440 A. W. WATEES ON FOSSIL CHILOSTOMATOUS 



Hincks, Brit. Mar. Polyzoa, p. 391, pi. liii. figs. 1-5. (See Hincks 

 for synonyms.) 



In the fossil from Muddy Creek the central zooecia have a rounded 

 avicularium, directed downwards, within the aperture ; but the outer 

 zooecia have a subspatulate avicularium directed laterally. 



It is somewhat doubtful if the species described by Stoliczka is 

 really R. Beaniana. 



Loc. Fossil : Muddy Creek and English Crag. 



55. Cellepoea fossa, Haswell. 



56. Cellepoea albicans, Hincks. 



57. Cellepoea geantjm:, var. Plate XII. fig. 18. 



Cellepora granum, Hincks, Gen. Hist, of Mar. Polyzoa, p. 68, pi. iii. 

 fig. 8 • Ann. & Mag. Nat. Hist. Aug. 1881. 



The fossil varies in having the peristome closed in, which thus 

 forms an elongate tube. In Cellepora Costazii, Aud., from the 

 Mediterranean, a similar variation is found ; for occasionally the 

 peristome is entirely closed. 



Loc. Fossil : Batesford or Muddy Creek. 



58. Selenaeia punctata, T. "Woods. 



Selenaria punctata, T. Woods, " On some Recent and Fossil Spe- 

 cies of Selenariadce," Trans. Phil. Soc. Adelaide, 1879, p. 9, pi. ii. 

 %. 8. 



The large pores below the aperture are denticulated, as are also 

 the rosette plates. The vibracular areas are broken ; but they are 

 so similar in character to those of Selenaria maculata that I should 

 expect that in perfect specimens they will be found covered with a 

 cribriform calcareous expansion. Aperture 0*21 milliin. wide. 



This species is very closely allied to Caleschara denticidata, MacG. 

 (Nat. Hist. Victoria, decade v. p. 45, pi. xlviii. fig. 8). 



Loc. Living : Cape Three Points, Australia ( Woods), 71 fath. 

 Fossil : Muddy Creek. 



59. Selenaeia maculata, Busk. Plate XII. figs. 7, 9, 12. 

 Selenaria maculata, Busk, Cat. Mar. Pol. p. 101, pi. cxvii. 



The shape of the opesia in the fossil is slightly different from 

 that of recent specimens in my possession from Holborn Island ; and 

 I therefore give figures of both for comparison. In the fossil the 

 zooecia and aperture are somewhat wider than in the recent specimens, 

 and the lip is nearly as broad as the opesia, whereas in the recent 

 specimens this lip is narrow and almost spicular. Some authorities 

 may think that on this account the fossil ought to be called a va- 

 riety ; others perhaps would attach specific value to this difference. 



The way in which the Selenariadse begin to grow is a subject 

 worthy of complete investigation ; but in the meantime the few 

 specimens in my possession throw some light upon it. The fossil 

 has grown upon a small stone, probably crystalline ; and upon 



