I ( ; s Frederick Chapman: 



The Rev. G. F. Whidborne has described from the Middle Devonian 

 of Lummaton, Devonshire, England, a species named G. pengettii, 1 

 which appears to be midway between C. sternbergi and C. gibbus. 



The glabella is not so broad as in the Victorian specimens, and the 

 posterior lateral wings of the fixed cheeks not so extended. 



The Victorian specimens show the fixed cheeks to he finally granu- 

 lated, as in typical specimens of C. sternbergi. 



The stratigraphical distribution of the three species above re- 

 ferred to affords an interesting comparison with regard to the Vic- 

 torian occurrence. G. gibbus and G. pengettii are both found in 

 the Devonian alone, whilst C. sternbergi, with which the Victorian 

 specimens are identified, has a range extending from the Silurian 

 to the Upper Devonian (Etages E-H). 



Horizon and Occurrence. — Silurian (Yeringian). Tn mudstone. 

 Ruddock's quarry, near Lilydale. Presented by Mr. J. S. Green. 



In dark grey limestone, Wandin Yallock, near Seville, coll. by 

 F. Chapman. Also a wax squeeze from a specimen in Mr. J. S. 

 Green's collection, from the same localitv. 



Fam. Phacopidak. 



Genus Phacops, Eramrich. 



Phacops crossleii, Etheridge fil. and Mitchell. (Plate XV., Figs. 

 14, 15). 



Phacops crossleii, Etheridge, jnr., and Mitchell, 1896, Proc. 

 Linn. Soc. N.S. Wales, vol. X., 2nd ser., p. 489, pi. XXXIX., figs. 

 9-11. 



Observations. — This species has been described by the above 

 authors from the Upper Trilobite bed of Bowning, near Yass, N.S. 

 Wales. In Victoria it lias been met with in the Yeringian synclinal 

 fold of the Lilydale district, and it thus agrees in stratigraphical 

 position with its occurrence in New South Wales. 



The specimen here figured from the Lilydale district is almost 

 perfect (fig. L4). It measures about 41 mm. in length, and equal 

 to that of Etheridge and Mitchell's type from Bowning, judging 

 from tin- figures of the thorax and pygidium given by those authors. 

 One of the eves is well preserved, and the vertical rows of lenses 

 number about -J I ; the New South Wales specimens average about 

 IT. 



The Devonian Fauna of the S. of England, pt. i. (Mon. Pal. Soc), vol. xlii., 18S9, p. S, pi. i. 

 10- 12, 18, IB. 



