118 I-- IINMI mi. P\. . 



front; lateral arras elevated, sculptured with 6 radiating sulri : 

 central areas imbricatelj sulrate. (iirdle narrow, handed with 

 olivaceous, covered witli minute scales. 



Length l:J. breadth ! mill. (G7d.) 



Interior: terminal valves with about 14, central valve.- 1 slit; 

 teeth very acute, but a little serrated at the edge. Haves large; 

 sinus narrow, vaulted, scarcely laminate. Girdle irregularly 

 imbricated with transverse, solid, neatly smooth scales. (Cpr.) 



China Sea, Lot. 24* N. 



Chiton (Lepidopleura) !f/n'<ln8 GLD., Proc. Bost. Soc. >". 11. vii, p. 

 H>4 ; Otia, p. 118. Ischnochiton /c/inlus CPR., MS. 



The girdle scales are those of Lepidopletirus, [Lepidozona] 

 except that the imbrication is irregular. The species is remarkable 

 for the narrow-, arched sinus; and for the slight serration of the 

 insertion plates which are yet normally sharp and protected with 

 broad eaves. I have not been able to re-examine the type since I 

 matured a plan of arrangement for the sections of the genus. (Q?r.) 



I. PBTALOIDES Gould. PI. 23, figs. 92, 93. 



Shell small, delicate, elliptical, roundly arched, very slightly car- 

 inated, the valves not beaked, of a pale lemon-yellow ground color, 

 reticulated along the centre, with delicate, angulated, pale-violet 

 line-: these areas are also rugosely lineate-punctate longitu- 

 dinally, especially toward the margin ; lateral areas very prominent, 

 riiiro-rly granulate, and with about four, fine radiating stria? ; pos- 

 terior valve acutely umbonated and crossed by an acute, tran- 

 rib. Margin cream-colored, very finely granulate-imbi ; 



(Old.) 



Interior : posterior valve having 9, central 1, ant. v. 9 slits ; teeth 

 acute; eaves acute, hardly spongy ; sinus very widt . short, smooth. 

 Girdle imbricated \\ith flat, scarcely striated scales. (Cj>r.) 



Length 12i, breadth 10 mill. 



Kan 1 1 1 <in>l OaJnt^ SainhrirJt /.. 



C. /t /"''/'> <1 i.i.. I'r'c. liost. Soc. N. 11. ii. p. 144, July. lM'i ; 

 t . >. Kxpl. Kxped., Moll. SI... p. ::_' : Otia Concho)., p. (i ; 



C. (Luciu) pdu/n!if>:< ( \\.\t., ( Mia p. L' 4 '_'. J.n/Ji t f ru.< /xf.i/n!,/, .< 1^1 . 



Amer. Journ. of Conch, vii, ]. 194. Itchnochiton iinln't<l, .< Cv\\. 

 MS. 



The scales an- rather lar.L'r for the >i/c of the shell, but thin, 

 sprciiin-n- have sometimes an af>prarancr of minntr >triula- 



