98 Proceedings of the Royal Society of Victoria. 



costte are not so well marked, tlie usual forms showing neat 

 costse distinctly, while some examples of this species are much 

 more strongly developed in this respect, and at first sight strike 

 one as being a distinct species, but on closer examination, they 

 can only be regarded as varieties. On the whole, most of the 

 I'epresentatives from the Eocene beds at Muddy Creek, Western 

 Victoria, are finely ornamented, and more elongate, while in the 

 examples from the Eocene clays of Mornington we note many 

 somewhat shorter and relatively broader, with much coarser 

 spiral threads, and coarser costa?, running into a rarer form with 

 still stronger and as a consequence fewer costaj, and with more 

 angulate whorls, though in the finer ornamentation and other 

 characters of the shell, I think inseparable from the above species. 

 The latter variety without close examination of a good series, 

 might be taken for a new species, but fortunately it has not up 

 to the present been described as such, and I therefore take this 

 opportunity of expressing the opinion that it ought to be included 

 with the present species. 



In another place in Professor Tate's above mentioned work in 

 dealing with our common Ranella, which he wrongly identifies 

 as Triton pratti, T. Woods, he states that " Triton prattii was 

 founded on immature specimens of what proves to be a Ranella, 

 belonging to the sub-genus Argobuccinum, characterised by an 

 elevated spire, short beak, and the absence of a posterior canal ; 

 and I have thought it needful to describe and figui'e an adult 

 example." 



Even after T. Woods was cognisant of Professor Tate's opinion 

 about the young Ranella, he still adhered to his own opinion that 

 it was a Triton and described it as such. So that in my opinion 

 Professor Tate seems to have been in some way misled into 

 redescribing Triton pratti, T. AVoods, under the name of Triton 

 gemmulatus. 



The above may best be summarised as follows ; — 



LOTORIUM PRATTI, T. Woods. 



1878. Triton prattii, T. Woods. Proc. Lin. Soc. N.S.W., 



vol. iii., p. 223, pi. 21, f. 15. 

 1888. Triton gemmulatus, Tate. Trans. Roy. Soc. S.A., 



vol. X., p. 126, pi. 6, f. 8. 



