54 



THE FIRST RECORDED OCCURRENCE OF 

 BLASTOIDEA IN NEW SOUTH WALES. 



By T. Griffith Taylor, B.Sc, B. E., Assistant Demonstkator 

 in Palaeontology and Geology, Sydney University. 



The specimens were found during a visit to Clarence Town for 

 the purpose of collecting fossils in the Carboniferous Series at 

 that place. They occur in calcareous sandstone, together with 

 Crinoids (Actinocrinus), Trilobites (Phillipsia dubia) and Brachio- 

 pods such as Leptcena analoga, Orthis resupinata and Producing 



semireticidatus. The beds dip 

 somewhat steeply to the east 

 towards the Williams River, 

 the layer in which the blastoids 

 were found being marked by a 

 persistent layer of crinoid joints, 

 somewhat weathered and con- 

 fusedly intermingled together. 

 The district has been surveyed 

 geologically by Mr. J. B. Jaquet, 

 and the beds in question are 

 known as the Glenwilliam Car- 

 boniferous Series. 



The specimens are two in num- 

 ber, and may be distinguished 

 as A and B. They occurred near 

 together in the same block of 

 sandstone, and they both consist 



of portions of the calyx. A corn- 

 Fig. 1. -Sketch of Specimen A showing . , -n t i e -\ t 

 large Radial (E) and Basal (B). P nses a lar g e Radlal or forked 



plate, with some portion of the 



ambulacral plates preserved, and at the side a small isolated 



basal plate (see fig. 1). B consists of the external cast of a Radial 



plate, which shows very well the prominent bulge below the 



