74 '' ENDEAVOUS SCIENTIFIC RESULTS. 



Distribution. Hitherto known only from " Thetis " speci- 

 mens taken off the coast of New South Wales at the fol- 

 lowing localities: Station 34, off Port Jackson, 39-36 

 fathoms ; Station 44, off Coogee, 49-50 fathoms (Thomson 

 and Mackinnon). 



MOPSEA ELEGANS, Thom.son and Mackinnon. 



Mopsea elegans, Thomson and Mackinnon, Mem. Austr. 

 Mus., iv., 13, 1911, p. 677, pi. Ixiv., figs. 3, 4, pi. 

 Ixviii., fig. 5, pi. Ixxii. 



A number of broken pieces showing dichotomous, sub- 

 parallel branching, agree with Thomson and Mackinnon's 

 type. The height of the largest fragment is 18 cm., with 

 a width of 1-3 cm. The branches vary from 1-5 mm. to 

 2 mm. in diameter. 



The polyps are arranged in two alternating rows on each 

 side of the younger branches, leaving a median bare line on 

 each surface. They tend, however, to encroach on these, 

 especially towards the lower portions of the colony, where 

 they are arranged in three or four rows. A comparison with 

 the polyps of the " Thetis " type shows that the " Endeavour" 

 specimens are more slender, a difference due probably to 

 drying. 



The spicules of this species are : (1) superficial ctenoid 

 scales, each with a nucleus from which radiate fine ridges 

 077 x -052 mm. ; -061 x -052 mm. ; -043 x -043 mm. ; (2) 

 tuberculate capstans with scarcely any waist -057 x -043 

 mm. ; -049 x -035 mm. ; -038 x -035 mm. 



The colour is golden-brown. 



Localities. Shoalhaven Bight, New South Wales, 15-45 

 fathoms. 



Six miles S. 30 E. of Brush Island, New South Wales, 65 

 fa "horns. 



Distribution. Hitherto known only from " Thetis " speci- 

 mens taken off the coast of New South Wales at the following 

 localities : Station 34, off Port Jackson, 39-36 fathoms ; 

 Station 41, off Wata Mooli, 52-71 fathoms ; Station 42, off 

 Wata Mooli, 70-78 fathoms ; Station 47, off Bulgo, 63-57 

 fathoms ; Station 48, off Wollongong, 55-56 fathoms 

 (Thomson and Mackinnon). 



