1G2 RECORDS OK THE AUSTRALIAN MUSEUM. 



Crioceras taylori, Eth.ftl. 

 (Plate xlix.j figs. 3-G.) 



Ancyloceras Taylori, Eth. til., Geol. Pal. Q'land, etc., 1892, 



'p. 498, pi. xlii., £. 13. 

 (?) Ancyloceras, sp. ind., Eth. fil., Bull. Geol. Survey, Q'land, No. 

 13, 1901, p. 33, pi. ii., £. 5. 



Sp. Chars. — Shell below medium size. Whorls apparently not 

 more than three, close coiled ; shaft moderately stout, slightly 

 curved, but total length unknown ; crozier loop- or link-shaped, 

 UDsymmetrically curved, returning directly towards the limb, but 

 not quite in the same plane, almost touching the latter; venter of 

 both whorls, shaft and crozier broad and rounded; dorsum of the 

 whorls and shaft rounded, of the crozier flat; flanks of the whorls 

 rounded, but of the shaft and crozier flattened ; section of the 

 shaft gradually becoming longitudinally oval, and on the crozier 

 transverse or broad-oval. Costa? obtuse, on the whorls simple 

 transverse and touching one another ; on the shaft similar but 

 separated by well marked valleys, those of the venter inclined 

 forwards, on the dorsum backwards, and on the flanks slightly 

 sigmoidal ; on the crozier transverse or slightly sigmoidal, well 

 separated, and often bifurcate, the bifurcation taking place low 

 down on the flanks around the dorsal or umbilical edges. 

 Tubercles absent. 



06,s-. — One of the most striking features of C. taylori is the 

 general simplicity of its thick costaj. There is no trace of 

 tubercles at any stage of growth. 



G. taylori is undoubtedly allied to C. laqueus in size, form, and 

 presence of the loop-like crozier, the remarkable fact being that 

 the outer limb of the crozier is not quite in the same plane as the 

 curve of the shaft proper, and whilst returning towards the 

 latter does not appear to abut against it. 



The costa; are round and cord-like, very regular, without 

 fasciculation, and no trace of bifurcation until the curve of the 

 crozier is reached In their simplicity they greatly resemble 

 both those of the genus Macroscaphites, and Ancyloceras simplex, 

 D'Orb., chosen by Hyatt as the type of his Dirrymeceras. A ' 



I have provisionally incorporated in the synonomy the reference 

 to an ''■Ancyloceras" I described from the collection of Mr. 

 (',. Sweet, Melbourne, obtained at Hughenden ; it certainly 

 possesses features in common with C. taylori. 



' Hyatt— Zittel's Text-Book Pal., Eastman's Edition, i., 1900, p. 586. 



