ASTEROIDEA OF NORTH PACIFIC AND ADJACENT WATERS — FISHER. 



183 



are rather small. Gonads in a single tuft on either side of interradial septum, 

 which is membranous. Anus present. Intestinal coccum iarj^e with ton or eleven 

 radiating, slightly branched divisions. Tube feet with well-developed suckmg 

 disks ; no deposits. 



Variations. — The principal variations have been noticed in the above description. 

 To recapitulate, tlicy concern chiefly the following characters. Rays, which vary 

 m breadth and length, being a little shorter m Japanese specimens, but vary also 

 in Alaskan examples. Paxillje: more compact in some individuals, with a sUght 

 difference in wilth of paxillar area on rays, due to the variable width of supero- 

 marginals. Superomarginals: variable in width and number, being apparently 

 slightly broader in Japanese specimens (but occasional examples, stations .322.5 

 and 3258, from Alaska, also with broad plates) ; in number varyuig from thirty- 

 three (Japanese) to forty-tlu-ee (station 325S) in examples of same size (Iv, 70 mm.), 

 the Japanese specimens consequently having longer plates. Inferomarginals: varia- 

 ble m width as superomarginals; covering either very compact and polygonal or 

 more open and squamiform. Variations in adarabulacral armature, mouth plates 

 ami actinal mtermediate plates, sufficiently treated above. 



Young. — The type described by Sladen is a small specimen. The smallest 

 specimen in the collection from station 4792 has the following dimensions: R, 19 

 mm.; r, 8 mm. Superomarginals, twenty. The actinal interradial areas are small 

 and lack enlarged spmules, as do the adambulacral plates on the proximal half of R. 

 Termmal plate large, subglobose; proximal superomarginals with small bare spot; 

 spinules of inferomarginals only a trifle enlarged bcj'oml granules. 



Type-locality. — " Christiansund " (Norway), 30 fatlioms. 



Distribution. — Off the eastern coast of the United States and Canada (I at. 

 44° 26' to 37° 59' N.) in 85 to 1,608 fathoms [VerrUl, 1899]; oflF Norway (Chris- 

 tiania Fjord to Fmmark, lat. 58° to 72° N.) eastward to the Murman coast; west- 

 ward to the Shetland Islands, and Ireland [Ludwig, 1900]; Beruig Sea (Bering 

 Island; Pribilof Islands) extending at least as far as Kadiak Island in the eastern 

 north Pacific, and south along the coast of Asia to the Sea of Japan, 70 to 351 

 fathoms. 



Specimens examined. — Twenty-seven, from the following stations: 



Specimens of Pseudarchasler parelii examined. 



3225. 

 3257. 

 3258. 

 3330. 

 3487. 

 3490. 

 3548. 

 3606. 

 4287. 

 4291. 

 4292. 

 4784. 

 4792. 

 48SS. 



Near Unlmak Island, Aleutians. 



North of Unalaska Island,. \leutians 

 Bering Sea, west of Pribilof Islands . 



West of Pribilof Islands 



North of Unlmak Island 



Bering Sea, north of I'nalaska Island 



Uyak Bay, Kadlok Island 



Shellkof strait, Alaska 



.do. 



Near Attn Island, Aleutians. 



Near Bering Island 



Matsusblma, Sea of Japan . . . 



60-07 

 05-»S 

 109-94 



Nature of bottom. 



black sand 



gray sand, gravel 



black sand, gravel 



mud 



green mud, One sand. . 



do 



black sand 



green mud, One sand . . , 



gray mud 



blue mud. sand, gravel. 



blue mud, fine sand 



coarse pebbles 



pebbles 



green mud 



U. S. Nat. Uus. 



Do. 

 AUxitroas, 1903. 



AlbttlrOMS, 1900. 

 Do. 

 Do. 



