 

 they diverge strongly. End valves having strong radiating ribs, 

 which split toward the periphery. Umbo of posterior valve prom- 

 inent. in front of the middle. 



Interior blue-green ; sutural plates broad; sinus rather deep and 

 square, finely toothed. Anterior valve having 23-26, central valves 

 2-3, posterior valve 18-20 slits; teeth stout, blunt, finely and 

 strongly pectinated. Eaves coarsely spon.iry. 



Girdle covered with coarse convex scales, larger toward the 

 periphery. Length 95, breadth 55 mill. 



Qalapag 



Chiton *nlrhi8 WOOD, Gen. Conch., p. 16, t. 3, f. 1. Sown., 

 Conch. Illustr., f. 12. REEVE, Conch. Icon., f. 15. R<nli<i tulcata 

 CPR., M\ 



This is one of the most strongly sculptured of all Chitons, and is 

 correspondingly easy to recognize. There are usually two slits in 

 each side insertion-plate, but the second valve occasionally h; 

 many as four. 



C. (Rnd*ia) ccerut'->-eit Slmttleworth, Diagn. n. Moll., no. 4, in 

 Bern. Mittheil. 1853, p. 65. Xo description of this species has been 

 published. It is said to be from California. Possibly founded on a 

 Ch. ciri/H/iitn*, q. V. 



Genus XIII. EXJDOXOCHITON Slmttleworth, 1853. 

 Eudoxochiton SHUTTLW., Bern. Mittheil. hsr>3, p. C>7, type A. 



unhil'i* ( lUAY. Aoiiithn/t/rnt'ii SCCt. * * f, GRAY, P. Z. S. 1*47, p. 



68, n",, ( Juildin;:. JA<//'</' rm sect, f, GI:AY, (iuide, p. 184, 1857. 

 fopk ura ADS. et a/., non SHI-TTI.W. 



Valves entirely exposed, smoothish, laekin-- eyes ; IDIKTO flat : the 

 sutural plates broad and connected across the sinus ; insertion-plate- 

 of all valves blunt, closely and deeply cleft, the median valves with 

 3 or 4, end valves with many >hort slits. Girdle leathery, setose. 

 (iills extendini: the entire length of tin- : 



The valves, when eroded, are seen under the len> t. be lnisely. 

 evenly and regularly punctured all over. The interior is white, and 



