ASTEKOEDBA mk noktii PACIFK and aJXIAl rTSHBH 1 "»7 



SUphamasUritu lubes Verrill from Albatross station 27 5 fathoms, «.tf the 



east coast of South America (lal 36 17 3.,loi •'■ aot e,8t*phai U 



lint prohahly an All".ti t !. 



BTXPHANASTERIAS ULB1 U stim,«wn, 



Plate 70, Figures 1-5; Plate 71, Figures 1, la-l tf ; Plati 



I 'teracanlhion albulus SnifFSON, Invert. Grand Manati, 1868, |). 14, pi. 1, tig 5 

 A$leracanthion problemu Stobmstbup, Videnak. Medd., 1864, |> 140 I. rsi .. G 



Echinodermata, is;,?, p. 30; Videnak. Medd., 1871, p 

 Asterias albula SnupsoN, Proo, Acad Nat, 8cl , Philadelphia (1803 . 1864, p 142 

 Stichaster albulus VlBBTLL, Proc. Bostmi Boo. Mat. 1 1 p. 351 (var ?. 



p. 351). — LuDwni, Arktiaehe Seesterne, Fauna Arctic* i. 1900, p it 



Voh Hofsten, Echinodermen dee Biafjorda, 1016, p. ">ti, fig. 10 ribul 



Stephanaslerias albula VCBRILL, Hull t., Vol. 1, 1871, p 



fishes, 191 1, p. NT-. 



Description. — The small, close-set groups of dorsolateral spinelets, upward of 

 five to ii plate, tend to form close transverse rows, extending from the different! 

 carina! Beries to the inferomarginals which are low oo side <>i' ray. < an n»il p] 

 somewhat larger than the dorsolaterals, more strongly imbricated and with five "r six 

 divaricate spinelets. In a Large specimen abactinal spinelets are 0.45 to 0.55 nun 

 long and are tipped with usually three to six sharp thornlets In alcocholic sped] 

 the Bpinelets are skin-covered, papilliform and nol easj to differentiate from the 

 crossed pedicellariae which arc scattered among them, Papulae 3mall, single or few 

 in an area. Two irregular longiseries of areas nearest carinals are aboul the sia 

 the plates but two other series on dorsolateral region of raj I the outer one, -upr.. mar- 

 ginal) are usually considerably larger than the surrounding plat 



Superomarginal plates four lobed, closely imbricated, the descending lobe Ion 

 Each hears a tran-\ erse (vertical I comb of four or three spinelets similar to the abac- 

 tinal hut sometimes a shade larger, [nferomarginal plates, on ventrolateral border 



of ray hear an oblique COmb of litre or four spinelets of which the lower two or 



sometimes three), arc considerably longer and often much thicker than the supero- 

 marginals. In old specimens some of them may be spatulate, or clavate and slightly 

 curved. Usually, however, the] are all slender. They are aboul 1 to l 25 nun !• 



Adambulacral plates short, so thai the combs of three spines per plate rarely 

 four i, arc close together and form a cheveux-de-frise along the furrow margin. Pli 

 of the outer attenuate portion of the ray frequently carry two Bpinelets The Bpinelets 

 are subequal to the inferomarginals and like them are sometimes thickened in old 

 specimens. The middle one is often slightly to decided!} compn ssed and broadened 

 tou ard the tip 



Each mouth plate carries on the narrow suboral four tap< 



Bpinelets Bimilar to the succeeding adambulacral Bpinelets (of which there maj 

 only two on the firsl two or three narrowed adambulacrals) At the the 



Innermost oral spine there is a cluster of small lanceolate straight pedicellariae similar 

 to those which fringe the furrow margin) One to several large unguicu 

 pedicellariae stand at the surface of the plate 



■ 

 160 30 11 



