666 " THETIS " SCIENTIFIC RESULTS. 



fox"ins into the genns Alcyonium, where the sub-genus Eryth.ro- 

 podium is designed for those that grow as membranous expansions. 



Locality. — Eleven miles east of Broken Bay. 



Previously recorded from 34°7'3" S. Lat., 24°59'3" E. Long., 

 Francis Bay, 100 metres. 



ALCYONIUM (ERYTHROPODIUM) REPTANS, Kilkenthal. 



(PI. Ixi., fig. i.) 



Alcyonium reptans, Kiikentha], Alcyonacea — Wiss. Ergeb. 

 deutsch. Tiefsee Expod., xiii., 1, 1906, pp. 53-.^4, pi. ii., fig. 9, pi. 

 ix., figs. 45-49. 



Stations 17, 34, 41, 42, 43, 44, 48, 53. 



For 57 cm. of its entire length (83 cm.) the axis of a specimen 

 of Primnoella australasiae is completely overgrown with a light 

 chocolate-coloured, Spiipoditnn-like Alcyonid, which agrees with 

 KiikenLhal's description of Alcyonium ( Erythro2)odiumJ reptans. 

 The .same .species covers a branched Gorgonid axis from which all 

 trace of the original coenenchyma has disappeared. Numerous 

 smaller specimens also occur that show scarcely more than a 

 fibrous residue of the Gorgonid axis which the Sympodium-like 

 mass had originally made its support. Without the more com- 

 plete specimens with which to make a comparison, these last 

 forms would be very diilicult of interpretation. 



The .spicules in every case are (1) slender spindles with few 

 and simple warts, -306 x 084 mm. ; -27 x 032 mm. ; -204 x -017 

 mm. ; (2) stouter, blunter .spindles with more numerous, projecting 

 tuberculate warts — "255 x 068 mm. ; -238 x '052 mm. y (3) 

 flattened spindles with jagged and toothed margins — -323 x 051. ; 

 •289 x "034 mm. ; (4) a few irregular bodies — '085 X -0^ mm. 



Locality. — Eleven miles E. by N. of Barrenjoey, 30-40 

 fathoms, rocks. 



Previously reeorded from the east side of Bouvet Island, 

 470 metres. 



ALCYONIUM ETHERIDGEI, sp. nov. 



(PI. Ixi., fig. 2 and 3 ; pi. Ixii., fig, 3 ; pi. Ixvii., fig. 4 ; pi. Ixix.) 



Stations 10, 17, 28, 31, 34, 41, 44. 



This striking form is represented by numerous speojmens. The 

 largest colonies have the following dimensions. — Height and 

 breadth in centimetres 7*5 x 8, 85 x 8-5., and 9-5 x 7., the 

 smallest is "5 cm. high by "7 cm. broad. 



