264 APPENDIX. No. IX. 



Of these Arctic forms the test is depressed, the* spines of 

 the abactinal surface so small (merely miliaries) and so 

 widely spaced that the echinus has quite a naked appearance. 

 The pores are arranged in arcs of 5-6. The primary tubercles 

 are large, only one to each plate, and form prominent vertical 

 rows. The scrobicular areas are wide and bounded by an 

 irregular circlet of tubercles little larger than miliaries ; and 

 there are but few other tubercles in addition to these on the 

 plates above the ambitus. Extending from the actinostome 

 to the ambitus there is a moderate-sized secondary tubercle 

 on each side of the primary. 



All the specimens present the appearance of stunted 

 growth. 



The colour of the test is a varying shade of purplish 

 brown, and that of the spines greenish grey. 



On some examples the pedicellarise are remarkably nu- 

 merous, especially the large tridactyle form on the abactinal 

 surface. 



Grood series of specimens were obtained at several stations, 

 and in general facies present great constancy of character. 



The largest individual (from Cape Napoleon) measures 

 43 millims. in diameter, 21 millims. in height, and has 

 20 primary interambulacral tubercles. 



ASTEROIDEA. 



Asteracanthion gronlandicus, Steenstrup. 



Coll. Feiiden : Discovery Bay, 25 fms. ; Cape Frazer, 

 80 fms. ; Hayes Point, 25 fms. ; Franklin Pierce Bay, 

 15 fms. 



Coll. Hart : Franklin Pierce Bay, 1 31 5 fms., stony. 



This is a small starfish, with five moderately thick 

 arms. Proportion of disk-radius to arm-radius 1 : 4*5 or 5. 

 Ambulacral spines rather long and cylindrical, arranged (in 

 very irregular alternation) two and one to each plate. The 

 double spines radiate in opposite directions, the single ones 

 standing vertical to the floor of the furrow. Except in 



