Vn-lorian T'Ws/V.s', Part IX. 209 



111 nearly all cases they liorc smaller loculi on their lateral 

 walls, and these appear in the casts as luaiiniiillate protuberamoes. 

 Cavities connected by rather long and and conspicuously curved 

 stolons. Averaire diameter of chambers, 4 mm. ; length of con- 

 necting stolons, about 3 inm. ; width, 0.5 mm. 



These borings occur on the surface of the internal cast of a 

 Voluta having a length of 16.5 cm., and the Cliona crypts en- 

 tirely cover the spire and a large part of the body -whorl. 



Observations. — In the absence of spicules it is difficult to 

 separate the fossil casts of the boring sponge Cliona by charac- 

 ters which may be regarded as specific. In the present in- 

 stance, however, certain features are exhibited which we 

 can use for future reference, and we may therefore reasonably 

 give it ai distinguishing name. As an example of Cliona borings 

 already specifically described we may refer to Cliona ("Ento- 

 bia") cretacea, Portlock^ a common form in Cretaceous shells in 

 Britain and elsewhere, which is I'ecogiiised by its regularly 

 spheroidal form, crowded clianibers and comparatively fine, 

 radiating system of stolons. 



Locality and Horizon. — Swan Reach, Bairnsdale Lakes. Ter- 

 tiary (Ivailimnan). Pres. by Mr. H. J. Hauschildt. [9146]. 



? Cliona peregpinator, sp. nov. 

 (PI. XVI II., Fig. 4). 



Specific Characters. — Crypts globular to pyriform, sometimes 

 united into a more or less lengthy tube. The passages from 

 chamber to chamber ;ire often reduced to a mere constriction 

 and there is also evidence of occasional, long slender stolons. 

 Diameter of an average-size globular chamber, 2.5 mm. ; length 

 of pyriform chambers, rather less. The habit of this organi:Hm 

 in the wandering manner of its growth is unlike the majority 

 of Clionae. The fossil occurs on the surface of a limestone cast 

 of a coT*al, Comoseris, into the coenenchyina of which it had 

 bored in the errant manner described. 



Locality and Horizon. — Valley of the Moorabool at Maude. 

 Tertiary (Barwonian). Coll. Geol. Surv., Vict. WT.M2. [9153]. 



1 (Jtnl. Loiidondrrry, 1813, Ji- •'*>*'• *^'^'<-' 'il*^<' Clioiiites coiin lieari, Morii-^ : Ami. .Mu^. 

 Nat. Hist., \ nl. \ Mi., 1851, pi. viii., fi^-. 9. 



