194 Proceedings of the Royal Society of Victoria. 



Remarks. — This ornate cristellarian belongs to the group of 

 which C. cassis, Fichtel and Moll, sp., forms a central type. 



The original specimens figured by Wisniowski, came from the 

 upper Jurassic (Am. ornatus beds) of Poland. 



Occurrence. — One specimen ; Jurassic, Geenough River district, 

 West Australia. [2135]. 



Cristellaifia daintpeei, sp. nov. (PI. XXII., Fig. 13. 



Specific characters. — Test ovate-elongate, compressed, nine 

 chambers visible, those forming the spiral portion sparsely 

 granulate to tuberculate. The sutural depressions of the last 

 three chambers bridged over by about seven short longitudinal 

 costae. The last chamber is somewhat inflated. Length 0.46 

 mm. ; greatest width 0.2 nun. 



Affinities. — The nearest analogue to this species is C. gemmata, 

 Brady^ Both forms have a compressed test, but the ornamen- 

 tation of C. daintreei difters essentially in the semi-costate 

 surface markings of the last few chambers. 



In the character of the ornament C. daintreei also resembles 

 some extreme forms of C. f ragraria, Giimbel sp. ( = C, 

 wetherelli, Jones sp.)- in which the test is strongly compressed, 

 and the later chambers costate. 



The present species is named in honour of the late Mr. Richard 

 Daintree, F.G.S., who presented the larger fossils to the National 

 Museum. 



OccJirrence. — One specimen; Jurassic, Greenough River district,. 

 "West Australia. [2136]. 



C pi Stellar! a COStata, Fichtel and Moll, sp., var. 

 compressa, nov. (PI. XXII., Fig. 14). 



Ref. to type-form. — 



Nautilus costatus, Fichtel and Moll., 1798, Test. Micr., p. 47,. 

 pi. iv., figs, o, h, and /. 



Remarks. — The present variety, compressa, is a strongly com- 

 pressed form. The spiral commencement is not well developed, 



1. Rep. Chall., vol. ix., 1884, p. 554, pi. Ixxi., fig. 6, 7. 



2 Abbandl. k. bayer. Ak. Wiss., m. p.h. CI., vol. x., p. G35, pi. i., figs. 58a-c. 



I 



