^. r 1. 



abruptly- • into ~ ^ ■..-,-, ^,,.\. ^ ostero-dorsal 



terio " , - . ^ . 



T ..„, - -1 



t e cbiinentrio sciilptiire ; escutcheon flattc , "" " b- a -•ea': 



ce.rl'ia, fee'bl;' rtriete^; exter; v.l ' ' romi- 



Gheou, terniinati ' ^ - . ■ • ,^.£ ^^^g escutcheon and limuJe , 



I'jvL" iinixn?'' across them as stT'^a.ti ''n Qr-fT-rsv^ 



"■"h; .^" i.,'.j ^uit^ L-.^^ ji.. •r.i'bo, lo.'^i.-, ■'.amellae 



intercalated "oet-veen the ' ry ones; hin~e 1, the right 



;ni 'die and -'ior cardinals h'fi'-'', the -^oe ' " -^svy and 



^,\'- "-■'■-- --•-:- j::c jb;-wj.-i^; ':'ac left middle o ■: ' ' " " larro; in- 

 ner nar.;rin of the valve mini^'t el;- cr emulated. 



DimenFiion^ .- length, 41- . 5 ''in.; alt., "^V i .; ' irn., 

 15 mm. 



^emarhs.- '" " ox this species . ' -tel;,' r^lB- 



'*"~"ishcr' ■^''-0'^ t eoncevitric 



sculT^tiTre of t"iVo oi- " '. ':ude. jl' ' '~ c more 



•elongated than yojmg ones, ilrrB-r;, 11-^ e 

 .;ore thiclcened and fe7.'er so ' '.cli.'-' 

 .lirgins. Cn the 1& ' " ells, ' 



'9 ridge, at v.: ..•imar;, 12a e ^ 



* 



.'isihle ■^ rihort •-■! i ;- -^ron the :'' " '__ ■; escutcheon, 



