SHALLOW- WATER STARFISHES 123 



in three radial rows, those in the median one largest. The two 

 marginal rows are regular and distinct, the spines being longer, 

 regularly spaced, one to each plate. Actinals mostly lacking. Adam- 

 bulacral spines slender, subdiplacanthid. Minor pedicellariae are 

 present in small clusters on most of the spines, but form complete 

 wreaths on the upper marginals. One of these young specimens was 

 labelled, by Dr. Dall, as white when living. 



Arctic Ocean, off Point Franklin, in thirteen and one-half 

 fathoms, sand (coll., Murdoch, Point Barrow Expedition), types 

 (three), No. 7625, U. S. National Museum; Arctic Ocean, ten 

 fathoms (Dr. W. H. Dall), No. 3622 (1669), U. S. National 

 Museum; Bering Straits (Robt. White), No. 16591; East Siberia, 

 Nos. 6031 and 16584 (young) (W. H. Dall). 



Several young specimens (Nos. 16584) from ten to fifteen fath- 

 oms, Plover Bay, Siberia, probably of this species, are nearly or quite 

 monacanthid. The larger have radii 5 mm. and 15 mm. The dorsal 

 spines are unequal, not crowded, the larger are short, capitate; all 

 are surrounded by pedicellariae in wreaths, unusually abundant for so 

 young specimens. Papulae are mostly isolated ; dermis thick. 



LEPTASTERIAS COEI Verrill, sp. nov. 

 Plate ix, figure i; plate xvn, figures i, 2 (types). 



A slender species, usually six-rayed. Disk small; rays long and 

 neatly rounded, tapering gradually. Radii, 5 mm. and 30 mm.; 

 ratio i : 6, sometimes less. 



The dorsal spinules form three pretty regular primary rows, with 

 many smaller ones scattered between irregularly, but not crowdedly, 

 and not clustered. Usually the spines stand singly, one to a plate; 

 the median radial ones are larger and form a pretty regular row. 

 All are cylindrical or slightly clavate, of moderate length, with 

 rounded tips, and are surrounded by small dense wreaths of minor 

 pedicellariae, which are nearly in contact in alcoholic specimens. 



The upper marginals are a trifle longer and form a regular row, 

 one to a plate. The lower marginals are rather longer, terete, 

 mostly one to a plate, but sometimes with a second smaller one 

 proximally. An imperfect row of somewhat smaller synactinal 

 spines proximally. The adambulacral spines are mostly in two 

 equal rows, but some of the plates bear only one spine ; these spines 

 are slender, terete, tapered, subacute, nearly as long as the lower 

 marginals, but much more slender ; they bear small groups of minor 



