ik;>i)n-ki".():<.i:k sria'iKs or .\(.auic(.i kim 



101 



?/7/;///V/'// II;ill : and A. iroi-//jr,u II ill, (.-cur at Iv-oxuk. A. 

 H)iii'r.>'r(iitiis ai'.d A . voiili(ii/' •AY.\):\vv\\\]y well disliiiLi-uis!ic(l . 

 The latti'r appaiv utl y t!u! ruliuiiiitioii of l!iis o-.-neric form 

 which h^'coni' s (xliiict at (!u' clos'i oj' this p rio;]. 



.1. (nii(')-ic(iiins j)!-. s iits inanv (lill'. rtMiccs of stnictiiri?. Sp '- 

 cie.s sadly in m-t d of ivnis'on. I^'tcins In fore us ha\e \<v\ 

 shallow coiicax ity not "deeply concave"" as clt tia'^'d \)\ 

 \\'achsnmth and Spriim-er;* allied to ^1. irhilJ'whU '\\\ haviu'j: 

 the secondary radial of one of the posterior r.iys une(pi:dly 

 (piailranirular, while the othei' h:isi;s upps'r a'-utc anirle ti'un- 

 cated hy on;- of the inlc^-rradi;'.! i)lates. Arms reuularly 

 tweh'e in numhi-r. Found !n tlu- lower criuoid Ik'cIs. 



Si)eeimens of tliis suhcxi-avate form in c(*llecti(>ns of \. K. 

 Burl^et, L. A. Cox and tlie writ(>i-. 



The sixteen armed form-- of A. (niu^yicawi.'^ [)re.sent persist- 

 vnt charaeters tliat may he sutH -ient to entitle tliem to more 

 th.an varietal distin -t ion. A rran/ins- nt of arms ir nerally 

 acc()rdinL;- to comnion ])]an. l>as;d (onca\i1y exceptionally 

 <l^ep, invtjlvinii: lli • w'lol • s ri 's of radials uj) to and par- 

 tially iu'ludin;,'- tli' setoiulary radials. Ncaidy all exami)h's 

 Avilh sixte n arms d riv d from ih • low. r crinoicJ h (]-. asso- 

 (•iati'd Willi t'l? sul)''Xcavat J form ahovo uolicid. 



* RcvJi!oii P.Ua:oi.r;i«>!<Jea, Part II, 



