- 4-65 - 



reduced., f re present on t e x^osterior carina and waj' pyen con- 

 tinue for a short distance on the escutcheon. On the ■'.'■ontrrJI ten 

 Tr.illinieters of adult shells seven or ei£"ht cone er trie vi'br. are 

 present. Tlie -^ - — Ive u.-. the follov/ing- diix-iiuioiKi: leng-th, 



25.5 nn. , al"-'- . , 22. .; ser/ ' ., ." mm* 



The charactf-^-'isti c ,' j'es of C_. £di_are its height, 



large Ir, "-"'' ^ ' ' he concentric riuti are oontinuoT"" 



strong radials that conspieuouslj crenulate the relatively fev/ 



concentric rihs. _;_. \1_ never ref ':he size o-^ the recent 



canoe Hat a (Linnaeus) ( 1) , which ra:.i^"es to liuc^snc -^ijl iti riore 



conve:-;, hi^" " h hi^hi/r, i^-i^e nuraerouB _ ore sharply chis- 



fl^. Syst. rat., - . " : , p. 1150, : ; -cove, Joneh. j-con., vol. 



11, pl.'lv', ■ - ^, 1S63. 



eled radials and oori-espondingly , more numer- 

 ous and shorter, hiit more deoidedlj' c - , centric rih^'. 



■^".:f;rar-" to ^upp;, ' : ■ ■ • ■ • ^^ foxm 



■vhich apparently v/e. j as 0. f;-'a.]r^-:;&na (2) .is 



distinct, heini^ lar , e ron , ' -ro^'er, lov.'er rarlialr?, 



(:}. Trans. .Irn. Philos. 3oc., -, "• ^ \ p. ^'\ 1^':'^. 



"er radial interr-:' , less Ir. '" concentric r'^ -^e 



linea- ' ir ven'-ral . ' ' th ^',, 



so::'.- vr,''-- -- -■•'>-^ lirie Cu-. ' ata 'ih'-'n "" ■."0 0'^-"-"rdi . 



