550 " THETIS " SCIENTIFIC RESULTS. 



with a close pavement of flattened granules, largest in the inter- 

 radial areas. Apex of jaws with a group of flattened, slender, 

 pointed, but hardly spiniform teeth ; sides of jaw with four or Ave 

 similar, but smaller oral papillae. One large madrepore plate. 

 Genital slits short but conspicuous. Oral teatacle-pores incon- 

 spicuous ; next pair conspicuous and without tentacle-scales ; 

 succeeding pores are protected hy four or five short, thick, 

 tentacle-scales (arm-spines'?), of which the inner are much the 

 largest. Smallest branches of arms show the usual arrangement in 

 the Astrophytidse, of alternating rings of minute hooks, and of 

 granules. Colour, uniform reddish-brown. Other specimens are 

 much paler, and some are nearly white. 



1 specimen from Station 12. Off" Cape Three Points, 23-34 

 fathoms ; sand. 



6 specimens from Station 44, Off Coogee, 49-50 fathoms; 

 fine sand. 



1 specimen from Station 49. Off Port Kembla, 63-75 fathoms; 

 mud and pebbles. 



1 specimen from Station 53. Oft Crookhaven River, 23 

 fathoms ; rock. 



6 specimens from Station 54. Within Jervis Bay, 10-11 

 fathoms ; seaweed and sand. 



1 specimen from Station 55, Off Crookhaven River, 11-15 

 fathoms ; sand to rock. 



3 specimens from Station (?) 



The largest of these specimens has the disc nearly 50 mm. in 

 diametei', the tubercles are more numerous than in the type and 

 are vei-y rough, the arms branch seven times, and there are six 

 tentacle-scales at the base of tha arm ; in other respects it 

 resembles the type very closely. The smallest specimen has the 

 disc only 3 mm. in diamster, and the arms branch only once or 

 twice ; there is a single large tubercle on the disc, at the base of 

 each arm. The differences between this species and the following 

 in the form and arrangement of the tubercles seem to be very 

 constant, and it is an easy matter to separate specimens of the 

 two when they have been mixed. If one may judge from the 

 '* Thetis" collection, this species seems to be decidedly the more 

 common. 



CONOCLADUS OXYCONUS. 



Conocladus oxyconus, H. L. Clark, Bull. Mus. Comp. Zool., lii., 

 1909, p. 132. 

 One specimen from Station 10. Off Broken Head, 28 fathoms ; 

 fine sand. 



