226 



BULLETIN Te, UNITED STATES NATIONAL MUSEUM. 



following characters: R=71mm.; r = 40 mm.; R = 1.75 r. Breadth of ray at base, 

 4<S mm. Height of longest abactinal spines, 6 mm. Disk very rigid, marginal plates 

 massive, the upper with proximally two or three spines as long as those of abactinal 

 plates, distally with one or two ; more of the inferomarginals have three spines, occa- 

 sionally four. Marginal spines of both series stand in line, forming a perpendicular 

 series of six in interradial arc (sometimes seven), then five, four, three, and finally 

 two. PediccllariiB numerous, the jaws slightly wider than high; actinal a trifle 

 higher than abactinal; none on marginal plates. Actinal intermediate plates 

 with short subcorneal spines forming a group of four or five (in addition to the 

 granules), or the}' may surround the pedicellaria when that is present. They are 

 equal to or only slightly higher than pedicellaria>. All granules skin-covered, 

 depressed or conical, but not denticulate or rugose as in i7. californica. Color in 

 life, a bright scarlet vermilion. 



Type-locality. — Departure Bay, British Columbia, 18 fathoms. 



Distribution. — From southern California to Alaska (Kadiak Island) in 27 to 

 121 fathoms. 



Specimens examined. — Eighteen specimens from the following stations: 

 Specimens of Hippasteria spinosa exaviined. 



Locality. 



Nature of bottom. 



2S72. 

 2874. 

 3059. 

 3000. 

 3080. 

 3443. 

 3300. 

 3664. 

 4233. 

 4243. 

 4292. 

 4293. 

 4552. 



on Cape Flattery, Washington. 



.do. 



on Siletz Bay, Oregon 



Off Tillamook Rock, Oregon [ 28 



Off Heccta Bank, Oregon j 93 



Straits of Fuca, Washington 100 



South of St. George Island, Bering Sea 121 



Near Santa Catalina Island, California i 80 



Near Yes Bay, Behm Canal, Alaska \ 30-15 



Kasaan Bay, Prince of Wales Island, .\laska. . . 42-47 



Shelikof Strait, near Kadiak Island, Alaska j GC 



Shelikof Strait 92 



Off Point Pinos, Monterey Bay, California 7J-B6 



gray sand 



rocks and shells.. 



mud 



brown raud 



green mud 



rocky 



fine gray sand 



....do 



soft gray mud 



green mud 



gray mud 



soft gray mud 



green mud, rocks 



U. S. Nat. Mus. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 AVbatToss, 1903. 



Do. 



Do. 



Albatross, 1904. 



HIPPASTERIA SPINOSA KURILENSIS, new subspecies. 

 PI. 43, tig. 2; pi. 121, fig. 1. 



Diagnosis. — Similar to H. spinosa, but with shorter rays, and relatively larger 

 pedicellarisc; abactinal granules t\'])ically pointed; margin massive, spinous; small 

 pincer-siiaped marginal pedicellaria;; adambulacral plates with two unequal com- 

 pressed furrow spines or only one; one prominent subambulacral spine shorter than 

 the longer furrow spine. R = 55 mm.; r = 32 mm.; R = 1.7 r. 



Description. — Abactinal surface spiny, the prominent spines being more coni- 

 cal and pointed than in tj'pical spinosa, where the spines are usually subcyhndrical 

 with a blunt or tnincate tip. Granules in a single series surrounding plates and 

 ending in an abrupt usually sharp point, instead of being rounded. Abactinal 

 pedicellaria^ numerous, large, as high or higher than broad, and wider at top tlian 

 at base; edge of jaw^ undulating or shghtly denticulate. Papulie numerous, all over 

 abactinal surface exce])t a very narrow interradial band. Superomarginals tumid, 



