\>ti:i:"M>k\ 01 I I'M mi and UWAi i-iu.i: 137 



orally free. This pair of plates is monacanthid and constitutes all tl f an 



adoral carina, the Beoond paii I><ihl- widely separated interradially. A youi 

 men from Kyska with K 6 mm. has (he firel pair of adambulacrals separated 

 interradially. 



Mouth plates rather narrow, each with two an inner slender, lilunt 



actinoatomiaJ aa long a~, or a little ^lu»rt«-r than 1 1 » « * median suture and a longer 

 Buboral similar to the Brs1 adambulacrals. This Bpine i rries ■ group of small 



lanceolate Btraight pedioellariae. 



--cil pedioellariae small (0.126 to 0.135 mm. long . with very broad terminal 

 denticulated li|>. (PI. 18, figs. ■". 6c Be.) The} form a thick mat on the expanded 

 convex terminal portions of t hi- oircnmspmal sheath-, upward of 8 t" 10 occurring 

 along the radius, from Bpine to periphery; ami they fori - - on the 



adambulacral Bpinee, as detailed above. 



Straight pedicellariae small, broadly lanceolate ate, with narrow 



jaws. The abactinal and lateral, scattered on the integument measure 0.25 to 0.37 

 mm. long (pi. 13, ti^rs. 6, 6a. 68 Actinal pedicellariae tin' lain late with the dps 



of jaws curved, sharp, ami crossed; similar smaller oik- occur in groups on the 

 furrow face of the adambulacrals and at base of inner or:, I Bpine lig. 6c). 



Madreporic body small, with feu coarse striae, mtuated near margin <>f 

 disk. 



Color in fresh alcohol whitish, or yellowish white. 



Tube feet in four seiie-. rather crowded; the pores are broadly lanceo 

 not \ ei v crowded. 



Gonads vers large in male; numerous lobulased divisions arias pinnately from 



the axis which extends sometimes nearly to the end of ray. the longer diviffl 



being on the mesial side. The gonads are attached to the body-wall just el 

 ami between Brat and Beoond inferomarginals (pi. 13, fig. I, g), the duct passing 

 downward to open on a papilla just exterior to the fourth adambulacral plate Tin 

 two papillae stand close together at the actinal end of the axillary channel. (PI. 

 13, fig 3, g.) 



Type. Cat No E 1504, I 8 N M. 



Typt loal, ty. —Station 3322, north coast of Unalaaka, Aleutian [alandi 

 45" V. 187° 23' 50" W., 3") fathoms. Mack sand, bottom temperature 42 1 I- . 

 three specunenfi 



/' ■■ I t ... p., i ing Sea, in the \ icinity of the Aleutian [elands; from Una 

 to K j to 50 fathoms depth at Kyska not records 



8peeitneru examined. In addition to the types, 12 specimi 



Station 3319, north coast of Unalaaka, 53 40' lt.7 30' W., 69 fathoms. 



black sand, bottom temperature 40 s F . six spec imens. 



Station 3321, vicinity type locality, 54 fathoms, dark mud. bottom temperature 

 41.5° F , three specimens. 



ion 1777. Petrel Bank, Bering Sea, of! Semisopot bnoi [aland, 52 to 43 fathoms, 

 fine gravel, one specimen 



Kyska bland Kyska Harbor . Aleutian [elands 177 W II Dall 



(189-1015; 188-1014; 173), two specimens. 



