160 KKCORDS OF THB AUSTRALIAN MUSEUM. 



as already stated, has but two. C. tabarelU was selected by 

 Hyatt as the type of his genus Acrioceras.* 4 



C. cordi/cepoides and the next species, C. laqueus, are the only 

 forms falling into Hyatt's Family Crioceratidse, as defined by 

 him. 45 



Loc. — Oaka-towya or Dalhousie Springs, north of Oodnadatta, 

 Central Australia. 



Criockras laqueus, Eth.fd. 

 (Plate xlix., figs. 7-9.) 



Ancyloceras or Hamiles, sp , Eth. til., Trans. Roy. Soc. N. S. 



Wales, xvii., 1883, p. 89, 2d pi., lower 1. h. fig. 

 Hamites (?) laqueus, Eth. fil., Geol. Pal. Q'land, etc., 1892, 



p. 496, pi. xlii., figs. 14 and 15. 

 Crioceras, sp., Eth. fil., Geol. Pal. Q'land, etc., 1892, p. 502, 



pi. xxxiii., figs. 4 (1 5 and 6). 

 Anisoceras (?) sp., Eth. fil., S. Austr. Pari. Papers, 1905, No. 71, 



p. 14, pi. i., f. 2; pi. ii., figs. 1-3. 



Sp. Chars. — Shell small. AVhorls apparently not more than 

 two; shaft long, curved; crozier comparatively large, unsym- 

 metrical, loop- or link-shaped, returning directly towards the shaft, 

 but not quite in the same plane, almost touching the latter ; 

 initial apex vermiform, blunt ; lumen large. Venter of the whorls 

 and shaft narrow but convex, comparatively broad on the crozier; 

 dorsum of the shaft appears to be costate, but in the bend of the 

 crozier flat and smooth ; flanks gently convex. Costa? strong and 

 sharp, transverse on the venter, oblique or slightly sigmoidal on 

 the tianks, absent (?) on the dorsum of the crozier, some single, 

 but usually fasciculate in bundles of two or three, the component 

 ribs of each fasciculus united by a series of very prominent 

 tubercles, supra-dorsal in position, again passing over the dorsum 

 of the shaft single, double, or treble ; along the abdominal lines 

 on each side the middle line of the venter is a row of smaller 

 tubercles or nodes, one to each costa. 



Obs. — A comparison of all the specimens represented by the 

 above synonomy has convinced me they are one and the same 

 species, and that the name Anitoceras applied to one of them 

 must be dropped. 



1 1 Hyatt— Zittel's Text-Book Pal., Eastman's Edition, i., HKlO, p. 58S. 

 1 Hyatt — Loc. <■>/ , p, 58S. 



