SEA LILIES, STARFISHES, ETC. — CLARK. 17 



base, separate it from C. pinguis. From the South AustraUan 

 species C. trichoptera, the size, the cirri and the pinnules all 

 distinguish it without difficulty. 



Loc. — East of Flinders Island, Bass Strait, 100-300 fathoms. 



Two specimens. 



COMANTHUS SPANOSCHISTUM,! Sp. nov. 



(Plate IV., fig. 3.) 



Disk 5-12 mm. in diameter ; arms 30-80 mm. long. Centro- 

 dorsal large and flat, 5 mm. in diameter in adults, and about 

 1 mm. thick. Cirri, in one or in two imperfect series, about 

 XXIV., 15-20 ; the longest are 10-15 mm. long ; segments 

 4-7 or 3-8 are cylindrical and longer than wide, segment 4 (or 5) 

 may be nearly twice as long as thick ; distally the segments 

 are a trifle compressed and the distal margin dorsally is 

 elevated to form a low tubercle, which, at least on the pen- 

 ultimate segment, is spiniform. Radials hidden ; IBr 1 low 

 and wide, more or less in contact ; radial axillary triangular, 

 high and pointed, the height about two-thirds of the width. 

 IIBr series, not often developed; when present, invariably 

 4 (3-J-4) ; arms usually 10, in one specimen 13, in another 14, 

 and in a third 19; No IIIBr series is developed. Brachials 

 at first quadrilateral, but soon becoming triangular ; distal 

 margins becoming more and more flaring and overlapping 

 until near tip of arm where the brachials become quadrilateral 

 again and the margins hardly flare. Syzygies between 3 and 

 4 and then at an interval of 7-11 segments ; after that the 

 syzygial interval is usually 5, but may be only 3. Pinnules 

 long and slender ; Pi is over 10 mm. long and consists of about 

 30 segments, of which about 15 make up the comb ; P2 is 

 somewhat smaller and P3 is only 8 mm. long and consists of 

 20 segments, 9 in the comb ; P^ is 8 mm. long, but has no 

 comb ; succeeding pinnules become more slender and increase 

 in length to about 10 mm. ; basal segments of lower pinnules, 

 more or less triangular with greatly flaring, spinulose margins 

 which tend to project like rough spurs on the aboral side of 

 the largest segments, much as in the preceding species {C. 

 plectrophorum). Disk, except around tip of anal tube, 

 smooth and naked ; there are calcareous nodules in the anal 

 tube. Mouth interradial. Colour, in alcohol and dry, more 

 or less yellowish, with either a green or a brown cast ; one 



1. (r7ro»/o'?=rare4-ff;;^<<rTo'9=divided, in reference to the scarcity of arm 

 divisions. 



