' TOBOID] \ 01 NOBTB PACIFK am. .\m\. i.H 109 



The relationships "f hexaetia, in the narrow m • obscure 1 doubt if 



there is a homogeneous forma hexaetia. 'I int, rather pauciapini 



with one cir two Buperomarginal and rather few irregular, dorsolateral Bpin 

 behave like fortuitous variations, probablj of forma regularie. The Bmail specimen 



51, Gg. 1 1 in the type Berit its this and I have whal are apparently a few 



variants <>f regularie (San Juan bland) which resemble the' cotypec of forma 

 Thej appear to me to be something distinct from the paucispinous forma of 

 i-ounri. for instance. 



After camtachotica, the name hexaetis has priority for any 6-rayed 

 h i- unfortunate, therefore, that the typee are what thi I believe, how< 



that tlif relationship of this mho of specimens is with forms regularis and not at nil 

 with atgualia, despite the peculiar behavior of mi Both regularia and 



. among other items, luck the two or three enlarged lateral teeth <>f the terminal 

 lip of the ci • dicellariae, Buch as are characteristic ol - an 



nilitniii character but in the almost bopele of 6-rayed forma in i 



Sound region, everything hel] 



No adult specimens with alendei rays (forma hex* ctit have been tal en north of 

 Boundary Baj (between Washington and British Columbia) which is another curious 

 fact. As forma ngviaria is the prevalent variety of 



i Sound region, so also forma regularia and it- Less spin] counterpart, forms 



a, are the predominant types over the extensive coast between Boundary Bay 

 and the flhumagin Islands. Forma siderea and plena arc not so common, unless 

 possibly on more exposed outer Bhoree. 



The picture of the Bpeciee hexaetis should be based upon regularia and <i 

 (which arc really Bubformae of B variable forma) rather than upon form; 

 which is a rare, problematical variation. The fact that the type of t 

 what it is constitutes an unfortunate i pisode in the taxonomic hiatorj oi • ias. 



Forma HBXACT1S Stbl 



Plat i l., l/. ;>; flat,- 5(i. Figure 7; Flat 



Superomargina] Bpinlets two ■ >! on< , sporadically a group of time, infcroniargin- 

 als usually one. Rays slender, fairly long and attenuate distall] ; aba< tinal Bpinelets 

 cylindrical, tapered or slightly clavate, well spaced; a fairly regular carina] Berk 



• ■ spinelete or of groups of two or thn uonally four i dorsolateral 



apinelete usually one, Bometimes two to a plate proximally forming two irregular 



B8 and distall] one, or in extreme cases one onlj throughout. In this 

 there tire a few scattered spines at base of ray. t *n<- seriee of actinal Bpinelets extend- 



•uc-half to three-fourths length of ray I I pedicellariae with the la.st 



external tooth of terminal lip Bometimea slightly enlarged; straight pedicellariae 

 triangular ovate to slender ovate, or triangular lanceolate, R 1 1 nun., r 8 nun., 

 r='> r 



Stimpeon's types, three specimens, N J, 1 S.N M ; 



1 Sound, two specimen.-, Plate 60 Figure 7. Stanford collection. San .Juan 

 Islands, Wash., Stanford collection, one specimen; Boundary Hay, British Colun 

 Stanford collection, six Bpecimi 



