Victorian Fossils, Fart XIV. 297 



TSvo Australian species of this genius have been recorded. 

 In the first phice de Koninck^ doubtfully refers to a minute 

 pygidium from the silurian limestone at Boree Cave, New South 

 Wales, to /. wahltnhergi, Barrande ; but in the absence of a 

 full description, figures, or the type specimen, it is impossible 

 to discuss this reference. /. wahlenhergi of Barrande'- is a 

 shorter and stouter form than the present, and has prominent, 

 extended, genal spines ; whereas in /. jutsoni the genal pro- 

 cesses are closely adpressed to the upper part of the thorax. 

 The second specimen known from Australian rocks is /. John- 

 ston i, Eth. jnr.'^ described by Mr. Etheridge from the silurian 

 of Zeehan, Tasmania ; and from rocks of like age at Borenore 

 near Orange, New South Wales. This latter species is, as Mr. 

 Etheridge points out, of the type of 7. murchisoni, Salter. 



Occurrence. — In olive-brown indurated mudstone of silurian 

 (melbournian) age. From a quarry between Heidelberg and 

 Templestowe. Collected and presented by Mr. J. T. Jutson. 



Fam. Encrinuridae. 



Genus Encrinurus, Emmrich. 



Subgenus CPOmus, Barrande. 



Encrinurus (Crofnus) spryi, sp. nov. (PL LXII., Fig. 1). 



Description. — Carapace sub-oval ; anterior broad, roundly 

 acuminate at posterior extermity. Central axis prominent ; 

 pleural areas strongly convex. 



Cephalon hemispherical, less than half as long as wide. 

 Glabella subpyriform, comparatively narrow behind, finely tuber- 

 culate anteriorly, and with two deep, transverse sulci above the 

 neck rings, interrupted in the middle. Fixed cheeks sometimes 

 tuberculate, with a deeply grooved posterior margin. Eyes 

 prominent, not often well preserved in these specimens. 



Thoracic segments eleven, comparatively narrow and crowded ; 

 axis slender, about one-quarter the width of the carapace ; 

 pleura thickened or tuberculate at the axa l furrow. 



1 Descr. Pal. Foss. N. S. Wales.— Mem. Geol. Surv. N. S. Wales, Pal., No. 6, 1898, p. 36. 



2 Nouv. Trilob., 1846, p. 13. Also Syst. Siliir. Boheme, 1852, vol. i., p. 684, pi. xxxiv., 

 figs. 19-24. 



3 Tasmania; Report of the Secy, for Mines for 1895-6, p. xlii., pi.—, fijj;-. 3. AlsoKec. 

 Geol. Surv. N. S. Wales, vol. viii., pt. iv., 1909, p. 319, fiys. 1,2. 



