LOWER CRKTACEOUS FOSSILS — ETHERIDGE. 153 



former stage there occur from three to five plain costse between 

 every two node-bearing ribs, but in the latter there may be as 

 many as ten plain costse occupying such a position, and here the 

 tubercles often extend across three costs?, but without rendering 

 the latter fasciculate. Septa concave on the whole, but with a 

 very rolling surface arising from the development of the lobes 

 and saddles, which are highly digitate. 



Obs. — C. jjlectoides is remarkable for the general uniformity of 

 its characters throughout the various stages of growth so far as 

 they are known to me ; it is a compact and well grown shell and 

 one of the neatest of our Crioceri. 



The costse are narrow rounded ribs, not sharp crests, and 

 appear to retain this character throughout life. Tuberculation 

 of the costse is similarly preserved, so far as the growth of the 

 species is known to me. The tubercles are node-like, obtuse, and 

 round in the earlier stages of growth, one to each costa, but in 

 later conditions three ribs appeal- to be involved in each tubercle, 

 the latter perched on them as it were : these, however, do not 

 divert the course of the costse and render them fasciculate. The 

 finer details of the sculpture are unknown, as the test is not 

 2> reserved in any case. 



In the sectional outline of the whorls, and wide venter, C. 

 ])lectoides approaches C. nautiloides, but differs in its costation 

 and tuberculation. 



The shaft and crozier are unknown. 



Locs.— Cameron Downs, south of Hughenden, North Queens- 

 land [G.S.Q.]. Wellshot Run, near Barcaldine, Central Queens- 

 land [G.S.Q.]. Walsh River, a tributary of the Mitchell River, 

 C ipe York Peninsula [Q.M.]. Mount Cornish, near Muttaburra, 

 Central Queensland [Q.M.]. Barcoo, Ward and Nive Rivers 

 District [A.M. (//. W. BlomJMd)]. Queensland ! [U.S. J. {Central 

 Australia [G.S.]. 



Crioceras flindersi, McCoy, sp, 



(Plate xxxvi., fig. 2 ; PI. xxxix.; PI. xl.; PI. xli.; PI. xlii., fig. 2; 



PI, xliii.; PI. xliv., fig. 2.) 



Ancyloceras Flindersi, McCoy, Ann. Mag. Xat. Hist., 4., xx., 



1867, p. 356. 

 Ancyloceras Flindersi, Eth. fih, Mem. Geol. Survey N.S. Wales, 



Pal. No. 11, 1902, p. 44, pi. viii., figs. 1-3. 

 Crioceras Flindersi, Eth. til., S. Austr. Pari. Papers, 1905, 



No. 71, p. 14, pi. i.,f. 1., pi. iii., figs. 1-8. 



