1872.] ETHEKIDGE — aUEENSLATS D EOSSXLS. 343 



pretend to define ; and only a few other fossils occur or are asso- 

 ciated with it in the collection. 



In Europe and Britain the type form is abundant in the Neoco- 

 mian, Gault, and Upper Greensand beds. 



Our shell is more acute than Sowerby's typical form, the pos- 

 terior or anal border or extremity in this variety being less trun- 

 cated ; it however gapes as much. I do not believe it is more than 

 a varietal form. 



Loc. Pelican Creek. Form. Cretaceous. 



Inoceramtts makaxhonensis, Ether. PI. XXII. fig. 1. 



Shell elongated and compressed; umbonal region narrow, acute, 

 and tapering ; ventral portion of shell much expanded (much of 

 specimen lost) ; concentric plications or undulations variable, being 

 alternately broad and narrow, and unequal, 



Obs. We possess only one specimen of this form ; and that includes 

 only about two thirds of the original shell, the ventral margin being 

 lost. In size and shape it somewhat resembles /. annulatus from 

 the White Chalk of Westphalia ; but the want of the true outer shell 

 prevents our referring it to that species, the equidistant lines of 

 growth in /. annulatus being characteristic and well defined. 



Prof. M'Coy (Trans. Eoyal Soc. Victoria, vol. vii. 1866, p. 57) 

 describes a shell from the Flinders range, which he calls /. Suiher- 

 landi, referring to it as having affinity with /. Cuvieri through 

 its concentric undulations, shape, and size, but having a more acute 

 or narrow anterior end ; want of a figure throws doubt upon the 

 identity of our two shells. 



Inoceeamtjs mitlxiplicaxtjs, Stol., var. elongattts, Ether. PL XXII. 

 fig. 2. 

 Bef. Pal. Indica, vol. ii. t. 28. f. 1, p. 406. 



Shell much elongated, with numerous concentric ribs, which 

 become coarser and flatter near the ventral margin ; umbones acute 

 and apparently incurved ; whether they approximate or not we have 

 no means of determining, as we possess only one valve. 



With the exception of being more elongated than the shell de- 

 scribed by Dr. E. Stoliczka, Pal. Indica, vol. iii. p. 406, t. 28. f. 1, 

 our shell appears to be the same species, allowing for those varia- 

 tions which the species in this genus exhibit. It is not so ventri- 

 cose a shell as I. striatus, Mant., from the Lower Chalk of Sussex, 

 Saxony, &c. 



At first I was inclined to refer this shell to /. prohlematicus, 

 D'Orb., of the "Etage Turonien," or lower white Chalk of Erance; 

 but the peculiarity of the concentric folds removes it from that 

 species. 



Loc. Marathon station, Elinders Piver. Form. Cretaceous. 



Inoceramtis PEE.N0IDES, Ether. PL XXII. fig. 3. 



Shell quadrate, deep ; umbonal region thick and elevated ; beaks 

 acute ; anterior side slightly convex ; the ventral margin broadly 



