86 FrecUrick Chipvian : 



In the Lower Devonian of the Karnic Alps, in beds adjacent to Silurian 

 rocks, a Murchisonia-like shell has lieen descrited and figured b}-- 

 Frech,^ referred to Miirchisonia davyi, Barrois, and compared with. 

 Lindstrom's M. compressa previously cited. The Lower Devonian 

 fauna of Bohemia is also fairly rich in examples of Coelocaulus. In 

 Bassler's " Bibliographic Index of American Ordovician and Silu- 

 rian Fossils "- there are no less than twelve American species listed, 

 seven of which are of Upper Silurian (Niagaran) age, three of 

 Ordovician age, and two of Lower Devonian. 



Coelocaulus brazieri, Etheridge fil. (Plate III., Figs. 20-22). 

 jyiso (Vetotuhn) brazieri, R. Etheridge. jnr., 1890. Rec. Aust.. 

 Mus., vol. I., No. 3. p. 62, pi. VIII., figs. 4, 5; pi. IX., figs. 2, 3. 

 Cresswell, 1894. Proc. R. Soo. Vict., vol VI. (N.S.), p. 158. 

 Chapman, 1907. Rec. Geol. Surv. Vict., vol. II., pt. I., pp. 11, 17. 

 Description , emended. — Shell turriculate, elongate-conical, slowly 

 tapering to a blunt apex. Apical angle from 25 deg. to 30 deg. 

 Sides gently convexly curved. Whorls about 12 in full-grown 

 examples; surface convex to nearly flat. Sutures fairly Avell 

 impressed. Slit-band slightly below median line, feebly concave, 

 bounded by raised threads above and below. Traces of spiral 

 threads on the rest of tlie whorl. Umbilical cavity open from the 

 base to the apex, sides undulating owing to the convex impinge- 

 ment of the Avhorls on the inner surface. Seen in section the whorls^ 

 are quadrately globose, and secondary thickening has occurred in 

 some examples, which tend to flatten the external surface of the 

 shell by filling up the suture lines. Length of the largest example 

 about 70 mm., or more when complete. 



Observations. — We have already pointed out the relationship of 

 the above and other i-elated forms to Mitrvlti^onia under the generic 

 heading of Goeloc<ndus. It is interesting to find another species of 

 the same gi'oup in Australia, in the Devonian of Yass, viz., C. 

 darwinii; thus showing that this peculiar type of .shell had as 

 extensive a range as many another Silurian or Devonian genus, and 

 helping to link up the faunas of the two formations. 



Occurrence. — Silurian (Yeringian). In limestone, Cave Hill,. 

 Lilydale. From the collection of the Rev. A. W. Cresswell, M.A. 

 Also presented by Mr. J. S. Green and Dr. G. B. Pritchard. In 

 beds of similar age from Marble Creek, Gippsland (Geol. Surv. Vict. 

 — determined by the author). 



1 Zeitschr. d. deutschen geol. Gesellsch., vol. xhi., pt. iii., 1894, p, 45S, pi. x.xxii., figs. ia-d. 



2 United States National Museum, Bull. No. 92, 19Xib, p. 249. 



