SEA LILIES, STARFISHES, ETC. CLARK. 71 



all are labelled thirty fathoms and it is possible they were not 

 all taken at that depth, nor at the one spot. One has only 

 4 arms, having divided very recently ; a second has 6 arms, 

 with indication of a seventh ; a third has 9 arms ; the re- 

 mainder have eight. None are notably large or small. 

 Seven specimens. 



Loc. — Oyster Bay, Tasmania, 30 fathoms. 



Genus Cosmasterias, Sladen. 



COSMASTERIAS DYSCRITA,! Sp. nOV. 



(Plate xxix., fig. 1-2.) 



Rays 5. Il==67mm. ; r=ll mm. ; R=6 r. Br=15mm. 

 R=4.5 br. Br at middle of ray =12 mm. ; at 20 mm. from 

 disk-centre, 17 mm. ; at tip, 2.5 mm. Disk small, somewhat 

 arched ; rays shghtly contracted at base, then increasing 

 quickly to maximum breadth, and then tapering steadily to 

 the narrow tip. Abactinal skeleton thick, moderately heavy, 

 with small and distinct papular areas ; those on disk con- 

 tain 3-7 papulae, while the larger ones along sides of ray have 

 6-8. Disk plates without definite arrangement, bearing 2-10 

 low capitate spinelets, about .5 mm. high and .25 mm. thick 

 at tip ; there are also a very few big jelipedal (as Verrill calls 

 them) pedicellarise, nearly a millimeter long scattered here 

 and there, besides numerous minute pedicellarise of the 

 ordinary type ; neither spines nor pedicellariae are in the least 

 crowded at any point. Madreporite not very large but quite 

 conspicuous, being situated at the centre of a large, elevated 

 plate, half way between disk-centre and margin, surrounded 

 by a circle of 12-15 spinelets. Abactinal plates of rays similar 

 to those of disk but arranged in 13 series at base of arms, a 

 medioradial series with a dorsolateral series on each side, then 

 the superomarginals, the inferomarginals, and 3 series of 

 actinolaterals ; of the latter, the series next the adambulacrals 

 extends less than one-third of the ray, the second reaches to 

 about the middle of ray or a httle beyond, and the third goes 

 to within 15-20 mm. of the tip. All the plates above the 

 actinolaterals carry capitate spinelets and pedicellarise like 

 the disk-plates, usually only 2-3 spinelets on a plate ; the 

 actinolaterals each carry one, or often two spines, the largest 

 on the Starfish ; near the mouth they are 2 mm. long, blunt, 

 somewhat flattened and nearly a milhmeter wide ; on the 



1- ^uo-/f^(To^=liard to determine ; in reference to the uncertain relation- 

 ships of the species. 



