ALDINGA ASH THE EIYER-MFRRAY CLIFFS, SOUTH AUSTRALIA. 299 



41. Lepralia burlikgtoxiexsis, Waters, Quart. Journ. Geol. Soc. 

 vol. xxxviii. p. 270, pi. vii. fig. 6. 



42. Lepralia surimmeesa, MacG. 



Lepralia suhimmersa, MacGillivray, Nat. Hist, of Victoria, Zool. 

 decade iv. p. 23, pi. xxxv. fig. 5. 



Zoarium in Eschara-form growing as solid lamellate anastomosing 

 fronds. Zooecia subhexagonal, bounded by prominent slightly 

 sinuous lines ; surface smooth, with large pores near the border. 

 Oral aperture round above, concave below, with a small oral avicu- 

 larium just below the aperture, sometimes in the peristome. The 

 state of preservation does not allow of satisfactory examination of 

 the aperture. From one broken-down ovicell it is clear that it was 

 entirely immersed. 



Loc. Living : Warrnambool. Fossil : Aldinga. 



43. Lepralia confixtta, sp. nov. (PI. Yll. fig. 10.) 



Zoarium in Eschara-form, flat. Zooecia indistinct, surface with 

 a few large pores amd small round avicularia scattered about ; oral 

 aperture round above, slightly contracted below, with a tooth on 

 each side. The aperture (O'lo-0-16 mm. wide) is surrounded by a 

 round band. The zooecial characters remind us of Myriozoum 

 truncatum, but the cells and aperture are there larger. It is also 

 allied to Lepralia crassa, Reuss, and L. varians, Seg. I have some 

 flat bilaminate fragments of a similar recent Lepralia dredged by 

 Mr. Brazier from Piper Island (9 fathoms), but the zooecia are much 

 smaller, with the aperture about 0*12 mm., and the surface is dotted 

 over with numerous small round avicularia. Possibly they should 

 be united, although the more robust character of the fossil makes a 

 considerable difference in the general appearance. 



Loc. Aldinga. 



44. SmTTiA Tatei, T.-Woods. (PL YII. fig. 15.) 



Bschara Tatei, T.-Woods, Trans. Eoy. Soc. K S. W. 1876, p. 3, 



fig. XV. 



Smittia Tatei, Waters, Quart. Journ. Geol. Soc. vol. xxxvii. p. 337, 

 pi. xvii. fig. 65, and vol. xxxviii. p. 271, pi. vii. fig. 10, pi. viii. 

 fig. 21. 



Smittia Perrieri, Jullien, Bull, de la Soc. Zool. de France, p. 19, 

 pi. xvi. fig. 45. 



There are small flattened branches from the Murray Cliffs ; and 

 from Aldinga there is a most interesting colony in which the round 

 branches anastomose and form a reticulate mass. The diameter of the 

 branches is about 3 millim. In this specimen there is a peristomial 

 sinus instead of the suboral pore; but this sinus is frequently almost 

 closed in above, and no doubt the function is the same in both 

 cases. 



Loc. Living: IST.W. of Spain, 2108 metres (Jullien). Fossil: 

 Curdles Creek Mt. Gambier, Bairnsdale, Waurn Ponds, Eiver- 

 Murray Cliffs, Aldinga. 



