AS1 EB0ID1 \ »BTH PA< n :• • i-iih it 



well marked, the dorao atei typically singly 



1 1 nit aometimes in groups or lines of two, three, or even four) on the chiel nodes of the 

 reticular skeleton Id some of the vary large Bpe< i 



terete spinelets, .t than the abactinal straight pedicellariae, scatty 



over i !i«- abactinal Burfai •• In the specimens in which the spinelete are mon 

 grouped, there is rather lees uniformity in size some being of distinctly secondary 

 There is a broa i an I prettj definite supramarginal channel bounded abaotinatty 

 by a very irregular row of dorsal spines, whicl but nol always -tun. I cl 



together than "n the rest of the dorsolateral region. 



The Bupei i mal spines are similar in form to the abactinal spinee (folio* 

 the variation • and are generally Blightly smaller. Typically they atand 



one to a plate, i ther, forming a verj well-defined series, cha cally 



high on the side of the ithat the proximal half at least, and sometimes the whole 



ray is bordered, when viewed from above, by the inferonuuginals, or by the I 

 of actinal spine- This character is accent tated in small examples K iin mm. 

 in whicn the abactinal area is narrow, [nterradially the auperomargin 

 tends balfway to ter of the disk. Two or three spinee occur on the plat. 



the proximal half of ray in specimens from station (one eai 



There is a wide intermarginal channe 2 5 times length of inferomarginal 



spines i. [nferomarginal -pines similar to superomarginals, but a little li 



• nun. in „ sometimee one to a plate, sometimes two, or rather ir- 



regularis one and two proximally and one distally. The -.cries bends upward inter- 

 radially, and in bo imens is abactinal (or dorsolateral l in position. 



In large w there are six series of spiniferous and on< ofapine- 



actinal plates at the base of the ray. There i- considerable variation in the num- 

 ber of spine- per plate All plates may be monacanthid, In this case there are 

 eight regular, Bpaced, [ongiseries of spinee, of which two are mai bactinal 



in position 3 J2.) iter three or •'■ regularly 



or irregularly diplacanthid and the inner two or three monacanthid; or th net 



may be monacanthid, the next two irregularly diplacanthid. and the remaining tl 

 monacanthid 5 1281.) In a specimen from -tat ion 2842 a considerable num- 



ber of plate- are triplacanthid. In large specimens the sixth or inner sei tinal 



spinee extend- one-third R measured from center of disk The actinal -pines be- 

 come gradually er, sometimee heavier and clavate, in passing from the 

 outer toward the inner series The detail- of the actinal spin, 

 other Bpeciee 1 may be compressed and Bubtruncate, Bulcate, or tapei 

 blunt, or pointed The smallest specimen static with R 16 mn baa four 

 actinal plat ecimen from Kamchatka (station 4796) with 



■ 6 mm has but ' a of actinal plates W] ether this tant for ' 



Asiatic examples can oot be determined. 



The actinal channels are typically well mark n broad in some • 



that the row- of -pine- ire di-tinct and aeparated 



adambulaeral are triplacanthid and diplacanthid. In large examp 

 of the plates of the proximal half of the ray are triplacanthid then irregularly dipla- 

 canthid and trip i and finally on the distal third of the ra \ dipla- 

 canthid rary in different indi- 



