U3TBB0IDEA 01 NOBIS PACIFI( UTO UWTACBNT WATBBB M-iiKlt > 



From the Okhotsk Sea and t! I Amuriand we have ■ quantity of larg< 



thiBBtarflal ery different from th< I by Brandt under the name ol 



this I have been able to determine through the kindness of the 81 Petersl i Museum. 



peelmens from the Amur were oollw ' lr ' :l 



\n the available specimens tfnoluding the one In aloohol bavi 

 dorsal and ventral side of which an d by a rather sharp border. The inadreporie plat 



m d easily seen, and is lot er the center than the ans enthearms. Hied 



tide is rather denselj beset with very si the position of which is without regulai 



... placed singlv, or two or three, sometimes four, together; along the ..,,.1 

 arms they oome together in a wavy line thai it clearly between the n 



which are scattered and weak. The spinular oovering n the disk than on - The 



individual spinuks are conical or oylindro-conical, covered with asperities, and terminating ii 

 two ,„■ three poii to Between the reticulations of the skeleton there are numerous papi 



bole dorsal ski irregularly placed 2-bladed p. 



the trabeculae of the skel In the interstices; on the spines themselv. I 



them Uong the lateral the arms the spines are densely placed ... a mull 



they also haw a peculiar Bat excavated and apicafiy blunted form. After mar- 



ginal spines there follow on the ventral side first a sone which is nearly with 

 un large specimens triple or quadruple) series of similar but somewhat longer - 

 ban- sone; and finally, near the tube feet, a dense doul in large specimi 



multiple) of slender, nearly cylindrical, somewhat Battened and excavated ambulacw 



2-bladed pedioellariae which are placed bet three ventral spi is i 



larger than those of the dorsal side; but besides these a third form is present that is much smaller 



occurring in great quantities on the ambulacra] 



mines and on the spinous sone between; they are eepeciallj present on the more oi 



part of t! pines which i- turned away from the ambulacra] groove; at the base of the ambul 



,.a,,illae there are furthermore tob, I quite a fen large pedieellariae. I 



before me has R r_><> mm . r 85 mm.; the width of the arm i am. 



The following is Doctor Lukten's diagnosis: 



. . , Stat ura ampla. Branchia quinque lata, depreaaa, ancipita, at 

 entrali separante. Bpinae dorsales disci densius, bracblorum spar 

 lae vel 2 1 juxtapositae, In media brachiorum parte saepe lineam continuam formanl 

 cae vel cylindroconlcae, aaperae, apioe blfidae vel trifidae. Corpus madreporiforme 



ce.itro propior. Areae poriferae multiporae Inter tral uls Jcarei. PedieeUaria 



rectae compreasae bldentes numeroaae supra totam superfldei raalem sparaae, ... splnia doraalibus 



nullae \d ...arg.nes lateral- braohiorum spinae i.r, n excavatae, obtuaae, pluri* natae, 



,,,.„.. ,,.„.. i„ pagina ventral] sonae longitudinales binae nudae, spinis fere deetltutae, cum 



spmarum rimflium sed paulo majorum duplici (in parte intima brachior 

 iruplici) alterant. Spinae ambulacra* fere, mediocriter compr 



i [oulatae aariem duplicem formanl vel multiplicem simul dorselibus oon- 



rormeeaed duplo majores lonas illas ....das maxima numero ornant, ad rjaeta ainnarum ambuue- 

 raUum quoque orebre conaplciuntur; minutl crudformea latua cava.., ; 



pedibus averaaum, spinarum ventralium, ambulacralium el marginalium fre.iuc.tant. 



Through the kindness of Dr. Th. Mortensen I bavi »fthe 



original lot from the At.nn- country, and have made direct comparisons * itfa numi 

 examples from Kamohatka and Alaska, as well as with specimens of A 

 r„U, -ton', (Bell) from several Localities in Japan. 



Tli, detailed description is based upon specimens from Btatiorj 3242, 11 lath 

 Bristol Bay, Bent,- Sea The ootype, figures of which are given, is closely similar to 

 these, with the exception of having slightlj smaller crossed pedioellariae. 



