52 T. S. Hall: 



Locality. — -Base of cliffs at mouth of Sherbrooke River, com- 

 mon, but usually crushed. Associated with Eupatagus laubei, 

 Maretia anomala and Brissopsis dennanti. At a higher level 

 Lovenia forbesi is common, but I have not found it below. 

 Most of the specimens in the lower bed have patches of spines 

 still attached. These and the matrix adhere very closely, and I 

 have not been able to clear thein with the dental engine. 

 Exposed portions are usually sandpolished by the action of the 

 surf. Barwonian (? Eocene). 



Schizaster abductus, Tate. 



1891. Tate, Tr. and Proc. Roy. Soc. S. Australia, p. 281. 



Tate's description consists mainly of a comparison of the 

 species with S. australis, Gray, and is unaccompanied by a figure 



A specimen in my collection from the type locality, Morgan, 

 given me by Master Frank Cudmore, is in a much better state of 

 preservation than Tate's two examples, the larger of which is the 

 type. For the loan of these I have to thank Mr. W. Howchin, 

 F.G.S., actual comparison being necessary for identification. 



The species is broad-ovate, pointed posteriorly. In lateral 

 view the dorsal surface rises regularly from the anterior end to 

 the vertex, which is on a median ridge, two-thirds of the distance 

 between the apex and the postei-ior end. Base sliglitly tumid. 

 Subanal area vertical. Periproct its own height below the top 

 of the overhanging posterior projection and visible from below. 

 Anterior ambulacrum in a deep groove which only slightly 

 indents the ambitus. Lateral petals in grooves as deep as that of 

 the anterior ambulacrum. Anterior lateral at first widely 

 diverging and then running forwards at about 40 deg. with the 

 mid-dorsal line. Their length sliglitly less than one-third of the 

 transverse diameter. Length of posterior petals about a fifth of 

 the transverse dianaeter of the test. Less divergent than the 

 anterior ones. Peristome lunate, posterior lip prominent. Peri- 

 petalous fasciole crossing the anterior ambulacrum at a distance 

 from the apex equal to the semi-diameter through the apex_ 

 From here it runs with a scarcely perceptible re-entering angle 

 to the anterior lateral petal. Between the lateral petals it 

 forms a deep re-entering angle, keeping close to the edges of the 



