|| i M vi i ii ; 



I m ul lat. v Kl ill t& ". ■ ul. la' ' "'"I •'••'• "; In' 



l-tlllll 



\ - I 111 |ll !• III- 



\ parvuiu inni lunguiii -11111111 luiuiii iiicdiu profuudc cotuitrictum niiiu mox valde 



subn ■ tangulan i; apici m \' ratta 

 mgulifl -ni» ri"i il'H- .1 infcrioribua aculuos parvoa Bingulos vel 



Lpii ilnis. m<mi Iuti-. ii-iii i- »tia in- -Ii" utroquc lati n 



lim,,.. mia*, apiee ii-uii' .ii. i . hii. iil.ii- ..liiu-.i. 



\ \ .i) litli ii tuburculu vel elevationc ccntrali minore tantuiu i" 



lundatu ii ilcfi • - api< dia iiicdiani, n X, Hmithii Bcmicellulia fen rcctaugularibus 



-IIJm : all-. 



ul. -j i iti u; lat -. in ul. .I .'< "-. uraaB. 17 18 .»: l"n,u. acuL l "• 

 240, 262). 

 Thia 1'liiui i- iuti riucdiatc betwecii A. Stnitliii atid A. dilatalum, l>m n< ■! bavitig 

 tu. i w i 1 1 1 iin\ uiore uonnecting fortas, I liavu raised tlii- form to the rank "I " Bpecies, 

 ut Ii ii-t ni tln present. 



\. -Mniihii \ . Sat lli-i. Rev. tab. 13, fig. 10—12. 



rlaklls nov. var. Tab. I. fig. 27 -"■'. 



icrlltiliv baai subrcctu.' conatrictione cclluht! minus cuneata, apice truncataj \'l 

 Icviti - : :i vertice e1 ;i baai visse : i j > i < • i 1 » u ^ truncatis angulis 1 — 2-aculeatis, intcrduw 



mull" iuti t tiugulos ornatis, inedio utroque latcrc tuinore rotundato-truncato vel aculeato 

 l>r.iilit;c: a latcrc vissa utrinque tumöre rotundato vel biaculcolato prseditss. Aculei |>;u-\i 

 ad I " longi. 



I •_ sin. inul. 24- 32 f*\ lat. 22- 28 u; lat isthm. circ. 8 /<: crass. 16 — 18 ": 

 long. in ul. • . I ". 



Artbur Pass (17); Tcremakau e1 Arahura (22). 



I have bere combined "_' somewhal different forms l>"tli differing from the Irish fonn 



in i- inui-li as tln \ maj develop 2 Bpines, where the latter bas only one. The projection 



in the middle ..t the -i iiii.ill of one of the New Zcaland forms (fig. 27) is withoul Bpinesi 



ilmi "t the "tln r form bears 2 (fig. 28). In the fronl view the ends of the semicell <>' 



the former are crowned bj ■". spines; those "t the latter only l>\ 2. This variety is very 



t" A. /,' ■■'•• teonianum, which M. Vrchbh bas but briefly described in Quart Journ. 



M. S -- ».114. Ili- more detailed description, there promised, \m- nol yet appeared 



in print Specimens "t A. Rob. bave been publishcd in Wittb. et Nobdst. Alg. i -. N:o 



- ms chiefl) t<> differ from X. Smit/,;; :>' variabile l>\ n greater number <>!' mi- 



- in the iniddle "t it- Bemicells, as likewise m-ar the margin, and n<>t in the 



margin itself. The ends "t the scmicells are in the end view of X. Smithii rf variabttt 



inur.- truucate nnd not bo rounded as those "t <■ and ■>{' X. Robinsonianum. 



nu lateribus seinicellolarum paullulo retusis. Tab. I. fig. i".'. 



