70 ; ' ENDEAVOUR " SCIENTIFIC RESULTS. 



Distribution. Indian Ocean (Ellis, Pallas). Mediterranean 

 Sea and America (Pallas). North Sea (Linnaeus). Iceland 

 (Olafsen and Polveseii, Lamouroux). Antilles and United 

 States (Lamouroux). Straits of Sunda and southern coast 

 of Sumatra (Ellis and Solander). East Indies (Dana). Am- 

 boina (Milne-Edwards et Haime). Pacific Ocean (Wright 

 and Studer). Andaman Sea, surf line and 20 fathoms 

 (Thomson and Simpson). The Siboga Expedition obtained 

 specimens at nine stations in the eastern part of the Indian 

 Archipelago at depths varying from 22-45 metres (Nutting). 



Genus MOPSEA, Lamouroux. 



MOPSEA DICHOTOMA (LinnCBUS). 



Isis dichotoma, Linnaeus, Syst. Nat., 10th ed., 1, 1758, 

 p. 799. Id., Lamarck, Hist. anim. sans vert., ii., 

 1816, p. 302. 



Mopsea dichotoma, Lamouroux, Hist. Polyp, corall. flexibles, 

 1816, p. 467. Id., Milne-Edwards et Haime, Hist. 

 Nat. Corall., 1857, p. 197. Id., Wright and Studer, 

 Chall. Rep., Zool., xxxi.. 1889, p. 41, pi. ix., fig. 10. 

 Id., Hickson, Proc. Roy. Soc. Viet., (n.s.), ii., 1890, 

 p. 137. Id., Roule, Exped. Antarctique Frangaise, 

 1908, Alcyonaires, p. 5. Id., Thomson and Mac- 

 kinnon, Mem. Austr. Mus., iv., 13, 1911, p. 673, pi. 

 Ixvii., fig. 1. 



A number of broken pieces showing dichotomous branching 

 are referred to this species. In the majority of the specimens 

 the polyps are arranged in close-wound spirals all over the 

 branches. On the most slender specimens, however, the 

 polyps occur in alternating rows on each side, here and there 

 encroaching on the free median spaces. The spicules are 

 as described by Thomson and Mackinnon. 



Locality. South east coast of Australia. 



Distribution. Indian Ocean (Lamarck, Lamouroux). Port 

 Jackson, New South Wales, 35 fathoms (Wright and Studer). 

 Port Phillip, Victoria (Hickson). Booth- Wandel Island, 

 Antarctica (Roule). The " Thetis ' specimens were ob- 

 tained at the following localities off the coast of New South 

 Wales : Station 47, off Bulgo, 63-57 fathoms ; station 48, 

 off Wollongong, 55-56 fathoms ; station 53, off Crookhaven 

 River, 23 fathoms (Thomson and Mackinnon). 



