1-JS [8GHNOGHITOK, 



I 8INUDENTATU8 ( 'arpcnter, n. sp. Unfiyured. 



Shell oval, much elevated, reddish : juLTum acute-; nuicro median, 

 Iv elevated: entire surface minutely irranulose. Central 

 - lia\ mi: about 12 Bubparallel bare, Which pectinate the i'n.nt 

 marL r iu. their iutn u--ated : lateral areas havini: '5-4 irran- 



OSC radiatini: lira-, the anterior valve With 26, posterior valve 24 

 such Lim. Interior: anterior valve with 10, central 1 , posterior 

 valve l) slits; teeth acute; eaves conspicuous. stibspongy, crenulated 

 by the sculpture ; sinus wide, short, laminate with ahout ; teeth. 

 Girdle having moderate si/ed, wide, conspicuously striated, rather 

 iarly imhrioatiDg scales. Length 15, width ! mill. ; diver- 

 gence 100. (fyr.) 



Monterey, Cti/ii'u-uin. 



This shell has the color of /. mertensii, nciirl/ the sculpture <!' 

 /. f.cctumi.itn* and the normal scales of this rroup. Like /. /"/"- 

 . it htis the denticulate sinus of Chiton. (Cpr.) 



I. CLATHRATUS Reeve. PI. 26, figs. 31-'U. 



Shell oval or oldong, elevated, the l>ack carinated : >ide slopes 

 i\\\ : lateral areas and end valves radially grauulate-lirate, cen- 

 tral areas latticed. Color dingy yellow, clouded with black, or rarely 

 unicolored yellow or olivaceous. 



The lateral areas are raised and sculptured with about 5 rudia- 

 atin_r. clos-ly and conspicuously irranose rihlets. the posterior rib 

 wide or hilid : stroiiirly [icetinated alon<_ r the sutuial (d^e. Central 

 area- havini: longitudinal narrow bars parallel to the doi>al i 



d ly liars of almost e<|iial prominence vertical to them, 

 prodiieini: the effect of a grating. Mucro depn-s-ed. 



fnterior whitish, with olive or leaden ra\s under the uinboiie-. 

 Sinus flat, denticulate; anterior valve having 11 -I'-', central valves 

 I, posterior Valve 14-HJ >lits; teeth rather sharp, but not thin 



id; 



Girdle Compactly covered with very convex scales, which aie 

 ob-oletely striated. 

 ,jtli 27, br.-adth 17 mill. 



Length 84, breadth is mill. 



and Son to I.> Pout, / 



