\-'i l 1. 1. li'. \ Q] NOB I ii PAI UK \M> ■■ - 1 I8H1 M 1 



about ti:i<> thumb-breadtha in length i <■ . surface cl nil gr< 



• red with crowded white Bpinee, of which the Bummit is capitate, arranged in a 



ulate pattern Lower Burface pale Been color 



Verril) applied epichlora to the commoner 6-rayed /■ I the 



inter tidal eone of 1 1 1 « • southern Alaskan coasl (two Bpc ies 1 hav< seen bul 

 5-rayed > sample «'f these Bpe iea among Beveral hundred examined; and if we ad 

 an inch as a thumb breadth, the size given !>y Brandt does not conform tc. the 

 or proportions of the Lepi The proportions, inequality of rays, their Blight ly 



depressed form, and color ol Brandt's Bpei ee fairly well with amall exam| 



of I which 1 collected al Departure Bay, British Columbia However, in 



order to avoid n :".' ia1 deal of confusion which would follow a shift of the nan • 



had best !><• consigned to the limbo of disused n It is 



certainly misapplied in connection with any 6-rayed LtptasU 



The variations are so numerous and confusing in / a«U 

 attempl will be made to describe the Bpecies Rathej the chief formae will be 

 anarj well us the materia] permits. 



K..tn.« TIlliNl III I II Minip-.n 



IMat. 6a; Plat< 



ire I 



i - ■ M7. 



p 98; 181 I p in.' 



\ l;: l I . I'M), p 1 - I 

 \ SKILL, I'.'l ; 



\ i ui 1. 1., 1914, p 163. 



This is the forma to which the type of the Bpecies belongs Plate 80 Figure I. 

 i- an extreme having widely Bpaced and rather slender major nd unusually 



few minor Bpinelets I-"ii^i i r<- _' i- a Btouter-rayed Bpecimen having robusl subtrun 

 tubercular major Bpines. The minor spine- are in lines here and there outlining 

 poorly defined areas Plato ire 1. is a slenderer-rayed specimen in which 



the minor spines have increased in number and it i- intermediate with forma 

 having both coarse and slender spines, as Plate 62 When full grown, fat-rayed 

 npecimons of I have the spines rather widely spaced, as in Plate 61, Figure 1 . 



This is Verrill's variety rud § simply a growth 



Tlie type forma is extn □ elj \ ariable and it is practically impossible to find two 

 specimens alike Tl • slender and stout rayed examples The major Bp 



are well Bpaced, or they may be clustered in twos unci three-, or may form 

 nodular prominences. The major Bpines are relatively -lender oi ry thick, 



truncate, and manj times the diameter of the minor Bpinulee The latter are 

 and irregularly scattered between the major Bpines; or they maj 



y defined reticulum. 



The salient feature of this forma i- the wide disparity in - en the i 



and minor dorsal -pine- which do not form a meshwork design Stimpson - 



n number, shorter but much thlcki 

 Battened I 



