ALDINGA AND THE RIVER-MUERAT CLIFFS, SOUTH AUSTRALIA. 293 



Loc, Living: European seas, Madeira, Florida, Bass's Straits. 

 Fossil : European Eocene, Miocene, Pliocene, and Postpliocene, and 

 Mt. Gambler. 



21. Cribrilijsta figularis, Johnst. 



Lepraliajigularis, Johnston, Brit. Zooph. ed. 2, p. 314, pi. Ivi. fig. 2. 



Cribrilina Jic/idaris, Hincks, Brit. Mar. Polyzoa, p. 196, pi. xxvi. 

 figs. 5-7. 



Cribrilina philomela, Busk, var. adnata^ Busk, ' Challenger ' Ee 

 port on the Polyzoa, pt. xxx. p. 132, pi. xxii. fig. 7. 



A specimen from the Eiver-Murray Cliffs has characteristic zo- 

 oecial avicularia (onychocellaria), which correspond most nearly with 

 those figured for C. Jigidaris, var. Jlssa, Hincks (loc. cit. fig. 8). 

 This, like var. adnata, has numerous costse (nine on each side) ; more 

 of the front is covered with costEe than in Mr. Hincks's figures, but 

 not quite as much as in Mr. Busk's. Oral aperture 0-13 mm., which 

 is about the same as in the Australian species. 



Loc. Living : British, French, and Mediterranean seas ; Capri, 40 

 fathoms ; off Marion Islands, 50-75 fath. ; Heard Islands, 75 fath. 

 Fossil : River-Murray Cliffs, Crag (Bell). 



22. Cribrilina TEEMiNATA, Waters. 



OribrUina terminata, Waters, Quart. Journ. Geol. Soc. vol. xxxvii. 

 p. 326, pi. xvii. fig. 68, vol. xxxviii. p. 507, pi. xxii. fig. 6, and 

 vol. xxxix. p. 436, pi. xii. fig. 17. 



A specimen from the Eiver-Murray Cliffs has two or three minute 

 avicularia above the oral aperture, and the zooecial avicularia are 

 narrower than the one figured from Muddy Creek (I. c. vol. xxxix. 

 pi. xii. fig. 17). 



Loc. Fossil : S.W. Victoria, Bairnsdale, Muddy Creek, and the 

 Eiver-Murray Cliffs. 



23. MucRONELLA MUCRONATA, Smitt; Wators, Quart. Journ, Geol. Soc. 

 vol. xxxvii. p. 328, pi. xvii. fig. 66, vol. xxxviii. pp. 266 & 507, 

 and vol. xxxix. p. 436. 



The mucro supports an avicularium directed forwards. It occurs 

 in Eschara- and Hemeschara-form. 



24. MucRONELLA NiTiDA, Yerrill, 



Discopora nitida, Yerrill, Amer. Journ. Science, vol. ix. p. 415, 

 pi. vii. fig. 3 (1875). 



Muci'onella nitida, Verrill, Proc. U. S. I^at. Mus. p. 195 ; Waters, 

 Quart. Journ. Geol. Soc. vol. xxxviii. p. 507. 



Smittia nitida, Hincks, Ann. & Mag. Nat. Hist. s. 5, vol. vii. 

 p. 159, pi. ix. figs. 5, 5 a. 



Lepralia reticulata, var. incequalis, Waters, Ann. & Mag. Nat. 

 Hist. ser. 5, vol. iii. p. 41, pi. ix. fig. 3. 



Smittia trispinosa, Johnst., var. ligulata, Eidley, Proc. Zool. Soc. 

 London, 1881, p. 53,' pi. vi. fig. 9. 



The Murray-Cliff fossil incrusts a Cellepora. It shows consider- 

 able variation in the size of the avicularia ; sometimes they are ligu- 



Q. J. G. S. No. 163. Y 



