LABRADOR ASTEROIDEA — GRAINGER 39 



Pter aster pulvillus M. Sars 



Pteraster pulvillus M. Sars, 1861, p. 62, pis. 6 (figs. 4-18), 7, 8. 



Collected at 1 station; 81 m.; stone; 1950: BLD15 (1 specimen). 



The single individual collected was 44 mm. in diameter, with R:r 

 of 1.7:1. It occurred (fig. 1) in Hamilton Inlet, at 0.7° C. and 327oo 

 (fig. 2). This too is an almost circumpolar species, extending from 

 Arctic to Boreal Waters. 



Henricia eschrichti eschrichti (Miiller and Troschel) 



Figure 3 



Eschinasier eschrichtu Miiller and Troschel, 1842, p. 25. 



Henricia eschrichti eschrichti (Mttller and Troschel). — Heding, 1935, p. 26, figs. 8, 

 12(2), 13(7, 8, 12-14). 



Collected at 14 stations; 18 to 146 m.; mud, rock, rubble; 1949: 

 BD5 (2 specimens), BD30 (1), Red Bay (2), Davis Inlet (1); 1950: 

 BLD15 (1); 1951: BLDl, 11,34 (1), BLD4 (1), BLD5 (1), BLD7 (1), 

 BLD8 (1), BLD40 (1); 1952: I-2a, b (2), 1-4 (1), 1-16 (2). 



Several of these 18 specimens are placed with some doubt in the 

 form eschrichti. Inconsistencies among the deviating forms and the 

 suggestion of gradations between typical eschrichti and the most 

 variable specimens, however, prompt inclusion of all within the 

 eschrichti group. The majority fulfill requirements of the form accord- 

 ing to the criteria of Heding (1935) and Djakonov (1950) and agree 

 well with specimens from farther north in Arctic-Subarctic Canada 

 (Grainger, 1955). One individual, from BLD4 (1951), taken by 

 itself, however, shows several marked differences from typical es- 

 chrichti. The diameter is 60 mm., the E.:r 4.3:1. Dorsal paxillae are 

 more widely separated than in the typical form, often by spaces equal 

 to their width or larger. A few paxillae have up to 12 to 14 spines; 

 others have as few as 3. Many have 4 to 6. The madreporite shows 

 conspicuous rows of spines. Most important are the adambulacral 

 spines, generally in only a single row, or sometimes in irregular zigzag 

 series suggesting 2 rows, with always a single spine larger than the 

 others at the edge of the groove (figs. 3c,oJ). These spines usually 

 number 5 or 6 per plate. Marginal paxillae differ from typical es- 

 chrichti in their shape. Instead of being roughly circular to oval, 

 they are clearly elongate and form obvious, rather comblike struc- 

 tures transversely along the marginal area (fig. 2td). 



This subspecies brings to mind Verrill's (1894) Cribrella pectinata 

 from Eastport, Maine, later (VerriU, 1914) placed as a variety of 

 Henricia sanguinolenta following the finding of intermediate forms. 

 This specimen resembles pectinata in having dorsal paxillae separated 



