826 " THETIS " SCIENTIFIC RESULTS. 



abcauline, here bends suddenly towards the interior of the hydro- 

 theca, forming a narrow ledge at its base. Gonosome. — unknown. 



Dimensions. — 



Colony, height 15 cms. 



Stem, diameter at base 5mra. 



Fascicle tube, diameter 008mm. 



Hydrotheca, length of adnate portion... 0'28-0-31 ,, 



„ ,, „ free portion 0-08-011 ,, 



,, greatest diameter 0"10-0"12 ,, 



It is difficult to decide to which of the older species of the 

 genus Cryptolaria arboriform,is is most closely related ; for its 

 gnarled, tree-like habit, and its dumpy hydrothecse, almost 

 altogether adnate, with their cavity cut off from that of the 

 axial tube by an in turned ledge, distinguish it from every other 

 species. 



Localiti/. — Station 44, oflf Coogee, five to six miles from shore; 

 depth, 49 to 50 fathoms; bottom, fine sand ; 15th March, 1898. 

 Type Specimens. — In the Australian Museum, Sydney. 



CRYPTOLARIA CONFERTA, Allman, 

 var. AUSTRALIS, var. nov. 



(Plate Ixxxiv., fig. 2; Plate Ixxxvii., fig. 1.) 



Cryptolaria conferta, Allman, Mem. Mus. Comp. Zool. Harvard, 

 v., 1877, p. 17, pi. xii., figs. 6-10. Id., Clarke, Bull. Mus. 

 Comp. Zool., v., 1879, p. 244, pi. iii., figs. 14-20. Id., Cam- 

 penhausen, Abh. Senck. Ges. Frankfurt, xxiii., 1896, p. 309. 

 Id., Versluys, Mem. Soc. Zool. France, xii,, 1899, p. 32. 

 Id., Pictet and Bedot, Res. Camp. Sci. Monaco, fasc. xviii., 

 1900, Hydraires, p. 17, pi. ii., fig. 3, pi. iii., fig. 7. 



Lafoea conferta, Billard, Exp. Sci. " Travailleur " et "Talisman," 

 viii., 1907, Hydroides, p. 177. 



Stations 40 and 42. 



Trophosome. — The stems of the colonies are flexible and 

 straight, the largest about 8 cms. high, yet scarcely one millimetre 

 in diameter at the base. From base upwards the stem bears 

 pinnate branches of finer texture than itself, and these occur at 

 regular intervals from each other, a distance of 3 mm. separating 

 two on the same side ; vvhile those on the opposite side alternate, 

 and both series lie in one plane. The pinnae are generally simple, 

 from 1 to 2 cm. long, but they are frequently replaced by long 



