1 111 tSCHNCH IIITON. 



-"v(; M ,. I',, Soc, N. II. ii. p. 144, July ls4(J : 



otia Conch, p. 5, 242; I . S, ExpL Exped. p. 316, t 419. 



iiir.iMM, P..lyplax. Cap Horn, p. 141. hchnochiton pruino- 

 CPB, .V>. p. 77. 103. 



Carpenter seems to consider this the same as mr'iblxtnm,,, and 

 ' iht* ; hut the specimen before me is too worn to enable me to 

 decide. 



1. 1:1 ,! LATU8 S,,werhy. PI. 21. fi--. ~t'\-~n . 



Shell ohlon.tr, rather smooth, olivaceous varied with white; front 

 valve, lateral areas and posterior valve concentrically unduh;t. Iv 

 wrinkled: central areas smooth, wrinkled at the margins. Length 

 Jo. breadth 10 mill. Girdle granose. (Soivb.} 



J'm, -tn ri-ti->r<> and Inner John* Jil., Centrnl Anit.i'i'-n, under 

 Btonefl :it hw water. 



rliltnn rtiiiiil.tttt* Sown., P. Z. S. 1832, p. 58; Concl.ol. Illu^tr. t. 

 !_'. 78, 1 I-. 144 ; Heechey's Voyage, Zool. p. \r>o, pi. 41, fig. 18. 

 REEVE, Conch. Icon. t. 19, f. 1 1 8; t. 20, f. 128, 13:}. /W/,,,W//7oy, 

 1-niintnfn* < 'i'i:., MS. 



( arjienter describes the interior and girdle from the type speci- 

 ii, .11. tlni-: Posterior and anterior valves having 9, central valves 

 1 slit; teeth solid ; eaves moderate ; sinus \\ide. Hat. Girdle closely 



imhricalcd with moderate sized solid scales, scarcely striated. 



It is very like drinlnln* but havini: stronger sculpture. It goes 

 through all the color variations of lonijicijnilxt. The >cah-s M-I-III to 

 he smooth, but here and there are slight striolations from the dried 

 skin. 



I. c.\ i i:\ri.ATUS Sowerhy. PI. 21, figs. 47, 48. 



Shell lonir and narrow, elevated, arched, the jugiun rounded. 

 ( iirdle smooth, broad, thin, with imbricatini: striated scales. Muero 

 central, elevated, the posterior slope >..nn what concave. Central 

 :n. -a- sculptured with very close parallel liruhe, which pa.-s into 

 wrinkles on the lateral area<. which ai'e -wolleii. Mud valve- con- 

 centrically wrinkled. Interior: posterior valve having I <>, --ntral 

 1, anterior valve '. >lit>; teeth huiir, sharp, thin ; eaves moderate, 

 not loi)L r , but well developel ; not spongy. Sinus broad, deep, 

 Miiooth. channelled. Length 17, breadth 7 mill.: divergence about 



L02 . ' 



Inn, /' /,'.//,,> I.*I,i ml. I 9 , ,-tl. 



