-I tfOBTB l-M iih \m> akimkni WAUBfl FISHBB 



it these formae breed fairly true when isolated I presume if it -imply a question 

 of terminology whether they !"■ called formae or apeciee The facl remains, however 

 that specimens occur al localities w here only extn me examples of dispor 



(but iihi nitida) have been found (Attu), and also where neithi nor extreme 



dispar have been collected (Atka and Shumagin [aland 



In tlic following description t he formae have been listed in the order of their 

 nblance to I hatica. It i- a taxonomic episode that the race must I 



a name which connotes a form morphologically so dissimilar to eamt 



Forma NITIDA. new form» 



Plata 12 i i'i. Rlgu i |gun I 



This corresponds to the typical form of cami The abactinal spinelets 



are much more numerous and do no! form evident longiseries with the exception of 

 the carinals which are larger than the dorsolaterals, more crowded, and occur in 

 groups, close together, so thai a carina] band of more crowded Bpinelets can be 

 differentiated. The marginal plates arc rather lii;_'h on side of raj •lust above them 

 is n typically narrow, regular channel the Bupramarginal containing a straight 



- of papulae. Between this channel and the edge "f the carina] band [A ><t :< nun 

 in fully grown specimens I the spinelets are thick I \ scattered, with a tend* ncj to form 

 short transverse lines, especially adjacent to the BuperomarginalB. A few of I 

 lines extend entirely across the dorsolateral area and seem in Bom< 

 tinued by the Buperomarginal combs 



Superomarginal spin.- three to five usually arranged in an arcuate vertical 

 series of three or f"ur proximally and three or two distally, with occasionally another 

 smaller spine on the «< I< >ns 1 lobe < >f the plate The spines are capitate slightly lai 



ibequal to the dorsals, and form a regular series of combs rather high on the side 

 uf the ray. 



Intermarginal channel narrow, [nferomarginal spines two (usually one on 

 four or five plates), much mure robust and about twice as long as the Buperomarginals 

 The end is usually swollen and turned upward slightly. Two serii - of actinal pi 

 one reaching 0.8 the length of R, the inner about 0.5 B in fully grown Bpecin 

 Spines, one to a plate, similar to the inferomarginal spines. The inner series of actinals 

 sometimes extends only a alight distance upon the ray. 



mbulacral spines similar to those of camtochatica. The first four to eighl 



plates have one spine; then a few may have two, followed bj two and one in no! 



mt\ regular alternation: then on outer part of ray the plates are monacanthid by 



uppn -Moti of the outer -pine of (liplaeanthiil plates. This results in alternate 



plates having only a furrow spine, which is Blender and more advanced into the 

 furmw than the clavate, subtruncate aubambulacral Bpine of the intervening, original 

 monacanthid plate- Three pairs of adoral adambulacral plates, as in 

 are in contact interradially bach of oral plates 



Mouth plates similar to tho-e of camigchatica Fn this forma the outer or smaller 

 of the two actinostomial or apical spine- i- m inning 



Papular areas small, with few papulae The ahaetinal ,|o not form regular 



long iccept adjacent to superomarginal plati 



