222 



fossil shell is larger and more solid, although it must be 

 stated that, if an immature fossil shell be selected for com- 

 parison with only the same number of whorls developed as 

 in the mature living form, the latter seems to be the broader 

 of the two. As these differences are constant I am convinced 

 that the living form, although identical with the fossil form 

 in other important respects, is quite a distinct species, and I 

 propose, with the concurrence of Professor Tate, that it 

 should be named N. Beddomei, in honour of my friend 

 Captain Beddome, who, by his dredging operations, has so 

 largely added to our knowledge of the marine fauna of 

 Tasmania. 



Trivia Exjeopea. 

 The small or dwarfed fossil specimens collected by me at 

 Table Gape were originally referred to — T. Europea, by Mr. 

 Woods. In his " Notes on the Fossils " of Table Cape, 

 p. 91, Proc. Eoy. Soc. of Tas , 1876, he states : " Trivia 

 Europea and Eulimella suhulata are Euroj^ean forms, which, I 

 believe, occur at Table Cape as fossils." I am satisfied now, 

 however, from examination of a larger number of specimens, 

 that all the specimens of the former so determined by Mr. 

 Woods are dwarfed or young representatives of Trivia avella- 

 noides, McCoy. This fossil also occurs in the turritella lime- 

 stone of Flinders' Island. Fragments of this rock are 

 abundant on the beaches on Barren, Badger, Clarke, and Swan 

 Islands in Bass' Straits. The fragments are usually drifted 

 ashore attached to seaweed, and in one collected by me on 

 Swan Island I disclosed the cast of a small perfectly 

 characterised T. avellanoides, associated with fragments of 

 fossils too imperfect for specific identification belonging to 

 the following genera, viz., Cylichna, Voluta, Pectunculus, 

 Limay Tellina. 



Teigonia acuticostata (McCoy). 

 Although this species was included in my " Comparative 

 Table showing Distribution of Australian Marine Tertiary 

 Shells," etc., pp. 90a., 90f., Proc. Eoy. Soc, Tas., 1876, I 

 did not refer it to the Table Cape beds as supposed by Professor 

 Tate. Up to the present time I have neither seen nor heard 

 of this species being discovered in Tasmanian tertiary 

 deposits. I may also mention that I cannot altogether concur 

 with Professor McCoy when he states that the acute nodose 

 squamae are characters which separate T. acuticostata from all 

 living species. As regards the living T. Margaretacea, it may 

 be confidently affirmed that fresh or unworn shells do not 

 show blunt lamellose squamae until the individuals are well 



