AJB7TKBOID1 \ 01 NOBTB PACOTl AND ai>J\<i.\ 125 



ill believed, erroneously, thai this commonly includea 5-rayed 



examples. 11*- apparently employed ala#lcen*is in a curious waj the 6-rayed 



specimens while epichlora was used in a rather vague, comprehensive sense, f<>r nil 

 the varieties combined. The type of ala - from Unalaska (Dutch 1 1 «r 1 »• ^r < 



but he cites localities from Puget Sound t" tin- Aleutian [alands. I have never 



n .•! 5-rayed specimen and 1 believe Buch are extremely rare in the adult Bt 



since 1 have examined very many more s| imena than were available to Verrill. 



■ of bis supposed 5-rayed specimens are forma of young / 

 (for example, variety lubnodvh 



I lin\«' restricted the name ala*kensi& to that portion <>f tin- - of which 



Verrill 'a type is an example) which ranges from Attn [aland t" < ooka Inlet and 

 probably a little further south. The range of t!u~ ponds closely to that 



camtschatica diepar. 



Verrill mites that t in- Bpecies has a complete series of p* 

 bearing one large Bpine and that in large Bpecimens a Bhort second ron is found at 

 the base of the rays. This is net a fact. One means of distinguishin 

 its races and formae, from /.. eamttehatiea and allies is by the feeble development 

 of its actinal plates and .-pines, which never form a complete series and only in large 

 specimens reach the middle of the ray. A second rote ' The abet 



i real actinal area allow- the marginal plates to drop low on thi the ray. 



while in camtschatica, diepar, and allies they are rather high on the lateral face of ray. 



Form. ALASKBNSIS \ . m 



The following description i- of the type forma and its major variations 



/'■ oj forma alaekensie Spinel, -is numerous, irregularly arranged in 



surrounding the papular areas, which are unequal in size and without 

 longiserial alignment immediately above th< omarginal pli Spine- 



lets unequal, small l>ut robust, usually quite definitely Bub . or capitate with 



inded or truncal d extremity. Those along the carina] line are like 



be more closely placed, and either Bubequal to the others or a trifle larger D< 



lateral region, between tl annul and BuperomarginaJ plates, well tilled in with 



rhich are rather evenly graded, as to length, with the Buperomargu 

 There i< a distinct tendency in specimens from Unalaska and westward for the earinal 

 and a variable number of dorsolateral -pines to form groups of two, three, four, and 

 sometimes live, which, by reason of their slightly more prominent plates and Buperior 

 size, give an uneven surface to the abactinal mewhet as occurs, in a i 



exa jgerated way, in /.. pi 



Lower on Bide of ray than in L. can t well d ipramarg 



channel and a regular double cylindrical, often subcapitate, round-tipped or 



subtruncate, but mally slightly tapered. BuperomarginaJ -: 



little longer and thicker than the abactinals, or even vi Some! 



there :ire three spines, but never regularly. 



Below these is the regular intermarginal channel, followed by a double row oJ 

 inferomarginal spines longer and heavier than tb and in 



