452 AUSTIN HOBART CLARK, 



tralia"; Torres Strait; Murray Island, Torres Strait; Port 

 D e n i s o n , Queensland; Dimes Island, New Guinea. 



Depth. Littoral, and down to about 65 m. 



Notes. The specimen from Turtle Island has arms 130 mm long, 

 there is a fine carination on the ossicles of the IBr series and on the 

 brachials; the cirri are X (in tive pairs), 13, comparatively large, 10 to 

 11 mm long. 



Of the specimens from Stat. 14, one has the anterior arms 125 mm 

 long, the posterior being 70 mm in length ; the cirri are VII (four arranged 

 in two pairs, the other three single), 12 14, 10mm to 12mm long; four 

 of the arms lack the arnbulacral groove, and there are no grooves on the 

 genital pinnules of the others; a fine mid-dorsal carination is present on 

 the ossicles of the IBr series and on the brachials. A second specimen 

 has the anterior arms 130 mm long, and the posterior arms 95 mm long; 

 four entire arms, and the genital pinnules of the others, are ungrooved; 

 the cirri are VII, as in the preceding. The third specimen is similar to 

 the first. 



The specimen from Stat. 15 has the anterior arms 120 mm long and 

 the posterior arms 90 mm long; the pseudosyzygy between the first two 

 brachials is practically indistinguishable from a true syzygy, and is very 

 brittle as in the type specimen, which this very closely resembles except 

 for its larger size; the arms are slightly swollen; the ossicles of the IBr 

 series and the brachials have a fine narrow mediodorsal ridge running 

 their entire length as is usual in the species; the cirri are V, 1113, 

 8 mm to 9 mm long. 



One of the specimens from Stat. 19 has the anterior arms 160 mm 

 long and the posterior arms 85 mm long; this is a fine large specimen, 

 typical of the species, with the usual type of small weak cirri ; there is a 

 prominent very narrow median carinatiou running the entire length of the 

 arms, and also occurring on the ossicles of the IBr series; the anterior 

 arms are slender and elongate, the posterior scarcely more than half as 

 long, and somewhat swollen in the proximal half; four of the arms have 

 no ambulacral grooves at all, and in the other six only the distal pinnules 

 are supplied with them; the cirri are IX, 12, 7 mm long; the colour is 

 light yellow -brown. A second specimen has the anterior arms 135 mm 

 long and the posterior arms 70 mm long; the cirri are IV, 10 12, 7 mm 

 long; two of the arms are ungrooved, and the genital pinnules on the 

 others lack grooves ; the colour is light yellow-brown. The third specimen 

 has the anterior arms 110 mm long and the posterior arms 80 mm long; 

 the cirri are VII, 10-11, 5 mm to 7 mm long; the arms have the same 

 mediodorsal carination as in the other specimens; three arms are wholly 



