BEY0Z0A FEOH ATJSTEALIA. 439 



many layers, and the zccecia are heaped together and irregularly 

 disposed. There are usually only two " stout marginal spines,'' 

 not four as described by Smitt in the specimen from Florida, and in 

 the Australian fossil these are very irregularly placed. The oral 

 aperture is nearly round, and of the same size as in the Floridan 

 specimen, viz. 0*15 millim. wide. 



In the aperture there are three denticles, similar to those in 

 Smittia reticulata, and therefore I unite it with that genus, though 

 not without much doubt as to where it should be placed. 



Loc. Living : Florida, 26-44 fath. 



50. ScHIZOPOEELLA AESTBALIS, T. Woods. 



Tetraplegia australis, T. Woods, Tr. Boy. Soc. N. S. Wales, 1878, 

 p. 5. fig. 4. 



ScJiizoporella australis, Waters, Bry. from S.W. Victoria, p. 341, 

 pi. xiv. fig. 15. 



A specimen from Bird Bock has fine granulations and fine pores, 

 as described in my former paper, p. 341. 



Loc. Muddy Creek (Woods); S.W. Yictoria (A. W.) ; Bird Bock. 



51. SCHIZOPOEELLA SCHIZOSTOMA, MacG. 



Lepralia schizostoma, MacGillivray, Nat. Hist. Vict, deca deiv. 

 p. 33, pi. 38. fig. 6. 



The zocecia are small, ovate, with a small oral aperture and large 

 globose ovicell. Immediately below the oral aperture there is an 

 avicularian prominence, which is not described by MacGillivray, 

 but is figured about the centre of the front of the zocecium. Width 

 of oral aperture 0-05 millim. 



Loc. Living : Williamstown and Queenscliff. Fossil : Waurn 

 Pond Quarry, Suffolk Crag (A. W. W. coll.). 



52. Schizopoeella submeesa, Waters. 



Schizoporella submersa, Waters, Bry. S.W. Vict. p. 340, pi. xviii. 

 fig. 5. 



Fossil : Curdies Creek (W.), Muddy Creek. 



53. Betepoea maesupiata, var. muceo^ata. Plate XII. fig. 13, 21. 

 This differs from most specimens of B. marsupiata in having a very 



large oval avicularium below the aperture ; but we see in Smitt's 

 fig. 248 (Floridan Bry.) that there is sometimes such an avicula- 

 rium ; above this the peristome rises into a mucro. The opening 

 on the front of the ovicell is wide, pointed above and rounded below. 

 The dorsal surface is divided into nearly equal areas by an irregular 

 line running clown the middle, from which lines branch off; at the 

 base of each dorsal division there is a narrow avicularium directed 

 diagonally downwards (see fig. 36, pi. xv. Bry. fr. S.W. Vict.). 

 Loc. Fossil : Muddy Creek. 



54. Betepoea Beaniaxa, King. 



Betepora Beaniana, King, Ann. Nat. Hist. vol. xviii. 1846, p. 237 ; 



